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HomeMy WebLinkAboutStormwater Report - 94 FLAGSHIP DRIVE 7/21/1995 DRAINAGE CALCULATIONS DEVELOPMENT ASSOCIATES FLAGSHIP DRIVE NORTH ANDOVER, MASSACHUSETTS PROJECT NO. 7365 Soil Types Within the Drainage Area: Symbol Soil Name Hyd. Group Pa Paxton Fine Sandy Loam C Wr Woodbridge Fine Sandy Loam C �.�HOF DAVID ® EDWARDp Ross 0 No.29903 �l aVI G� DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 cn o �8w a s Q 6 g n c Q way m w >`a F O w O z o z y � nn! niu C -- na ��''-- -------- ----------- es I M i l l i 1 1 i a i w I a e N x N 3 ry B Z � o �I s 0 4: yz r o CL g wz J o R (n Q W^, R I- d LI^ Z ID _j / t / / I i ' N >° --;;�-_-tea ----------------------- � o 00 Ljj I i i l i l i coM L Ys VA 11J 6� A (�OfF-® C% 0NLY �g ' o$ u gi s Z x r s o R W Q Rp 'jA (n W J m K W >-o o s o Ic Z i i t o - � n ai t<--- /1 E4 @ im 61 AM b f-1 S _•��°_ —t `�y�------ , �g es� ----- --FizM > I i i l l l l l l l i 1 1 1 1 1 I i li illldi�dll6 CD LLJ 1 roC T" ° o Y Z 0 STORMWATER °�❑�o MODELING APPLICATION NOTE 4 ° ❑� ° SYSTEM A COMPARISON OF TR-20 and TR-55 RUNOFF METHODOLOGY HydroCAD runoff determination is based upon the USDA Soil Conservation Service Technical Release Number 20, commonly known as SCS TR-20. TR-20 uses a numerical unit hydrograph procedure for predicting runoff. This is the most precise procedure developed by the SCS for this purpose. Because of the complexity of TR-20 it isn't practical to perform these calculations by hand. To provide a non-computerized solution, SCS used TR-20 to develop a set of tabular hydrographs which could be manipulated by hand. This information constitutes the "Tabular Method" as published in TR-55. Since the TR-55 tables are derived from TR-20, the accuracy of TR-55 can at best match that of TR-20. In many situations the results will be very close, and the two methods can be used interchangeably. However, the assumptions and simplifications used to develop TR-55 can produce errors in certain cases. The TR-55 manual specifically advises: "Use the TR-20 computer program instead of the tabular method if any of the following conditions applies: • Tc is greater than 2 hours. • Drainage areas of individual subareas differ by a factor of 5 or more. • The entire composite flood hydrograph or runoff volume is required for detailed flood routings." Other limitations stated in TR-55 include: • The minimum Tc is .1 hours. Use of TR-55 when Tc<.1 will result in underestimation of runoff. • Tc is rounded to the nearest tabulated value thus underestimating or overestimating runoff. • All tables were developed with a curve number of 75. As the CN varies from 75 accuracy is reduced. These differences are clearly summarized in the TR-55 manual: "This method (TR-55) approximates TR-20, a more detailed hydrograph procedure . . . Use TR-20 if the watershed is very complex or a higher degree of accuracy is required." This applies particularly to the design of detention basins which are very sensitive to changes in the inflow hydrograph. Again quoting from TR-55: "The procedure (TR-55) should not be used to perform final design if an error in storage of 25 percent cannot be tolerated . . . More detailed hydrograph development and routing will often pay for itself through reduced construction costs." For these reasons and others, users of TR-55 are gradually shifting over to products based on TR-20. While this change will insure more accurate studies, the engineer must still meet local and state requirements, some of which still specify T R-55. In response to this the following points can be made: 1) In many applications TR-20 will produce almost identical results to TR-55 and can be used interchangeably. In such cases TR-55 can be used to verify TR-20 studies, and vice versa. 2)When results do differ it is due to the inaccuracy of TR-55. In most instances, it will be found that one or more of the limitations listed above has been exceeded. In these cases ignoring the (correct) results obtained with TR-20 can lead to inadequate drainage designs and future problems. i Note: See Application Note 5 for a comparision of other aspects of TR-20 and TR-55. 6133-4 rev.9/19/91 Page Hill Road, Chocorua, New Hampshire 03817, U.S.A. APPLIED MICROCOMPUTER SYSTEMS phone: 603-323-8666 Fax: 603-323-7467 T °drouAD ' Hy ST ORMWATER ° ®��, ,�El" 0/,- / \ MODELING APPLICATION NOTE 5 � ❑ ° SYSTEM A COMPARISON OF HydroCAD, TR-20, AND TR-55 The following table summarizes the similarities and differences between these three programs. Note that HydroCAD combines selected features of TR-20 and TR-55 with other capabilities. HydroCAD TR-20 TR-55 Runoff methodology SCS unit hydrograph SCS unit hydrograph Tabular method derived (also see A.N. 4) • procedure procedure from TR-20 Rainfall types SCS type I, IA, II, & III, SCS type I, IA, II & III SCS type I, IA, II & III plus user-defined storms Unit hydrograph SCS or Delmarva U.H., SCS Unit Hydrograph or SCS Unit Hydrograph only plus user defined curves user defined curve Curve number entry Weights multiple curve Requires direct entry of Weights curve numbers numbers composite curve number Curve number No restrictions No restrictions Reduced accuracy as CN limitations differs from 75 Time of Calculates Tc by all TR-55 Contains no Tc Calculates Tc for sheet, concentration methods plus common calculations: Requires shallow concentrated, & calculations channel shapes, upland direct entry of Tc channel flow method, & CN method Tc limitations No restrictions No restrictions Limited to .1 to 2 hrs Tc precision 1/10 minute (1/600 hour) 1/100 hour Rounded to nearest step Subarea limitations None None Must not differ by more than a factor of 5 Runoff accuracy Within 1% of TR-20 "The standard" Within 25% of TR-20 Reach routing Storage-indication method Modified Att-Kin procedure Separate runoff tables for with automatic calculation travel times of 0 to 3 of stage-discharge hours Pond routing. Storage-indication method Storage-indication method None, estimates effect Stage-discharge Automatic calculation for Must be entered directly, n/a curve hydraulics many common outlets no calculations-provided Stage-storage curve Automatic calculation from Direct entry n/a areas, plus direct entry Routing diagram Interactive, on-screen none none Calculation procedure Automatically triggered by "Batch mode" calculation Manual initiation of each- changes and sequenced by of entire watershed calculation routing diagram Graphics capabilities Full graphics to screen, none none printer, plotter, or file. Report Generation Automatic with graphics Manual Manual Data storage Automatic by project name Manual I Manual 6133-5 rev.9/19/91 Page Hill Road, Chocorua, New Hampshire 03817, U.S.A. APPLIED MICROCOMPUTER SYSTEMS phone: 603-323-8666 Fax: 603-323-7467 Drainage Analysis : The following calculations are intended to estimate the rate of runoff to and the hydraulic conditions of the stormwater drainage system on the site. The calculations are based upon the methodologies outlined in TR-20 by the U.S . Soil Conservation Service (SCS) as adapted by the HydroCAD Computer Program. A brief description of the set-up and function of the computer program is attached. The calculations indicate that the existing drainage system on-site is adequate to handle the runoff from storms up to and including the 100-year storm event under both pre and post construction conditions . Calculations have been performed to determine the extent of any increase in runoff due to the expansion of the parking lot . The results of this analysis are tabulated below: Storm Event Runoff (cfs) 2-Year 10-Year 100-Year Pre 4 .7 7 . 6 11 .7 Post 5 .3 8 .3 12 .3 The pre vs . post development runoff calculations indicate that there will be a slight increase in the rate of runoff . This increase is only a fraction of a cfs . Calculated increases that are this small are essentially insignificant when compared against the accuracy of hydrologic calculations . Calculations have also been performed to determine if the downstream drainage system is adequate . These calculations have been performed up to the point the piped drainage system discharges to the wetland on the opposite side of the road. These calculations should be considered approximate as detailed topography, inverts, etc . are not available for drainage areas off locus . The calculations indicate that the southern outfall, that below Pond 4, is capable of handling the existing flows and the increase in runoff through Pond 4 (0 .5 cfs in a 100-year storm) . The northern outfall, that below pond 5, receives runoff from a large upgradient area including about 700 feet of road and two developed commercial lots . This outfall does not appear to be adequately sized for current inflows . The proposed work on the site, however, will result in an increase of less than one percent, only 0 .2 cfs in a 100-year storm. This small increase should not adversely DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 f � J I j I 1 I j 1 1 I .. I. 2-YEAR EXISTING DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 -repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems ATERSHED ROUTING O ZL /5\ � z 12 0 OSU13CATCHMENT � REACH POND l� LINK eta for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 -repared by David E . Ross Associates, Inc. droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 3 .1 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS UBCAT AREA Tc WGT'D PEAK Tpeak VOL NUMBER (ACRE) (MIN) --GROUND COVERS %CN -- CN C CFS (HRS) - AF 1 .76 15 . 7 95070 5089 - - 71 - . 5 12 . 23 . 04 2 .67 7 . 0 21098 55098 16089 7077 95 - 1 . 8 12 . 09 . 11 3 .42 2 . 9 33098 33098 33074 - 90 - 1 . 1 12 . 03 . 06 4 .42 2 . 9 5098 55098 29074 12077 89 - 1 . 1 12 . 04 . 06 5 .40 3 . 0 48098 53074 - - 85 - . 9 12 . 04 . 05 ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Drepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK NO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) (FT/FT) (FPS) (MIN) (CFS) 1 - 2 . 0 1 . 0 9 . 00 9 . 00 . 100 115 . 0240 . 8 2 . 5 .4 ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E . Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK - ---- - PEAK FLOW ------- ---QOut-- - NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. LAG (FT) (FT) (FT) (AF) (CFS) (CFS) (CFS) (CFS) (o) (MIN) 1 243 . 5 245 . 0 244 . 2 . 01 . 5 .4 26 11 . 9 2 237 .2 242 .4 238 . 0 0 . 00 1 . 8 1 . 8 0 . 1 3 235 . 8 240 . 5 236 . 6 0 . 00 1 . 1 1 . 1 0 . 1 4 235 . 5 241 . 0 237 . 2 0 . 00 3 . 8 3 . 8 0 0 . 0 5 237 . 9 241 . 0 238 .4 0 . 00 . 9 . 9 . 9 0 . 1 rata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 'prepared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 Applied microcomputer Systems ;UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= .5 CFS @ 12 . 23 HRS, VOLUME= . 04 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR . 04 89 DIRT PILE RAINFALL 3 . 1 IN 76 71 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment pr- (min CR-55 SHEET FLOW Segment ID: 7 . 6 Goods : Light underbrush n= .4 L=50 ' P2=3 . 1 in s= . 07 ' / ' 8 . 1 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: forest w/Heavy Litter Kv=2 . 5 L=320 ' s= . 07 ' / ' V= . 66 fps Total Length= 370 ft Total Tc= 15 .7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABODE PARKING LOT .45 AREA= . 76 AC . 4e Tc= 15. 7 MIN . 35 CN= 71 . 38 SCS TR-20 METHOD u 25 TYPE III 24-HOUR 3 RAINFALL= 3 . 1 IN . 2© _j . 15 PEAK= . 5 CFS . 1O @ 12 .23 HRS ME= . 04 AF .05 0 .00 to m in m In m un m LO m Ln m m m - - N N rrl �l �Y V In Lt 1 �D TIME (hours) ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN prepared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems UBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 1 . 8 CFS @ 12 . 09 HRS, VOLUME= . 11 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 37 98 PARKING LOT RAINFALL= 3 . 1 IN . 11 89 DIRT PILES, GRAVEL/DIRT AREA SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED MIX-. POOR- C . 67 95 Iethod Comment To. (min) TR-55 SHEET FLOW Segment ID: 5 . 5 'Voods : Light underbrush n= .4 L=40 ' P2=3 . 1 in s= . 1 ' / ' -55 SHEET FLOW Segment ID: 2 Smooth surfaces n= . 011 L=10 ' P2=3 . 1 in s= . 03 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 3 ?aved Kv=20 . 3282 L=210 ' s= . 017 ' / ' V=2 . 65 fps Total Length= 260 ft Total Tc= 7 . 0 SUBCATCHMENT 2 RUNOFF DRAINAGE AREA TO CATCHBASIN 4 1 . 8 1 - 7 AREA= . 67 AC I .6 1 5 L,1A 7 MIN 1 . 4 5 1 . 3 j :j ETHOD 1 .9 -HOUR g . 1 IN 7 6 8 CFS 4 9 HRS. 3 . 1 1 AF .2 8 .0 m LO m Ln 0 LA m Ln m o m m m N N M M V IT LCD 0 TII`1F_ (hours) r )ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 [ droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems ;UBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 1 . 1 CFS @ 12 . 03 HRS, VOLUME= . 06 AF ACRES CN SCS TR-20 METHOD .14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 3 . 1 IN . 14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS .42 90 Aethod Comment To. (min) IR-55 SHEET FLOW Segment ID: 1 .4 Grass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 ' /' TR-55 SHEET FLOW Segment ID: •7 Smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 ' / ' 8 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 . 3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 . 9 SUBCATCHMENT 3 RUNOFF DRAINAGE AREA TO CATCHBASIN 6 1 . 1 1 AREA= . 42 AC 9 Tc= 2 . 9 MIN CN= 90 .8 -7 SCS TR-20 METHOD .6 TYPE III 24-HOUR 5 RAINFALL= 3 . 1 IN 0 3 PEAK= 1 . 1 CFS @ 12 . 03 HRS 2 UOLUME= . 06 AF 1 0 .0CD D m t) m D m in CD n CD n m m m N N r'1 M \T d ID M 1,0 TIME (hours) ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Drepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ___ UBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 1 . 1 CFS @ 12 . 04 HRS, VOLUME= . 06 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR . 23 98 PAVEMENT RAINFALL= 3 . 1 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C .42 89 9ethod Comment Tr. (min) TR-55 SHEET FLOW Segment ID: 1 .1 Smooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 8 Paved Kv=20 . 3282 L=200 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 250 ft Total Tc= 2 . 9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 1 . 0 AREA= . 42 AC . 9 Tc= 2. 9 MIN g CN= 89 L' 7 SCS TR-20 METHOD u .6 TYPE III 24-HOUR .5 RAINFALL= 3 . 1 IN 0 . 4 _ 3 PEAK= 1 . 1 CFS @ 12 . 04 HRS . 2 VOLUME= . 06 AF . 1 0 .0m +n 0 n m Ln m m LA m n m m r rl d T In n 0 r- � - - r r--TIME Chours) �- ,ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems �UBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= . 9 CFS @ 12 . 04 HRS, VOLUME= . 05 AF ACRES CN SCS TR-20 METHOD . 19 98 PARKING LOT TYPE III 24-HOUR . 21 74 LAWN-GOOD-C RAINFALL= 3 . 1 IN .40 85 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) LR-55 SHEET FLOW Segment ID: 1 . 7 zrass : Short n= . 15 L=25 ' P2=3 . 1 in s= . 1 ' / ' TR-55 SHEET FLOW Segment ID: .4 Smooth surfaces n= . 011 L=25 ' P2=3 . 1 in s= . 02 ' / ' ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 9 Paved Kv=20 . 3282 L=150' s= . 02 ' / ' V=2 . 87 fps Total Length= 200 ft Total Tc= 3 . 0 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 . S5 .80 AREA= . 4 AC Tc= 3 MIN 65 CN= 85 60 .58 SCS TR-20 METHOD 45 TYPE III 24-HOUR .48 RAINFALL= 3 . 1 IN 3 .35 2e PEAK= . 9 CFS LL .20 @ 12 .04 HRS . 15 UOLUME= . 85 AF . 05 © . Da m n, m d- to In w `TIME Chours) ,ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN prepared by David E. Ross Associates, Inc . 21 Jul 95 'ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems '_EACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = .4 CFS @ 12 .43 HRS, VOLUME= . 07 AF Qout= .4 CFS @ 12 . 50 HRS, VOLUME= . 07 AF, ATTEN= 10, LAG= 4 .4 MIN DEPTH END AREA DISCH (FT) (SQ-FT) (CFS) 2 ' x 1 ' CHANNEL PEAK DEPTH= 23 FT TH=TRANS N METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 9 ' / ' PEAK . 1 .2 . 1 n= . 1 PEAK VELOCITY= . 8 FPS . 2 .4 .3 LENGTH= 115 FT TRAVEL TIME = 2 . 5 MIN . 3 . 6 .5 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= . 02 HRS .4 . 9 . 9 . 6 1 . 2 1 . 5 . 8 1 .7 2 . 3 1 . 0 2 . 1 3 . 2 REACH 1 DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN .9 �r 8 r .7 �- .5 . 4 w 3 2' x t ' CHANNEL SIDE SLOPE= 9 '/' n= . 1 L= 115' S= . 024 i i O .gym N T �D 80 m N d' tD CO m N d- �O CO m DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN -repared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems REACH 1 INFLOW & OUTFLOW SWALE BETWEEN WETLAND AND CATCHBASIN . .33 4 %SOR-IND+TRANS 2' x 1 ' CHANNEL .30 SIDE SLOPE= 9 26 . 1 L=115' S= . 024 . 24 METHOD .20 i UELOCITY= . 8 FPS TRAVEL= 2 . 5 MIN 3 14 � 10 gin= . 4 CFS . 08 gout= . 4 CFS .06 - r LAG= 4 . 4 MIN 02 0 .00 r BBC u� m Ln m in m Ln CD Ltd m LA N N m n Ln 0 TIME (hours) ,ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems 'OND 1 AREA OF PONDING ABOVE PARKING LOT Qin = .5 CFS @ 12 . 23 HRS, VOLUME= . 04 AF Qout= .4 CFS @ 12 .43 HRS, VOLUME= .07 AF, ATTEN= 26%, LAG= 11 . 9 MIN ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (AC) (AF) (AF) PEAK STORAGE = . 01 AF 243 . 5 . 01 0 . 00 0 . 00 PEAK ELEVATION= 244 . 2 FT 244 . 0 . 01 . 01 . 01 FLOOD ELEVATION= 245 . 0 FT 244 . 1 . 01 0 . 00 . 01 START ELEVATION= 243 .5 FT 245 . 0 . 08 . 04 . 05 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 244 . 1 ' 5 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 . 79, 2 . 93, 3 . 06, 0, 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs_ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 6 . 7 . 8 . 9 243 . 5 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 .00 .44 1 . 25 2 .29 244 . 5 ( 3 .53 4 . 93 6 .55 8 .33 10 . 28 12 . 39 POND 1 DISCHARGE AREA OF PONDING ABOUE PARKING LOT 245 . 0 244 . 9 - _ - 244 . 5 244 .7 244 . 6 4- 244 .5 - 244 . 4 244 . .3 Q 244 . 21 '' 5� _ BROAD-CRESTED RECTANGULAR WEIR 244 . 0 w 243 .9 w 243 . 8 243 .7 243 . 6 243 . DISCHARGE (cfs) -ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND i INFLOW & OUTFLOW AREA OF PONDING ABOUE PARKING LOT 45 STOR-IND METHOD . 48 PEAK STOR= . 01 AF . 35 , PEAK ELEU= 244 . 2 FT r � . 30 ,� Qin= . 5 CFS . 25 �� Qoui= . 4 CFS 3 20 + l ____---LAG= 11. 9 _MIN. . 15 10 i .05 + i e . a 110 Ln m n m �n m �n m m m — — N CV m rq i- it Ln Isl tD — — TIME (hours) �- )ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 lydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems 'OND 2 CATCHBASIN 4 Qin = 1 . 8 CFS @ 12 . 09 HRS, VOLUME= . 18 AF Qout= 1 . 8 CFS @ 12 . 09 HRS, VOLUME= . 18 AF, ATTEN= Oo, LAG= 1 MIN ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 10 CF 237 . 2 13 0 0 PEAK ELEVATION= 238 . 0 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 .4 FT 241 . 3 4 4 51 START ELEVATION= 237 .2 FT 241 .4 100 5 56 SPAN= 10-16 HRS, dt= . 02 HRS 242 . 4 200 150 206 # ROUTE INVERT OUTLET DEVICES -- 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' 5= . 0091 / ' Ke= . S Cc= . 9 Cd= . 6 2 P 241 .3 ' 30 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 .2 . 3 .4 . 5 .6 . 7 . 8 . 9 237 .2 0 . 0 0 . 0 . 1 . 3 . 6 . 8 1 .2 1 . 5 1 . 9 2 . 2 238 . 2 2 . 5 2 . 8 3 . 0 3 . 1 3 . 0 3 . 1 3 .2 3 . 3 3 .4 3 . 5 239 . 2 3 . 6 3 . 6 3 . 7 3 . 8 3 . 9 4 . 0 4 . 0 4 . 1 4 . 2 4 . 3 240 . 2 4 . 3 4 .4 4 . 5 4 . 5 4 . 6 4 . 7 4 . 7 4 . 8 4 . 8 4 . 9 241 .2 5 . 0 5 . 0 7 . 6 12 . 2 18 . 1 25 . 2 33 .1 42 . 1 51 . 9 62 .5 242 . 2 73 . 9 86 . 0 98 . 4 111 .4 POND 2 DISCHARGE CATCHBASIN 4 J-1 ood_ e I eu .- - - - - - _ - - 242 . 2 --- 241 . 7 3SI -$ROAD-CRESTED RECTANGULAR WEIR 241 . 2 i - - - - - - - - - - - - - - - 240 .7 240 . 2 - FO 239 . 7 Q 239 . 2 w 238 . 7 - t w 238 . 2 -11 237 .71 12" CULUERT 237 .2m m m m m m m m m m m m N r'7 IT Li l tD (� M M m DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems POND 2 INFLOW & OUTFLOW CATCHBASIN 4 1 . 8 1 . 7 STOR-IND METHOD 1 .6 PEAK STOR= 10 CF 1 .4 PEAK ELEU= 238 FT 1 . 3 1 . 2 u 1 .0 Gin= 1 . 8 CFS Qout= 1 . 8 CFS 0 8 LAG= . 1 MIN 3 7 ° . 6 � .5 4 - . 3 .2 1 -r 0 0© LO m n LO m m rn m m N m m V Lid LC a tD r � ^ TII"1E (hour-s) � r-- ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 3 CATCHBASIN 6 Qin = 1 . 1 CFS @ 12 . 03 HRS, VOLUME= . 06 AF Qout= 1 . 1 CFS @ 12 . 04 HRS, VOLUME= . 06 AF, ATTEN= 0%, LAG= . 1 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 11 CF 235 . 8 13 0 0 PEAK ELEVATION= 236 . 6 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 .5 FT 239 .4 4 4 45 START ELEVATION= 235 .8 FT 240 . 0 2600 781 826 SPAN= 10-16 HRS, dt= . 02 HRS 240 . 5 7600 2550 3376 ROUTE INVERT OUTLET DEVICES 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' 5= . 0017 ' /' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 .5 . 6 . 7 . 8 . 9 235 . 8 0 . 00 . 02 . 07 . 16 . 28 .44 . 62 . 82 1 . 04 1 . 26 236 . 8 1 .47 1 . 67 1 . 82 1 . 88 1 . 93 2 . 08 2 .22 2 . 36 2 .48 2 . 60 237 . 8 2 . 72 2 . 83 2 . 93 3 . 04 3 . 14 3 . 23 3 .33 3 .42 3 .51 3 . 59 238 . 8 3 . 68 3 . 76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 . 22 4 . 29 4 . 36 239 . 8 4 .43 4 . 50 4 . 57 4 . 64 4 . 70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 24x . 3 i 239 . 8 i 239 . 3 238 .8 if 238 . 3 237 . 8 237 . 3 w y� w 236 . 8 - 12" CULUERT 235 . 8V CD in m Ln m Ln m Ln m to CD N N r'1 m d IT DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 3 INFLOW & OUTFLOW CATCHBASIN 6 1 . 1 1 . 8 STOR-IND METHOD 9 PEAK STOR= 11 CF 8 PEAK ELEU= 236 . 6 FT C . 7 Oin= 1 . 1 CFS . 6 Gout= 1 . 1 CFS 3 . 5 LAG= . 1 MIN O . 4 J LL . 3 . z 1 �- e .�m T — — TIME (hours) I tta for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 l 7droCAD 4 00 000736 (c),.. 1986-1995 Applied Microcomputer Systems )ND 4 CATCHBASIN 2 Qin = 3 . 8 CFS @ 12 . 05 HRS, VOLUME= . 29 AF ')out= 3 . 8 CFS @ 12 . 05 HRS, VOLUME= . 29 AF, ATTEN= 0%, LAG= 0 . 0 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 22 CF 235 . 5 13 0 0 PEAK ELEVATION= 237 . 2 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 .0 FT 240 . 3 4 4 60 START ELEVATION= 235 . 5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= . 02 HRS _# ROUTE INVERT OUTLET DEVICES 1 P 235 . 5' 12" CULVERT n= . 015 L=30' 5= . 01 ' 1 ' Ke= . 5 Cc=. 9 Cd= . 6 2 P 240 . 3 ' 25 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 4 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 .5 . 6 .7 . 8 . 9 235 . 5 0 . 00 . 03 .14 . 31 .53 . 80 1 . 09 1 .41 1 .74 2 . 07 236 . 5 2 .39 2 . 69 2 .94 3 . 08 3 . 18 3 .40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 . 34 4 .50 4 .66 4 . 81 4 . 96 5 .10 5 .24 5 . 38 5 .51 5 . 64 238 . 5 5 . 77 5 . 89 6 . 02 6 . 13 6 .25 6 . 37 6 .48 6 . 59 6 .70 6 . 81 239 . 5 6 . 91 7 .01 7 .12 7 . 22 7 . 32 7 .42 7 .51 7 . 61 7 . 70 9 . 87 240 . 5 13 . 75 18 . 74 24 .64 31 . 32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHBASIN 2 241 - 0 - _ _���_------- 240 .5 25' B QA_D---CRESTED_ RECTANGULAR WEIR 240 .0 ; 239 . 5 - 239 .0 238 . 5 238 . a - <L 237 .5 1 w 237 .0 ' r w 236 .5 - // 236 .07/ 12" CULUERT 235 . 5 in m to m to m in m LO DISCHARGE (cfs) )ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 lydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 4 INFLOW & OUTFLOW CATCHBASIN 2 3 .8 3 :6 STOR-IND METHOD 3 , 2 - PERK STOR= 22 CF 3 .0 - 2 .8 PEAK ELEU= 237 . 2 FT 2 .6 2 . 4 Oin= 3 . 8 US c 2 .2 U 2 .0 Qout= 3. 8 CF5 1 .8 LAG= 0 MIN 0 1 .4 J 1 . 2 LL . 2 O ©m LO m LO m try o �, in m m CS) m — — N N r9 rte, N3- v- L�) n 0 T-- .--- �- — TIME C hours 7 ata for DEVELOPMENT ASSOCIATES; 2-YEAR EXISTING-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 . 1 IN prepared by David E . Ross Associates, Inc . 21 Jul 95 4droCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems __ POND 5 DISCHARGE CATCHBASIN 3 Pr i sPctot. 240 .7 ~~J i 248 . 5 r - 240 . 3 &�GAf-_CRESTED_ RECTANGULAR _WEIR_ sec +' 240 . 1 239 .9 � 239 .7 0 239 .5 H 239 . 3 239 . 1 238 .9 w 238 . 7 r w 238 .5 1 238 .3 238 . 1 12" CULVERT pr,i 237 .9mLA m , m inminmnoinminm ry N m m Ir v D in w w r- r` m DISCHARGE (cfs) POND 5 INFLOW & OUTFLOW CATCHBASIN 3 .85 .85 STOR-IND METHOD 78 PEAK STOR= 6 CF .65 PEAK ELEV= 238 . 4 FT . 60 Cl- .5D Q i n= . 9 CFS U Qout= . 9 CFS . 45 30 Qpri = . 9 CFS 0 . 35 - 30 Qsec= 0. 0 CFS J LAG= . 1 MIN L` . 20 - . 15 . 10 05 0 .8 Om m L-) m m m m � d- ISM m �0 TIME (I-,ours) {{I �. i I I j I i j I I l 1 f P 1 1 I 1 1 >1 I 1 1 I i !� 1 10-YEAR EXISTING DAVID E. ROSS ASSOCIATES, INC. P.O. Bog 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN prepared by David E. Ross Associates, Inc . 23 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied microcomputer Systems ATERSHED ROUTING Q 50 0 a o 0 Q 0 . o J--�O 0 SUBCATCHMENT [] REACH A POND �� LINK )ata for DEVELOPMENT ASSOCIATES; 10-YEAR. EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 IydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 4.5 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS 3UBCAT AREA Tc WGT'D PEAK Tpeak VOL NUMBER (ACRE) (MIN) GROUND COVERS (%CN) -- CN C (CFS) (HRS) (AF) 1 .76 15 . 7 95%70 5089 - - 71 - 1 . 1 12 . 22 .09 2 . 67 7 . 0 21098 55%98 16089 7%77 95 - 2 . 7 12 . 09 . 17 3 .42 2 . 9 33%98 33%98 33%74 - 90 - 1 . 8 12 . 03 . 09 4 .42 2 . 9 5%98 55%98 290-04 12%77 89 - 1 . 8 12 . 03 . 09 5 .40 3 . 0 48098 53%74 - - 85 - 1 . 5 12 . 04 . 08 )ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E . Ross Associates, Inc . 21 Jul 95 iydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK NO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) (FT/FT) (FPS) (MIN) (CFS) 1 - 2 . 0 1 . 0 9 . 00 9 . 00 . 100 115 . 0240 1 . 1 1 . 8 1 . 0 rata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E . Ross Associates, Inc . 21 Jul 95 fydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK ------ PEAK FLOW ------- -- -Qout- -- NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. LAG (FT) (FT) (FT) (AF) (CFS) (CFS) (CFS) (CFS) (a) (MIN) 1 243 . 5 245 . 0 244 . 3 . 01 1 . 1 1 . 0 8 4 .3 2 237 . 2 242 .4 238 .4 0 . 00 3 . 0 3 . 0 0 . 1 3 235 . 8 240 . 5 237 . 0 0 . 00 1 . 8 1 . 8 0 .2 4 235 .5 241 . 0 238 . 8 0 . 00 6 . 1 6 . 1 0 . 2 5 237 . 9 241 . 0 238 . 6 0 . 00 1 . 5 1 . 5 1 . 5 0 . 1 ,ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00, 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= 1 . 1 CFS @ 12 .22 HRS, VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR . 04 89 DIRT PILE RAINFALL= 4 . 5 IN . 76 71 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tr-- (min) :'R.-55 SHEET FLOW Segment ID: 7 . 6 loods : Light underbrush n= .4 L=50 ' P2=3 . 1 in s= . 07 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 8 . 1 Forest w/Heavy Litter Kv=2 .5 L=320 ' s= . 07 ' / ' V= . 66 fps Total Length= 370 ft Total Tc= 15 . 7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABOUE PARKING LOT 1 . 1 1 . Q AREA= .76 AC 9 Tc= 15 . 7 MIN 8 CN= 71 7 SCS TR-20 METHOD U .6 TYPE III 24-HOUR .5 RAINFALL= 4 .5 IN 0 4 3 PEAK= 1 . 1 CFS @ 12 .22 HRS .2 VOLUME= . 89 AF . 1 0 .0 to m Ln m to m to 0 to m to m CD O - - N N M M IT d LO Ln l.Q TIME (hours) ,ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7 121 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems -IUBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 2 . 7 CFS @ 12 . 09 HRS, VOLUME= . 17 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 37 98 PARKING LOT RAINFALL= 4 . 5 IN . 11 89 DIRT PILES, GRAVEL/DIRT AREA SPAN= 10-16 HRS, dt= . 02 HRS 05 77 BRUSH/WEED MIX- POOR- C . 67 95 7ethod Comment Tc (min) -fR-55 SHEET FLOW Segment ID: 5 . 5 Woods : Light underbrush n= .4 L=40' P2=3 . 1 in s= . 1 ' / ' M-55 SHEET FLOW Segment ID: 2 Smooth surfaces n= . 011 L=10 ' P2=3 . 1 in s= . 03 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 .3 ?aved Kv=20 .3282 L=210 ' s= . 017 ' / ' V=2 . 65 fps Total Length= 260 ft Total Tc= 7 . 0 SUBCATCHMENT 2 RUNOFF DRAINAGE AREA TO CATCHBASIN 4 2 . 6 AREA= . 67 AC 2 .4 Tc-- 7 MIN 2 . 2 2 . @ CN= 95 1 .8 SCS TR-20 METHOD 14 TYPE III 24-HOUR 3 12 RAINFALL= 4 . 5 IN PEAK= 2. 7 CFS 6 @ 12 .09 HRS 4 VOLUME= . 17 OF . 2 "f O Nm in m Lc� m o m Lc� m Ln m o m m m - - N N rq M V d- LO n lD r � � - TIME (hours) ,ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ;UBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 4 . 5 IN . 14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS .42 90 lethod Comment Tc (min) ..M-55 SHEET FLOW Segment ID: 1 .4 Grass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 '?R-55 SHEET FLOW Segment ID: • 7 smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 jHALLOW CONCENTRATED/UPLAND FLOW Segment ID: . 8 Paved Kv=20 . 3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 . 9 SUBCATCHMENT S RUNOFF DRAINAGE AREA TO CATCHBASIN 6 1 .� 1 .7 AREA= . 42 AC 1. 5 Tc= 2 . 9 MIN 1 . 4 CN= 90 12 . SCS TR-20 METHOD L) 1 . � TYPE III 24-HOUR . g RAINFALL= 4 . 5 IN 3 7 O -1 S PEAK= 1 . 8 CFS .4 @ 12 .03 HRS . 2 VOLUME= . 09 AF 1 O . Om m m m [n m m m © - N N M M I- T ISM n t.D TIME (hours) � r ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcomputer Systems UBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR . 23 98 PAVEMENT RAINFALL= 4 .5 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C .42 89 4ethod Comment Tc (min) TR-55 SHEET FLOW Segment ID: 1 . 1 Smooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 ' / ' %HALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 8 Paved Kv=20 . 3282 L=200 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 250 ft Total Tc= 2 . 9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 1 .7 1 .6 AREA= . 42 AC 1 .5 Tc= 2 . 9 MIN 1 . 4 CN= 89 1 .3 1 . 1 SCS TR-20 METHOD 1 .0 TYPE III 24-HOUR .8 RAINFALL= 4 . 5 IN 3 7 .65 - PEAK= 1 . 8 CFS .4 @ 12 .03 HRS 2 UOLUME= . 09 AF . 1 0 .0m Lo m L m L() m pct UI) to m m m m - cv c�1 M M TIME (hours) )ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E . Ross Associates, Inc . 21 Jul 95 [vdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ;UBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= 1 . 5 CFS @ 12 . 04 HRS, VOLUME= . 08 AF ACRES CN SCS TR-20 METHOD . 19 98 PARKING LOT TYPE III 24-HOUR . 21 74 LAWN-GOOD-C RAINFALL= 4 . 5 IN .40 85 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) TR.-55 SHEET FLOW Segment ID: 1 . 7 grass : Short n= . 15 L=25 ' P2=3 . 1 in s= . 1 ' / ' TR-55 SHEET FLOW Segment ID: •4 Smooth surfaces n= . 011 L=25' P2=3 . 1 in s= . 02 ' / ' ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: 9 Paved Kv=20 . 3282 L=150' s= . 02 ' / ' V=2 . 87 fps Total Length= 200 ft Total Tc= 3 . 0 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 1 . 5 - 1 . 4 AREA= . 4 AC 1 '3 Tc= 3 MIN 1 .2 CN= 85 1 . 1 ^ 1 .0 .g SCS TR-20 METHOD . 8 TYPE III 24-HOUR 7 RAINFALL= 4 . 5 IN 3 . 6 0 -� 5 PEAK= 1 . 5 CFS LL . 4 @ 12 .04 HRS 3 UOLUME= DS AF .2 1 D Dm m in m in m tt� m in m in m N M M dT d- ISM r l0 ,-- r- - TIME Chours) ►ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 (ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems )EACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = 1 . 0 CFS @ 12 .29 HRS, VOLUME= . 10 AF Qout= 1 . 0 CFS @ 12 . 34 HRS, VOLUME= . 10 AF, ATTEN= 10, LAG= 3 . 1 MIN DEPTH END AREA DISCH (FT) (SO-FT) (CFS) 2 ' x 1 ' CHANNEL STOR-IND+TRANS METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 9 ' / ' PEAK DEPTH= .46 FT . 1 . 2 .1 n= . 1 PEAK VELOCITY= 1 . 1 FPS . 2 .4 .3 LENGTH= 115 FT TRAVEL TIME = 1 . 8 MIN . 3 . 6 .5 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= . 02 HRS .4 . 9 . 9 . 6 1 . 2 1 .5 . 8 1 . 7 2 . 3 1 . 0 2 . 1 3 .2 REACH 1 DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN 1 .0 -' . 9 , J pp s U � i v 5 . 4 w . 3 .' 2' x 1 ' CHANNEL 2 SIDE SLOPE= 9 '/' n= . 1 L=115' S= . 024 i i 0 . 1�CD N d- �D CO m N 'T �D CQ m N d m m . . . . . . . . . . . . . . . . N N N N N m DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Drepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00-- 000736 (c) 1986-1995 Applied Microcomputer Systems REACH 1 INFLOW & OUTFLOW SWALE BETWEEN WETLAND AND CATCHBASIN 9 + �� 2' x 1 ' CHANNEL S SIDE SLOPE= 9 'f' n= . 1 L=115' S= . 024 6 f ySTOR-IND+TRANS METHOD �` UELOCITY= 1 . 1 FPS 5 TRAVEL= 1 . 8 MIN 3 Q i n= 1 . 0 CFS + Qout= 1 . 0 CFS 2 ! LAG= 3 . 1 MIN 1 r r B . Bm U) 0 Ln © Ln m M m Ln CD Ln m m Qi -- N N m m tt d- ISM n "Q r � � — r- TIME (hours) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 1 AREA OF PONDING ABOVE PARKING LOT Qin = 1 . 1 CFS @ 12 . 22 HRS, VOLUME= . 09 AF Qout= 1 . 0 CFS @ 12 . 29 HRS, VOLUME= . 10 AF, ATTEN= 80, LAG= 4 . 3 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (AC) (AF) (AF) PEAK STORAGE = . 01 AF 243 . 5 . 01 0 . 00 0 . 00 PEAK ELEVATION= 244 .3 FT 244 . 0 . 01 . 01 . 01 FLOOD ELEVATION= 245 . 0 FT 244 . 1 . 01 0 . 00 . 01 START ELEVATION= 243 . 5 FT 245 . 0 . 08 . 04 . 05 SPAN= 10-16 HRS, dt= . 02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 244 . 1 ' 5' BROAD-CRESTED RECTANGULAR WEIR Q=C L H^1 . 5 C=2 . 79, 2 . 93 , 3 . 06, 0, 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 • 7 • 8 • 9 243 . 5 ( 0 .00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 .44 1 . 25 2 . 29 244 . 5 I 3 .53 4 . 93 6 . 55 8 . 33 10 . 28 12 . 39 POND 1 DISCHARGE AREA OF PONDING ABOUE PARKING LOT 245 .0 244 .9 - _ 244 .5 244 .7 244 .6 4 244 .5 `J 244 . 4 - - ? 244 .3 244 .2 1 ,f 5' _ BR0AD-CRE5TED_ RECTANGULAR WEIR 244 .0 w 243 .9 w 243 .8 243 .7 243 . 6 243 . DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Trepared by David E . Ross Associates, Inc. 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 1 INFLOW & OUTFLOW AREA OF PONDING ABOUE PARKING LOT 1 . 1 1 . 8 STOR-IND METHOD PEAK STOR= . 01 AF r t PEAK ELEU= 244 . 3 FT g i � . 7 r Qin= 1 . 1 CFS t+- r Ll . 6 'y Qout= 1 . 0 CFS . 5 LAG= 4 . 3 MIN 0 4 r LL- . 3 J \' 1 � z ' 1 r� 0 . 0 Ln m LCD m Ln m Ln m Ln m Ln m m m �i c� �_� r� v d Ln Ln �.o TIME (hours) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 2 CATCHBASIN 4 Qin = 3 . 0 CFS @ 12 . 09 HRS, VOLUME= . 27 AF Qout= 3 . 0 CFS @ 12. 10 HRS, VOLUME= . 27 AF, ATTEN= Oo, LAG= . 1 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 16 CF 237 . 2 13 0 0 PEAK ELEVATION= 238 .4 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 .4 FT 241 .3 4 4 51 START ELEVATION= 237 . 2 FT 241 .4 100 5 56 SPAN= 10-16 HRS, dt= .02 HRS 242 .4 200 150 206 ROUTE INVERT OUTLET DEVICES 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' 5= . 0091 / ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 241 . 3 ' 30' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 2 0 . 0 0 .0 . 1 . 3 . 6 . 8 1 . 2 1 .5 1 . 9 2 . 2 238 .2 2 .5 2 . 8 3 . 0 3 . 1 3 . 0 3 . 1 3 . 2 3 . 3 3 .4 3 . 5 239 .2 3 . 6 3 . 6 3 . 7 3 . 8 3 . 9 4 . 0 4 . 0 4 . 1 4 . 2 4 . 3 240 . 2 4 . 3 4 .4 4 . 5 4 . 5 4 . 6 4 . 7 4 . 7 4 . 8 4 . 8 4 . 9 241 . 2 5 . 0 5 . 0 7 . 6 12 . 2 18 . 1 25 . 2 33 . 1 42 . 1 51 . 9 62 . 5 242 . 2 73 . 9 86 . 0 98 . 4 111 .4 POND 2 DISCHARGE CATCHBASIN 4 J-1 ood_ e I ev .- - - _ - - - - _ 242 . 2 - 241 . 7 3' 1=-BROAD-CRESTED- - RECTANGULAR LJEIR r-. 241 . 2 t - - - - - - - - - - - 240 .7 240 . 2 ° 239 . 7 - 1 Q 239 . 2 w 238 . 7 - 1 w 238 . 2 -11 237 . 71 CUL ERT 237 . 2m m m m m m m m m m m m n �D r-- cn rn m - DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied MicrocoMputer Systems POND 2 INFLOW & OUTFLOW CATCHBASIN 4 3 .a - 2 .8 - STOR-IND METHOD 2 .6 PEAK STDR= 16 CF 2 . 4 PEAK ELEU= 238 .4 FT 2 .2 2 . 0 Qin= 3 . 0 CFS 0 1 .6 Qout= 3 . 0 CFS 1 .4 LAG= . 1 MIN 3 1 .2 1 .0 - LL a - -6 - . 4 .2 a .Om Ln m to m to m Ln 0 Ln m to m TIME (hours) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems -OND 3 CATCHBASIN 6 Qin = 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF Qout= 1 . 8 CFS @ 12 .04 HRS, VOLUME= . 09 AF, ATTEN= O's, LAG= 2 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 15 CF 235 . 8 13 0 0 PEAK ELEVATION= 237 . 0 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 . 5 FT 239 . 4 4 4 45 START ELEVATION= 235 . 8 FT 240 . 0 2600 781 826 SPAN= 10-16 HRS, dt= .02 HRS 240 . 5 7600 2550 3376 # ROUTE INVERT OUTLET DEVICES -- 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' S= . 0017 ' / ' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs- ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 .5 . 6 . 7 . 8 . 9 235 . 8 0 . 00 . 02 . 07 . 16 . 28 .44 . 62 . 82 1 . 04 1 . 26 236 . 8 1 .47 1 . 67 1 . 82 1 . 88 1 . 93 2 . 08 2 . 22 2 . 36 2 .48 2 . 60 237 . 8 2 . 72 2 . 83 2 . 93 3 . 04 3 . 14 3 . 23 3 . 33 3 .42 3 . 51 3 . 59 238 . 8 3 . 68 3 . 76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 . 22 4 . 29 4 . 36 239 . 8 4 .43 4 .50 4 . 57 4 . 64 4 .70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 240 . 3 i 239 . 5 239 . 3 238 .8 y 0 238 . 3 fJ 237 . 5 237 . 3 -" w w 236 . 8 236 . 3 - ---- 235 . 12" CULUERT Sm in m n m m in LO DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E . Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 1 Ih,IFLOW & OUTFLOW CATCHDASIN 6 1 .0 1 . 7 - STOR-IND METHOD 1 .5 PEAK STOR= 15 CF 1 . 4 PEAK ELEU= 237 FT 1 . 3 1 . 2 U 1 10 0 1 n= 1 . 8 CFS 9 Qout= 1 . 8 CFS g LAG= . 2 MIN 0 ' 7. � 6 .5 . 4 . 3 2 . 1 0 . 00 Lo m Ln m Ln m LA m Ln m to m CS) m — — N RI F9 m T Ln LO tD TIME (hours) l ita for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR. RAINFALL= 4.5 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 idroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems DND 4 CATCHBASIN 2 Qin = 6 . 1 CFS @ 12 . 05 HRS, VOLUME= . 45 AF ')out= 6 . 1 CFS @ 12 . 06 HRS, VOLUME= . 45 AF, ATTEN= 0%, LAG= 2 MIN ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 43 CF 235 . 5 13 0 0 PEAK ELEVATION= 238 . 8 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 . 0 FT 240 . 3 4 4 60 START ELEVATION= 235 .5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 235 . 5 ' 12" CULVERT n= . 015 L=30' S= . 0111 ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 240 . 3 ' 25' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 .5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 4 TOTAL DISCHARGE (CFS) vs. ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 235 . 5 0 . 00 . 03 . 14 . 31 . 53 . 80 1 . 09 1 .41 1 .74 2 . 07 236 . 5 2 . 39 2 . 69 2 . 94 3 . 08 3 . 18 3 .40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 . 34 4 . 50 4 . 66 4 . 81 4 . 96 5 . 10 5 .24 5 . 38 5 . 51 5 . 64 238 . 5 5 . 77 5 . 89 6 . 02 6 . 13 6 . 25 6 . 37 6 .48 6 .59 6 . 70 6 . 81 239 . 5 6 . 91 7 . 01 7 .12 7 . 22 7 . 32 7 . 42 7 . 51 7 . 61 7 . 70 9 . 87 240 .5 13 . 75 18 . 74 24 . 64 31 .32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHBASIN 2 241 . 0 _ _ ��----- � 240 . 5 25' BR j AD-ERESTE- RECTANGULAR L1EIR 240 . 0 2.39 . 5 239 .0 z 233 . 5 238 . 0 it 237 . 5 Li 237 . 8 1 w 236 .5 - /' 236 . 0 / 12,11 CULUERT 2-15 - 50L-- Ln m Ln m Ln m Ln m Lo DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E . Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 4 INFLOW & OUTFLOW CATCHBASIN 2 6 . 0 5 .5 STOR-IND METHOD 5 . 0 PEAK STOR= 43 CF 4 .5 PEAK ELEV= 238 .0 FT 4 . e u 3 5 Gin= 6 . 1 CF5 3 e Gout.= 6. 1 CFS 3 2 .5 LAG-- . 2 MIN 2 . 0 1 .5 - 1 .0 - . 5 - �- O . Om Ln m m c9 m Lfl m m CS m Ltd LO lD TIME (hours) ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ,ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems IOND 5 CATCHBASIN 3 Qin = 1 . 5 CFS @ 12 . 04 HRS, VOLUME= . 08 AF QOut= 1 . 5 CFS @ 12 . 04 HRS, VOLUME= . 08 AF, ATTEN= O's, LAG= 1 MIN Qpri= 1 . 5 CFS @ 12 .04 HRS, VOLUME= . 08 AF Qsec= 0 . 0 CFS @ 0 . 00 HRS, VOLUME= 0 . 00 AF ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 9 CF 237 . 9 13 0 0 PEAK ELEVATION= 238 . 6 FT 239 . 7 13 23 23 FLOOD ELEVATION= 241 . 0 FT 240 . 2 4 4 28 START ELEVATION= 237 . 9 FT 241 . 0 1020 410 437 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 237 . 9 ' 12" CULVERT n= . 015 L=45 ' S= . 0455 ' / ' Ke= . 5 Cc= . 9 Cd= . 6 2 S 240 .2 ' 40' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 Primary Discharge I-1=Culvert Secondary Discharge �-2=Broad-Crested Rectangular Weir POND 5 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 .2 .3 .4 . 5 . 6 . 7 . 8 .9 237 . 9 0 . 00 . 04 . 17 . 37 . 63 . 94 1 . 30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 .31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 8 . 52 14 . 72 22 . 70 32 . 12 42 . 78 54 . 79 240 . 9 67 . 92 82 . 11 POND 5 PRIMARY DISCHARGE (CFS) vs ELEVATION FEET 0. 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 .00 . 04 . 17 . 37 . 63 . 94 1 . 30 1 . 67 2 . 05 2 .40 238 . 9 2 .67 2 . 93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 5 . 21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 240 . 9 5 . 98 6 . 09 POND 5 SECONDARY DISCHARGE (CFS) ys ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 .9 237 . 9 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 238 . 9 0 .00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 239 . 9 0 .00 0 . 00 0 . 00 0 .00 3 . 31 9 . 37 17 . 22 26 . 51 37 . 05 48 . 93 240 . 9 61 .94 76 . 02 ata for DEVELOPMENT ASSOCIATES; 10-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems FOND 5 DISCHARGE CATCHBASIN 3 pr i sectot. 240 .9 240 .7 i - 240 . 5 r _- 240 . 3 ,-&�_O1qq-CRESTED_ RECTANGULAR _WEIR_ sec +' 240 - 1 - 239 . 9 t 239.7 , 0 239 .5 it H 239 . 3 '- 239 . 1 r Q 238 .9 � w 238 . 7 -t w 238 -511 238 . 3 238 . 1 12'' CULVERT pr,, 2 3 7 .9O Ln m n m cn m ,n m Ln m In m to m Ln m N N m m v T fn to 0 0 f r CO DISCHARGE (cfs) POND 5 INFLOW & OUTFLOW CATCHBASIN 3 1 .5 - 1 .4 STOR-IND METHOD 1 . 3 PEAK STOR= 9 CF 1 .2 PEAK ELEU= 238 . 6 FT 1 . 1 c- . 9 Din= 1 . 5 CFS 8 Qout= 1 . 5 CFS .7 Qpri= 1 . 5 CFS 3 . 6 Qsec= 0 . 0 CFS 0 5 4 LAG= . 1 MIN . 3 . 2 1 D Ln m n m Ln m Ln 0 D m lS) m N r'7 m d In Lid UO TIME (hours) f I J I J f J l 1 I J J J t f Y ,.� I .. II 1 ,. 1 ,. ,. ,. 100-YEAR EXISTING DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E . Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ATERSHED ROUTING A 15\ z 3 4 0 SUBCATCHMENT R REACH Q POND LINK rata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 'ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 6 .4 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS 'UBCAT AREA Tc WGT'D PEAK Tpeak VOL JfUMBER (ACRE) (MIN) GROUND COVERS (%CN) -- CN C (CFS) (HRS) (AF) 1 . 76 15 . 7 95%70 5%89 - - 71 - 2 . 1 12 . 21 . 16 2 . 67 7 . 0 21%98 55%98 16%89 7%77 95 - 4 . 0 12 . 09 .24 3 .42 2 . 9 33%98 33%98 33%74 - 90 - 2 . 7 12 . 03 .14 4 .42 2 . 9 5%98 55%98 29%74 12%77 89 - 2 . 7 12 . 03 .14 5 .40 3 . 0 48%98 53%74 - - 85 - 2 .4 12 . 04 . 12 ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK NO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) (FT/FT) (FPS) (MIN) (CFS) 1 - 2 . 0 1 . 0 9 . 00 9 . 00 . 100 115 . 0240 1 . 3 1 .4 2 . 0 ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK ------ PEAK FLOW -- ----- ---QOut--- NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. LAG (FT) (FT) (FT) (AF) (CFS) (CFS) (CFS) (CFS) M (MIN) 1 243 . 5 245 . 0 244 .4 . 02 2 . 1 2 . 0 5 3 . 2 2 237 . 2 242 .4 241 . 0 0 . 00 4 . 8 4 . 8 0 . 3 3 235 . 8 240 . 5 237 . 8 0 . 00 2 . 7 2 . 7 0 .3 4 235 . 5 241 . 0 240 .4 0 . 00 9 . 4 9 . 3 1 1 . 1 5 237 . 9 241 . 0 238 . 8 0 . 00 2 .4 2 .4 2 .4 0 . 1 ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 d oCAD 4 . 00 000736 c 1986-1995 applied Microcomputer Systems :UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= 2 . 1 CFS @ 12 . 21 HRS, VOLUME= .16 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR . 04 89 DIRT PILE RAINFALL= 6 .4 IN . 76 71 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tr- (min) Z'R-55 SHEET FLOW Segment ID: 7 . 6 goods : Light underbrush n= . 4 L=50 ' P2=3 . 1 in s= . 07 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 8 . 1 Forest w/Heavy Litter Kv=2 . 5 L=320 ' s= . 07 ' / ' V= . 66 fps Total Length= 370 ft Total Tc= 15 . 7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABOUE PARKING LOT 2 . 0 AREA= . 76 AC 1 . 8 - Tc= 15 . 7 MIN 1 . 6 CN= 71 1 . 4 SCS TR-20 METHOD 1 . 2 TYPE III 24-HOUR RAINFALL= 6 . 4 IN 3 8 © 6 PEAK= 2 . 1 CFS 4 @ 12 . 21 HRS UOLUME= 16 AF . 2 O . Om LA m Ln m LO m LA m in in m CD m LD n l0 r TIME (hours) ita for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 ✓droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems JBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 4 . 0 CFS @ 12 . 09 HRS, VOLUME= . 24 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 37 98 PARKING LOT RAINFALL= 6 .4 IN . 11 89 DIRT PILES, GRAVEL/DIRT AREA SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED MIX- POOR- C . 67 95 ethod Comment Tc (min) TR-55 SHEET FLOW Segment ID: 5 . 5 woods : Light underbrush n= .4 L=40 ' P2=3 . 1 in s= . 1 ' / ' R-55 SHEET FLOW Segment ID: . 2 omooth surfaces n= . 011 L=10 ' P2=3 . 1 in s= . 03 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 3 aved Kv=20 . 3282 L=210 ' s= . 017 ' / ' V=2 . 65 fps Total Length= 260 ft Total Tc= 7 . 0 SUBCATCHMENT 2 RUNOFF q DRAINAGE AREA TO CATCHBASIN 4 3 . 6 AREA= .67 AC 3 ' Tc= 7 MIN 3 . CN= 95 to 2 . SCS TR-20 METHOD 2 :0 TYPE III 24-HOUR 1 .0 RAINFALL= 6 . 4 IN 6 o .4 � j PEAK-- 4 . 0 CFS @ 12 .09 HRS 4 VOLUME= . 24 OF : 4 8 .8 Ln m to m to m Ln cD Ln m Ln o CS) 0 - - N N M M rt d- n n tjo TIME (hours) >ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 IydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ;UBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 2 . 7 CFS @ 12 . 03 HRS, VOLUME= . 14 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 6 .4 IN . 14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS .42 90 Method Comment Tc (min) CR-55 SHEET FLOW Segment ID: 1 .4 17rass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 TR-55 SHEET FLOW Segment ID: • 7 Smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 8 Paved Kv=20 .3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 . 9 SUBCATCHMENT 3 RUNOFF DRAINAGE AREA TO CATCHBASIN 6 2 . 4 AREA= . 42 AC 2 . 2 Tc= 2. 9 MIN 2 .0 - CN= 90 1 6 SCS TR-20 METHOD u 1 . 4 TYPE III 24-HOUR 1 . 2 RAINFALL= 6 . 4 IN 0 1 . 0 . g PEAK= 2. 7 CFS 6 @ 12 . 03 HRS . 4 UOLUME= . 14 AF . 2 O . Om U) m to m Ln m n m Ln m Ln m CD m Ln k-0 r - - T TIME (hours) T � � T ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems `UBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 2 . 7 CFS @ 12 . 03 HRS, VOLUME= . 14 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR . 23 98 PAVEMENT RAINFALL= 6 .4 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C! . 42 89 lethod Comment Tc (min) TR-55 SHEET FLOW Segment ID: 1 . 1 Smooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 HALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 8 -,aved Kv=20 . 3282 L=200 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 250 ft Total Tc= 2 . 9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 2 . 6 2 .4 AREA= . 42 AC 2 . 2 Tc= 2 . 9 MIN 2 .8 CN= 89 1 .8 c� 1 .6 SCS TR-20 METHOD ;' 1 .4 TYPE III 24-HOUR 1 .2 RAINFALL= 6 . 4 IN a 1 .0 . 8 PEAK= 2 . 7 CFS 6 @ 12 . 03 HRS .4 VOLUME= . 14 AF .2 © em LCl m LCD m l� m LCl m LCl m LCl m r- TIME (hours) )ata for DEVELOPMENT ASS0CIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ldroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ;UBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= 2 .4 CFS @ 12 . 04 HRS, VOLUME= . 12 AF ACRES CN SCS TR-20 METHOD . 19 98 PARKING LOT TYPE III 24-HOUR . 21 74 LAWN-GOOD-C RAINFALL= 6 .4 IN .40 85 SPAN= 10-16 HRS, dt= .02 HRS Method Comment Tr-. (min) ,R-55 SHEET FLOW Segment ID: 1 .7 grass : Short n= . 15 L=25 ' P2=3 . 1 in s= . 1 TR-55 SHEET FLOW Segment ID: .4 Smooth surfaces n= . 011 L=25 ' P2=3 . 1 in s= . 02 )"HALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 9 ,laved Kv=20 .3282 L=150 ' s= . 02 ' / ' V=2 . 87 fps Total Length= 200 ft Total Tc= 3 .0 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 2 2 AREA= . 4 AC 2 .8 Tc= 3 MIN 1 . 8 CN= 85 1 4 SCS TR-20 METHOD 1 2 TYPE III 24-HOUR 3 1 D RAINFALL= 6 . 4 IN 0 8 6 PEAK= 2. 4 CFS @ 12 .04 HRS . 4 UOLUME= . 12 AF 2 8 . 0 LA m LA m LA m n m LA m n m d- LO Ise l0 TIME (hour-5) � � T �- )ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 lydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems '.EACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = 2 .0 CFS @ 12 .26 HRS, VOLUME= . 16 AF Qout= 2 .0 CFS @ 12 .31 HRS, VOLUME= . 16 AF, ATTEN= 10, LAG= 2 . 6 MIN DEPTH END AREA DISCH (FT) (SO-FT) (CFS) 2 ' x 1 ' CHANNEL STOR-IND+TRANS METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 9 ' / ' PEAK DEPTH= . 72 FT . 1 . 2 . 1 n= . 1 PEAK VELOCITY= 1 . 3 FPS . 2 .4 .3 LENGTH= 115 FT TRAVEL TIME = 1 .4 MIN . 3 . 6 . 5 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= . 02 HRS .4 . 9 .9 . 6 1 .2 1 .5 . 8 1 . 7 2 . 3 1 . 0 2 . 1 3 .2 REACH 1 DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN .9 y .8 n .7 +1 4.. 5 i . 4 w . 3 2' x 1 ' CHANNEL 2 ' SIDE SLOPE= 9 '/' n= . 1 L= 115' S= . 024 i 0 ,0 / N d" �D m CD N d' LD CD m N � 0 OD m t� - - - - N N N N N r'1 DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 vdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH 1 INFLOW & OUTFLOW SWALE BETWEEN (WETLAND AND CATCHBASIN 0 1 g ri 2' x 1 ' CHANNEL SIDE SLOPE= 9 '/' n= . 1 L=115' 5= . 024 1 . 4 i c, 1 . 2 + ,ISTOR-IND+TRANS METHOD v 1 0 i y UELOCITY= 1 . 3 FPS 0 TRAVEL= 1 . 4 MIN B LL 6 f � Q i n= 2 . 0 CFS 4 r! Qout= 2 . 0 CFS LAG= 2 . 6 MIN . 2 mLn m n o in m 0 m - - N N m m d- � n r l0 — r TIME (hous) r )ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 lydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems nOND 1 AREA OF PONDING ABOVE PARKING LOT Qin = 2 . 1 CFS @ 12 . 21 HRS, VOLUME= . 16 AF Qout= 2 . 0 CFS @ 12 . 26 HRS, VOLUME= . 16 AF, ATTEN= 5%, LAG= 3 . 2 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (AC) (AF) (AF) PEAK STORAGE _ . 02 AF 243 . 5 . 01 0 . 00 0 . 00 PEAK ELEVATION= 244 .4 FT 244 . 0 . 01 . 01 . 01 FLOOD ELEVATION= 245 . 0 FT 244 . 1 . 01 0 . 00 . 01 START ELEVATION= 243 .5 FT 245 . 0 . 08 . 04 . 05 SPAN= 10-16 HRS, dt= . 02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 244 . 1 ' 5 ' BROAD-CRESTED RECTANGULAR. WEIR Q=C L H"1 .5 C=2 . 79, 2 . 93, 3 . 06, 0, 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 243 . 5 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 .44 1 . 25 2 . 29 244 . 5 I 3 . 53 4 . 93 6 .55 8 . 33 10 . 28 12 . 39 POND 1 DISCHARGE AREA OF PONDING ABOUE PARKING LOT 245 . 0 244 . 9 - 244 .8 - _- 244 . 7 -� 244 .6 - r-- 4 244 . 5 J 244 .4 z 249 . 3 244 j , 5' BROAD-CRESTED RECTANGULAR WEIR 244 . 0 w 243 . 9 w 243 . 8 - 243 .7 243 . 6 243 . 5m iv d r a� rn m cv DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems _ POND 1 INFLOW & OUTFLOW AREA OF PONDING ABOVE PARKING LOT 2 .8 +�s STOR-IND METHOD PEAK STOR= . 02 AF 1 .6 y PEAK ELEV= 244 . 4 FT \ 2 i\ Qin= 2 . 1 CFS U t Qout= 2 . 0 CFS 1 0 \ LAG= 3 . 2 MIN � r \ 0 8 \ J 1 t 6 1 \ f � . 4 r 0 .0 m +n o Ln m L-) m +n m +n m in m m — N N m m 'T 1- In n \o TIME (hours) ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E . Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems -OND 2 CATCHBASIN 4 Qin = 4 . 8 CFS @ 12 . 10 HRS, VOLUME= .40 AF Qout= 4 . 8 CFS @ 12 . 10 HRS, VOLUME= .40 AF, ATTEN= Oo, LAG= . 3 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 48 CF 237 .2 13 0 0 PEAK ELEVATION= 241 . 0 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 .4 FT 241 . 3 4 4 51 START ELEVATION= 237 .2 FT 241 .4 100 5 56 SPAN= 10-16 HRS, dt= . 02 HRS 242 .4 200 150 206 ROUTE INVERT OUTLET DEVICES 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' 5= . 0091 / ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 241 . 3 ' 30' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 .1 . 2 .3 .4 .5 . 6 . 7 . 8 . 9 237 .2 0 . 0 0 . 0 . 1 . 3 . 6 . 8 1 .2 1 .5 1 .9 2 . 2 238 .2 2 . 5 2 . 8 3 . 0 3 . 1 3 . 0 3 . 1 3 . 2 3 . 3 3 .4 3 . 5 239 .2 3 . 6 3 . 6 3 . 7 3 . 8 3 . 9 4 . 0 4 .0 4 . 1 4 . 2 4 . 3 240 . 2 4 . 3 4 .4 4 . 5 4 .5 4 . 6 4 . 7 4 .7 4 . 8 4 . 8 4 . 9 241 .2 5 . 0 5 . 0 7 . 6 12 .2 18 . 1 25 . 2 33 . 1 42 . 1 51 . 9 62 . 5 242 . 2 73 . 9 86 . 0 98 .4 111 .4 POND 2 DISCHARGE CATCHBASIN 4 J-1 0o d_ e I e v .- _ _ - - - - - - 242 .2 241 . 7 3S3=-BR6AD-CRESTED RECTANGULAR WEIR 241 . 2 1 - - - - - - - - - - - 248 . 7 z 240 . 2 ° 239 7 Q 239 .2 w 233 . ? w 238 .2 -) 237 . 7 12" CUL ERT 237 .20 0 m m m m m m 0 m cu M v n Lo r M m m DISCHARGE (cfs) ita for DEVELOPMENT ASSOCIATES;10O-YEAR. EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6.4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 idroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 2 INFLOW & OUTFLOW CATC:HBAS IN 4 4 .5 STOR-IND METHOD 4 .0 PERK STOR= 48 CF 3 . 5 PEAK ELEU= 241 FT 3 . 0 Din= 4 . 8 CF5 2 .5 Qout= 4 . 8 CF5 3 2 .8 LAG= . 3 MIN a J 1 . 5 1 .0 - .5 0 .0 CD Ln m n m L(7 m m m Ln m Ln m CS) @ CV RI m 1-9 It q- LO LCD 110 TIME (hours) ,ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E . Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems BOND 3 CATCHBASIN 6 Qin = 2 . 7 CFS @ 12 . 03 HRS, VOLUME= . 14 AF Qout= 2 . 7 CFS @ 12 . 04 HRS, VOLUME= . 14 AF, ATTEN= 0%, LAG= .3 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 26 CF 235 . 8 13 0 0 PEAK ELEVATION= 237 . 8 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 . 5 FT 239 .4 4 4 45 START ELEVATION= 235 . 8 FT 240 . 0 2600 781 826 SPAN= 10-16 HRS, dt= . 02 HRS 240 . 5 7600 2550 3376 ROUTE INVERT OUTLET DEVICES 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' 5= . 00171 / ' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 . 9 235 . 8 0 . 00 . 02 . 07 . 16 . 28 .44 . 62 . 82 1 . 04 1 . 26 236 . 8 1 . 47 1 . 67 1 . 82 1 . 88 1 . 93 2 . 08 2 . 22 2 . 36 2 .48 2 . 60 237 . 8 2 . 72 2 . 83 2 . 93 3 . 04 3 . 14 3 . 23 3 .33 3 .42 3 . 51 3 . 59 238 . 8 3 . 68 3 .76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 . 22 4 . 29 4 . 36 239 . 8 4 .43 4 .50 4 . 57 4 . 64 4 . 70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 240 . 3 239 . 8 239 . 3 238 .8 zo 238 . 3 ��`• 237 . 8 Q 237 . 3 - Li .' w X36 . 8 - 236 . 3 - 12" gULUERT 235 . 8V CD in m LO m Ln m LC) m U-) DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 3 INFLOW & OUTFLOW CATCHBASIN 6 2 . 6 2 . 4 STOR-IND METHOD 2 . 2 - PEAK STOR= 26 CF 2 . 0 PEAK ELEV= 237 . 8 FT 4-- 1 .6 Q i n= 2 . 7 CF5 1 . 4 Uout= 2. 7 CF5 1 . 2 LAG= . 3 MIN 0 1 . 0 -i 8 6 . 4 . 2 © . Om to m LO o LO m to m �n m N m m 'T V ISM n 0 TIME (hours) ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems 'BOND 4 CATCHBASIN 2 Qin = 9 .4 CFS @ 12 . 05 HRS, VOLUME= . 69 AF Qout= 9 . 3 CFS @ 12 . 07 HRS, VOLUME= . 69 AF, ATTEN= 10, LAG= 1 . 1 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 147 CF 235 . 5 13 0 0 PEAK ELEVATION= 240 .4 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 . 0 FT 240 . 3 4 4 60 START ELEVATION= 235 .5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= . 02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 235 . 5 ' 12" CULVERT n= . 015 L=30 ' 5= . 0111 ' Ke= .5 Cc= . 9 Cd= . 6 2 P 240 .3 ' 25 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 .62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 4 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 .2 .3 .4 .5 . 6 . 7 . 8 . 9 235 . 5 0 . 00 . 03 . 14 .31 . 53 . 80 1 . 09 1 .41 1 .74 2 . 07 236 . 5 2 . 39 2 . 69 2 . 94 3 . 08 3 . 18 3 .40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 . 34 4 . 50 4 . 66 4 . 81 4 . 96 5 . 10 5 . 24 5 . 38 5 .51 5 . 64 238 . 5 5 . 77 5 . 89 6 . 02 6 . 13 6 . 25 6 . 37 6 .48 6 . 59 6 . 70 6 . 81 239 . 5 6 . 91 7 . 01 7 . 12 7 .22 7 . 32 7 .42 7 . 51 7 . 61 7 . 70 9 . 87 240 .5 13 .75 18 . 74 24 . 64 31 .32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHBASIN 2 241 . 0 - _ ------------ 240 . 5 25' BR ,¢AD--CRESTE15_ RECTANGULAR WEIR 240 .0 239 . 5 v 239 . 0 z 238 .5 - CD 238 .0 11 <3: 23-7 .5 - '1 i D 237 . 0 r� w 236 -5 - /' 236 . 0 // f2" CULVERT 235 . 50 Ln m Ln m Ln m Ln m L DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 4 INFLOW 8 OUTFLOW CATCHBASIN 2 8 . 5 STOR-IND METHOD PEAK STOR= 147 CF 7 :8 PEAK ELEU= 240 . 4 FT 6 .5 .0 5 .5 Qin= 9. 4 CFS 4- 5 5 .0 Qout= 9 . 3 CFS 4 .5 LAG= 1 . 1 MIN 3 4 . 0 O 3 . 5 J 3 .@ 2 . 5 2 . 0 1 .5 - 1 .0 5 e Nm Ln m nE� Ln m m Ln m to m m m — N N l d LSD n w r- — TIME (hours) ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 vdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems -'OND 5 CATCHBASIN 3 Qin = 2 .4 CFS @ 12 . 04 HRS, VOLUME= . 12 AF Qout= 2 .4 CFS @ 12 . 04 HRS, VOLUME= . 12 AF, ATTEN= Oo, LAG= 1 MIN Qpri= 2 .4 CFS @ 12 . 04 HRS, VOLUME= . 12 AF Qsec= 0 . 0 CFS @ 0 . 00 HRS, VOLUME= 0 . 00 AF ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 12 CF 237 . 9 13 0 0 PEAK ELEVATION= 238 . 8 FT 239 . 7 13 23 23 FLOOD ELEVATION= 241 . 0 FT 240 . 2 4 4 28 START ELEVATION= 237 . 9 FT 241 . 0 1020 410 437 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 237 . 9 ' 12" CULVERT n= . 015 L=45 ' S= . 0455 ' / ' Ke= .5 Cc= . 9 Cd= . 6 2 S 240 . 2 ' 40' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 Primary Discharge I-1=Culvert Secondary Discharge �--2=Broad-Crested Rectangular Weir POND 5 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 .37 . 63 . 94 1 .30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 .38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 8 . 52 14 . 72 22 . 70 32 .12 42 . 78 54 . 79 240 . 9 67 . 92 82 . 11 POND 5 PRIMARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 .37 . 63 . 94 1 .30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 .38 3 . 59 3 . 78 3 . 96 4 .14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 5 . 21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 240 . 9 5 . 98 6 . 09 POND 5 SECONDARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 .9 237 . 9 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 238 . 9 0 . 00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 239 . 9 0 . 00 0 . 00 0 . 00 0 . 00 3 .31 9 .37 17 .22 26 . 51 37 . 05 48 . 93 240 . 9 61 .94 76 . 02 ata for DEVELOPMENT ASSOCIATES;100-YEAR EXISTING-REV7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 5 DISCHARGE CATCHBASIN 3 pr i sect.ot 240 . 9 240 .7 240 . 5 240 . 3 � C�=CRESTED RECTANGULAR WEIR sec +' 240 . 1 239 . 9 239 .7 1 0 239 . 5 it H 239 . 3 ~ 239 . 1 r 238 .9 - 1 w 238 . 7 -1 w 238 . 511 238 . 3 235 1 1 2'' CULVERT r i 237 . 9mLn m [c) mLn mLncD n0Ln0LomLo m CV N m m 7r V Ln Ltd Ld l0 h rl- CCU DISCHARGE Ccfs? POND 5 INFLOW & OUTFLOW CATCHBASIN 3 2 .4 2 .2 STOR-IND METHOD 2 .0 PEAK STOR= 12 CF 1 . 8 PEAK ELEU= 238 .8 FT + 1 .4 Qin= 2. 4 CFS 1 2 Qout= 2 . 4 CFS 1 .0 Gpri = 2. 4 CFS 0 8 Qsec= 0. 0 CFS � 6 LAG= . 1 MIN 4 . 2 0 .0m to m �n m m to m Ln m to o m m d d In Ln tD — — — TIME (hours) 1 f l i 1 � 1 ;� i r I i 'G f 1 I I i i 2—YEAR POSTDEVELOPMENT DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN prepared by David E. Ross Associates, Inc . 21 Jul 95 &roCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems %TERSHED ROUTING 6 ZL A5 Q2 F11 O Q \ 4 OSUBCATCHMENT R REACH APDND C� LINK ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Prepared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 3 .1 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS UBCAT AREA Tc WGT'D PEAK Tpeak VOL r4UMBER (ACRE) (MIN) GROUND COVERS (%CN) -- CN C (CFS) (HRS) (AF)_ 1 . 76 15 . 7 95070 5%77 - - 70 - .4 12 . 23 .04 2 . 51 3 . 9 27%98 69%98 4%74 - 97 - 1 . 6 12 . 05 . 09 3 . 42 2 . 9 33%98 33%98 33%74 - 90 - 1 . 1 12 . 03 . 06 4 .42 2 . 9 50198 55%98 29%74 12%77 89 - 1 . 1 12 . 04 . 06 5 . 39 2 . 9 74%98 26074 - - 92 - 1 . 1 12 . 03 . 06 6 . 17 4 . 3 94%98 6%74 - - 97 - . 5 12 . 05 . 03 ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 .1 IN 21 Jul 95 Drepared by David E. Ross Associates, Inc. droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK NO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) FT FT FPS MIN CFS 1 - 2 . 0 1 .0 2 . 00 2 . 00 . 100 95 . 0240 . 9 1 . 8 . 5 ] ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 Prepared by David E. Ross Associates, Inc . 7droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK ------ PEAK FLOW - ------ - --Qout--- - NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. LAG (FT) (FT) (FT) (AF) (CFS) (CFS) (CFS) (CFS) (o) (MIN 1 243 . 5 245 . 0 244 .4 . 02 .4 . 1 77 44 . 8 2 237 . 2 242 . 4 238 . 0 0 . 00 2 . 0 2 . 0 0 . 1 3 235 . 8 240. 5 236 . 6 0 . 00 1 . 1 1 . 1 0 . 1 4 235 . 5 241 . 0 237 .4 0 . 00 4 . 2 4 . 2 0 . 2 5 237 . 9 241 . 0 238 .4 0 . 00 1 . 1 1 . 1 1 . 1 0 . 1 ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Drepared by David E. Ross Associates, Inc . 21 Jul 95 YdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= .4 CFS @ 12 . 23 HRS, VOLUME= . 04 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR . 04 77 BRUSH/WEED MIX-POOR-C RAINFALL= 3 . 1 IN . 76 70 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) R-55 SHEET FLOW Segment ID: 7 . 6 oods : Light underbrush n= .4 L=50' P2=3 . 1 in s= . 07 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 8 . 1 Forest w/Heavy Litter Kv=2 . 5 L=320 ' s= . D7 ' / ' V= . 66 fps Total Length= 370 ft Total Tc= 15 .7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABODE PARKING LOT . 40 AREA= .76 AC . 35 Tc= 15 . 7 MIN CN= 7© 3e SCS TR-20 METHOD U . 25 TYPE III 24-HOUR .28 RAINFALL= 3 . 1 IN . 15 PEAK= . 4 CFS . 10 @ 12 . 23 HR5 05 © .00 i.n m LO m i.n m LO m Ln (S) LA m CD 0 - - N N M r'1 d- V n U) lD TIME (hours) ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 Prepared by David E . Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A om lied Microc uter Systems UBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 1 . 6 CFS @ 12 . 05 HRS, VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 35 98 PARKING LOT RAINFALL= 3 . 1 IN . 02 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 51 97 iethod Comment Tc (minim `R-55 SHEET FLOW Segment ID: 1 . 9 Woods : Light underbrush n= . 4 L=15 ' P2=3 . 1 in s= . 2 ' / ' 4 'PR.-55 SHEET FLOW Segment ID: smooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 05 ' / ' jHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 6 Paved Kv=20 . 3282 L=190 ' s= . 01 ' / ' V=2 . 03 fps Total Length= 245 ft Total Tc= 3 . 9 SUBCATCHMENT 2 RUNOFF DRAINAGE AREA TO CATCHBASIN 4 1 .6 1 .5 AREA= .51 AC 1 . 4 Tc= 3. 9 MIN 1 . 3 CN= 97 1 . 2 CO 1 . 0 SCS TR-20 METHOD 8 TYPE III 24-HOUR _ `J 7 RAINFALL= 3 . 1 IN 3 6 o . _j .5 PEAK- 1 . 6 CFS . 4 G 12 . 85 HRS 3 UOLUME= . 09 AF . 2 N M M d- d- LO It l 0 r ` T TIME (hours) i ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 prepared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 Applied Mic.roco Lnp uter Systems JBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 1 . 1 CFS @ 12 . 03 HRS, VOLUME= . 06 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 3 .1 IN . 14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS .42 90 ethod Comment Tr_ min R-55 SHEET FLOW Segment ID: 1 .4 Grass: Short n= . 15 L=20 ' P2=3 . 1 in s=. 1 ' / ' 7 1"R-55 SHEET FLOW Segment ID: mooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 ' / ' 8 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 . 3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 .9 SUBCATCHMENT 3 RUNOFF DRAINAGE AREA TO CATCHBASIN 6 1 . 1 1 AREA= . 42 AC 9 Tc= 2. 9 MIN CN= 90 8 .7 SCS TR-20 METHOD .6 TYPE III 24-HOUR RAINFALL= 3 . 1 IN 01 . 4 PEAK= 1 . 1 CFS L- . 3 @ 12 . 03 HRS UOLUME= . 06 AF 1 0 . Bm [f 11 m Ln m to m to m Ln m Ln m CD m - N N M M VT d- In In t0 TIME (hours) ] ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 Prepared by David E. Ross Associates, Inc . 7droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems JBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 1 . 1 CFS @ 12 . 04 HRS, VOLUME= . 06 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR . 23 98 PAVEMENT RAINFALL= 3 . 1 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C . 42 89 method Comment Tc min TR-55 SHEET FLOW Segment ID: 1 . 1 ^mooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 ' / ' 1 8 HALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 .3282 L=200 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 250 ft Total Tc= 2 . 9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 1 . 0 AREA= . 42 AC 9 Tc= 2 . 9 MIN CN= 89 . 7 SCS TR-20 METHOD . 6 TYPE III 24-HOUR 5 RAINFALL= 3 . 1 IN o . 3 PEAK= 1 . 1 CFS @ 12 . 04 HRS 2 UOLUME= . 06 AF 1 0 . 0 m Ln m m m m m m m m N N M m d 'qr Lo r k_n TIME (hours) ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 . 1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems JBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= 1 . 1 CFS @ 12 . 03 HRS, VOLUME= . 06 AF ACRES CN SCS TR-20 METHOD . 29 98 PARKING LOT TYPE III 24-HOUR . 10 74 LAWN-GOOD-C RAINFALL= 3 . 1 IN . 39 92 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) -R-55 SHEET FLOW Segment ID: 1 .4 rass: Short n= . 15 L=20' P2=3 . 1 in s= . l TR-55 SHEET FLOW Segment ID: . 3 Rmooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 05 HALLOW CONCENTRATED/UPLAND FLOW Segment ID: . 9 raved Kv=20 . 3282 L=110 ' s= . 01 ' / ' V=2 . 03 fps SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: . 3 aved Kv=20 . 3282 L=70 ' s= . 04 ' / ' V=4 . 07 fps Total Length= 230 ft Total Tc= 2 . 9 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 I . 1 1 .8 AREA= . 39 AC .9 Tc= 2 . 9 MIN CN= 92 7 SCS TR-20 METHOD U . 6 TYPE III 24-HOUR v 3 .5 RAINFALL= 3 . 1 IN 0 4 3 PEAK= 1 . 1 CFS 2 @ 12 . 03 HRS UOLUME= . 06 AF 1 �- TIME Chau,,rs) .- ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 Prepared by David E. Ross Associates, Inc. droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems UBCATCHMENT 6 RUNOFF FROM NEW PARKING AREA AT REAR PEAK= . 5 CFS @ 12 . 05 HRS, VOLUME= . 03 AF ACRES CN SCS TR-20 METHOD . 16 98 PARKING LOT TYPE III 24-HOUR . 01 74 LAWN-GOOD-C RAINFALL= 3 . 1 IN . 17 97 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min Method SHEET FLOW Segment ID: 3 . 2 loods: Dense underbrush n= . 8 L=10 ' P2=3 . 1 in s= . 1 ' / ' 5 TR-55 SHEET FLOW Segment ID: Smooth surfaces n= . 011 L=40' P2=3 . 1 in s= . 03 ' / ' 6 ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: t)aved Kv=20 . 3282 L=130 ' s= . 03 ' / ' V=3 . 52 fps --- -- - Total Length= 180 ft Total Tc= 4 . 3 SUBCATCHMENT 6 RUNOFF RUNOFF FROM NEW PARKING AREA AT REAR .50 AREA= . 17 AC .45 Tc= 4 . 3 MIN .47 CN= 97 .35 SCS TR-20 METHOD . 30 TYPE III 24-HOUR .25 RAINFALL= 3 . 1 IN o .20 _ 1J PEAK= 5 CFS 18 @ 12 . 75 HRS UOLUME= . 0.3 AF . 05 e .�10 m � m � mLn mLn CD LO mLn m m m N N t 1 7 d Ltd n �D TIME (hours) ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 .1 IN Prepared by David E . Ross Associates, Inc. 21 Jul 95 ldroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems . EACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = . 5 CFS @ 12 . 05 HRS, VOLUME= . 05 AF Qout= . 5 CFS @ 12 . 10 HRS, VOLUME= . 05 AF, ATTEN= 4% , LAG= 3 . 1 MIN _3PTH END AREA DISCH (FT) (SO-FT) (CFS) 2 ' x 1' CHANNEL STOR-IND+TRANS METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 2 ' / ' PEAK DEPTH= . 28 FT . 1 . 2 . 1 n= . 1 PEAK VELOCITY= . 9 FPS . 2 .4 . 3 LENGTH= 95 FT TRAVEL TIME = 1 . 8 MIN . 3 . 6 . 6 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= . 02 HRS .4 1 . 0 1 . 0 . 6 1 .4 1 . 8 . 8 1 . 9 2 . 8 1 . 0 2 . 5 4 . 0 REACH 1 DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN F J . 9 a .- -7 c} . 5 ` 't �- . 4 Lij -3 J�� 2' x 1 '. CHANNEL 2 i SIDE SLOPE= 2 '/' 1 �f n= . 1 L=95' S= . 024 i 8 .8m to m �� m t o m LA m CD m d DISCHARGE (cfs) )ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 . 1 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A lied m Microco titer Systems REACH 1 INFLOW & OUTFLOW SWALE BETWEEN WETLAND AND CATCHBASIN . 50 i 2' x 1 ' CHANNEL .45 �� SIDE SLOPE= 2 . 40 is n= . 1 L=95' S= . 024 14 35 , s STOR-IND+TRANS METHOD 38 + y VELOCITY= . 9 FPS . 25 r TRAVEL= 1 . 8 MIN 3 J.0 . 20 - I' �� � 15 Din= . 5 CFS r rkl ' 5 CFS i LAG= 3 . 1 MI 05 �,�. � m � m m m T IT TIME (houra) ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 .1 IN 21 Jul 95 Drepared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A pplied Microcomputer Systems AND 1 AREA OF PONDING ABOVE PARKING LOT Qin = .4 CFS @ 12 . 23 HRS, VOLUME= . 04 AF ')out= . 1 CFS @ 12 . 98 HRS, VOLUME= . 02 AF, ATTEN= 77%, LAG= 44 .8 MIN ELEVATION AREA INC.STOR CUM. STOR PEAK STORAGE HOD g30 CF 24343 .. 5 3 50 0 4(S (CF) (CF) PEAK ELEVATION= 244 .4 FT 3 243 . 9 500 170 170 FLOOD ELEVATION= 245 . 0 FT 244 . 0 600 55 225 START ELEVATION= 243 .5 FT 244 . 1 700 65 290 SPAN= 10-16 HRS, dt= . 02 HRS 245 . 0 3500 1890 2180 ROUTE INVERT OUTLET DEVICES 1 P 244 . 3 ' 2 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 79, 2 .93 , 3 . 06, 0, 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 243 . 5 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 . 18 244 . 5 I . 50 . 92 1 .41 1 . 97 2 . 62 3 . 33 POND 1 DISCHARGE AREA OF PONDING ABODE PARKING LOT 245 .0 _ 244 .9 244 .5 244 . 7 244 .6 - 244 .5 0 244. 3 �/2 _ BROAD-CRESTED RECTANGULAR WEIR 244 . 2 - 244 . 1 244 . 0 w 243 .9 w 243 . 8 243 .7 243 . 6 2143 .5 CD N T 0 CO m N V- ,0 M m N 't 0 M m N DISCHARGE Ccfs? ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 .1 IN Trepared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A m lied Microco uter Systems POND i INFLOW & OUTFLOI,,I AREA OF PONDING ABOUE PARKING LOT . 40JP STOR-IND METHOD 35 PEAK STOR= 830 CF AK ELEV= 244 . 4 FT Qin= . 4 CF5 u .25 Qou+-= . 1 CF5 . 28 LAG= 44 . 8 MIN 3 J . 15 LL 1 .05 0 .00 Ln m L0 0 Ln m m m d- T Ln Ln uo TIME (hours) ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN Trepared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems :)ND 2 CATCHBASIN 4 Qin = 2 . 0 CFS @ 12 . 06 HRS, VOLUME= . 14 AF )out= 2 . 0 CFS @ 12 . 06 HRS, VOLUME= . 14 AF, ATTEN= 0%, LAG= 1 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 11 CF 237 . 2 13 0 0 PEAK ELEVATION= 238 . 0 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 . 4 FT 241 . 3 4 4 51 START ELEVATION= 237 . 2 FT 241 .4 100 5 56 SPAN= 10-16 HRS, dt= . 02 HRS 242 .4 200 150 206 ROUTE INVERT OUTLET DEVICES 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' S= . 00911 ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 241 . 3 ' 30' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 2 0 . 0 0 . 0 . 1 .3 . 6 . 8 1 .2 1 . 5 1 . 9 2 . 2 238 . 2 2 .5 2 . 8 3 . 0 3 . 1 3 . 0 3 . 1 3 . 2 3 .3 3 .4 3 . 5 239 . 2 3 . 6 3 . 6 3 . 7 3 . 8 3 . 9 4 . 0 4 . 0 4 . 1 4 .2 4 . 3 240 . 2 4 . 3 4 .4 4 . 5 4 . 5 4 . 6 4 . 7 4 . 7 4 . 8 4 . 8 4 . 9 241 . 2 5 . 0 5 . 0 7 . 6 12 .2 18 . 1 25 .2 33 . 1 42 . 1 51 . 9 62 . 5 242 . 2 73 . 9 86 . 0 98 .4 111 .4 POND 2 DISCHARGE CATCHBASIN 4 _f_1 00d_ elev ._ - - - - - - - - 242 . 2 241 . 7 3jD_'-BROAD-CRESTED RECTANGULAR WEIR 241 . 2 i - - 240 .7 z 240 . 2 r ter' 239 . 7 1 Q 239 .2 w 238 . 7 - f w 238 . 2 -11 237 . 71 12" CULVERT 237 .m m m m m m m m m m m m ry rr, v Ln �0 r m m m DISCHARGE (cfs) ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 . 1 IN ' nrepared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied MicrocQm uter Systems POND 2 INFLOW & OUTFLOW CATCHDASIN 4 2 . e 1 STOR-IND METHOD 1 .6 - PEAK STOR= 11 CF PEAK ELEU= 258 FT 1 . 4 2 Oin= 2 . 0 CF5 v 1 . 0 - Gout= 2 - 0 CFS LAG= . 1 MIN 3 O J . 67 4 2 0 . m In @ LO. a T). © l) m U)_ Q. Ltd m CD 0 n LO 1-0 TIME (hours) Lita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 I -epared by David E. Ross Associates, Inc . I rdroCAD 4 . 00 000736 c 1986-1995 Applied Microcomputer Systems )ND 3 CATCHBASIN 6 Qin = 1 . 1 CFS @ 12 . 03 HRS, VOLUME= . 06 AF )out= 1 . 1 CFS @ 12 . 04 HRS, VOLUME= . 06 AF, ATTEN= Oo, LAG= 1 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 11 CF 235 . 8 13 0 0 PEAK ELEVATION= 236 . 6 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 . 5 FT 239 .4 4 4 45 START ELEVATION= 235 . 8 FT SPAN= 10-16 HRS, dt= . 02 HRS 240 . 0 2600 781 826 240 . 5 7600 2550 3376 ROUTE INVERT OUTLET DEVICES 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' 5= . 00171 / ' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 9 235 . 8 0 . 00 . 02 . 07 . 16 . 28 .44 . 62 . 82 1 . 04 1 . 26 236 . 8 1 . 47 1 . 67 1 . 82 1 . 88 . 04 3 .14 3 .023 3 .33 3 .42 3 . 51 237 . 8 2 . 72 2 . 83 2 . 93 3 3 . 59 238 . 8 3 . 68 3 . 76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 . 22 4 . 29 4 . 36 239 . 8 4 .43 4 .50 4 . 57 4 . 64 4 . 70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 240 . 3 j i 239 . 8 i� f 239 . 3 238 . 8 238 . 3 237 . 8 - �- w 237 . 3 " w 236 . 8 236 . 3 � 12" CULVERT 235 . 8CD n m if-) m Ln m tsi m N N m d d DISCHARGE (cfa) ata for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 -repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 Applied Microcom cater Systems FOND 3 INFLOW & OUTFLOW CATCHBASIN 6 1 . 1 1 0 STOR-IND METHOD 9 PEAK STOR= 11 CF 8 PEAK ELEU= 236 . 6 FT 0 . 7 Qin= 1 . 1 CFS U . 6 Qout= 1 . 1 CFS `J 5 LAG= . 1 MIN 3 o . 4 J Li- . 3 2 0 . 0m LA Lo m L m LO m LO 0. LO 0 0 m - N N m m IT d- n n 0 TIME (hours) L._ta for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 .1 IN 21 Jul 95 I `epared by David E. Ross Associates, Inc . I ,droCAD 4 . 00 000.736 (c)_ 1986- 995 Applied Microcom uter Systems I )ND 4 CATCHBASIN 2 Qin = 4 . 2 CFS @ 12 . 04 HRS, VOLUME= . 25 AF bout= 4 . 2 CFS @ 12 . 05 HRS, VOLUME= . 25 AF, ATTEN= 0%, LAG= . 2 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 25 CF 235 . 5 13 0 0 PEAK ELEVATION= 237 . 4 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 . 0 FT 240 . 3 4 4 60 START ELEVATION= 235 . 5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 p 235 . 5' 12" CULVERT n= . 015 L=30 ' 5= . 0111 ' Ke= .5 Cc= . 9 Cd= . 6 2 p 240 . 3 ' 25 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 62 , 2 . 68, 0, 0, 0, 0, 0, 0 POND 4 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 235 . 5 0 . 00 . 03 . 14 .31 . 53 . 80 1 . 09 1 .41 1 . 74 2 . 07 236 . 5 2 . 39 2 . 69 2 . 94 3 . 08 3 . 18 3 .40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 . 34 4 . 50 4 . 66 4 :83 6 , 25 6 . 307 6 .48 6 . 59 6 . 70 6 . 81 238 . 5 5 . 77 5 . 89 6 . 02 6 239 .5 6 . 91 7 . 01 7 . 12 7 . 22 7 . 32 7 .42 7 .51 7 . 61 7 . 70 9 . 87 240 . 5 13 . 75 18 . 74 24 . 64 31 .32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHBASIN 2 241 . 0 240 . 5 25' BR¢�D-£RESTED RECTANGULAR_ I�IEIR r - - - - - - 240 .0 - 239 . 5 239 . E 238 .5 238 . 0 - /1 237 .5 1 1 w 237 . 0 1 1 w 236 .5 236 .0 // 12" CULUERT 235 .5m Ln CD Ln m � m u� m Ln N N m fTl DISCHARGE (cfs) I ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 3 . 1 IN T -epared by David E. Ross Associates, Inc . 21 Jul 95 �droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems )ND 5 CATCHBASIN 3 Qin = 1 . 1 CFS @ 12 . 03 HRS, VOLUME= . 06 AF )out= 1 . 1 CFS @ 12 . 04 HRS, VOLUME= . 06 AF, ATTEN= 0%, LAG= . 1 MIN Zpri= 1 .1 CFS @ 12 . 04 HRS, VOLUME= . 06 AF Qsec= 0 . 0 CFS @ 0 .00 HRS, VOLUME= 0 . 00 AF 3LEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 7 CF 237 . 9 13 0 0 PEAK ELEVATION= 238 .4 FT 239 . 7 13 23 23 FLOOD ELEVATION= 241 . 0 FT 240 . 2 4 4 28 START ELEVATION= 237 . 9 FT 241 . 0 1020 410 437 SPAN= 10-16 HRS, dt= . 02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 237 . 9 ' 12" CULVERT n= . 015 L=45 ' S= . 0455 ' / ' Ke= . 5 Cc= . 9 Cd= . 6 2 S 240 . 2 ' 40' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 Primary Discharge I 1=Culvert Secondary Discharge �--2=Broad-Crested Rectangular Weir POND 5 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 .5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 .37 . 63 . 94 1 .30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 8 . 52 14 . 72 22 . 70 '32 . 12 42 . 78 54 . 79 240 . 9 67 . 92 82 . 11 POND 5 PRIMARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 .2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 . 37 . 63 . 94 1 .30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 5 . 21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 240 . 9 5 . 98 6 . 09 POND 5 SECONDARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 .1 . 2 . 3 .4 .5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 .00 0 . 00 238 . 9 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 239 . 9 0 . 00 0 . 00 0 . 00 0 . 00 3 . 31 9 . 37 17 .22 26 . 51 37 . 05 48 . 93 240 . 9 61 . 94 76 . 02 : ita for DEVELOPMENT ASSOCIATES; 2-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 3 .1 IN -repared by David E . Ross Associates, Inc . 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 5 DISCHARGE CATCHBASIN 3 p r i sectot 240 . 9 - 240 .7 - 240 . 5 240 . 3&PUA6-CRESTED RECTANGULAR WEIR sec 240 . 1 i 239 . 9 239 . 7 0 239 . 5 0 239 . 3 � 239 . 1 r Q 238 .9 w 238 . 7 r Li 238 . 5 -11 238 .3 238 . 1 12'' CULVERT ri 2 3 7 .9@ Ln m n o LCD m LA m d) m Ln G D m Ln m N N m m V ;I- n n Co DISCHARGE (cfs) POND 5 INFLOW & OUTFLOW CATCHBASIN 3 1 . 1 1 D STOR-IND METHOD 9 PEAK STOR= 7 CF r, 8 PEAK ELEU= 238 . 4 FT 0 7 Qin= 1 . 1 CFS U . 6 Qout= 1 . 1 CFS 5 up- j = 1 . 1 CF5 30 4 Qsec= 0 . 0 CF5 3 LAG= . 1 MIN .2 . 1 0 .0� to m t�� m to m Ln m Ln o to m m m — — N N m m d d- Ltd Ltd w r- - - - r .---TIME (hours) � 10-YEAR POSTDEVELOPMENT 4 DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 _ata for DEVELOPMENT ASSOCIATES; 10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN -'repared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems !ATERSHED ROUTING V Q 6 ,� O 2 o \ a o- OSUBCATCHMENT REACH POND LINK ata for DEVELOPMENT ASSOCIATES;10-YEAR. POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 " repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 (c)._ 1986-1995 Applied Microcomputer Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 4 .5 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS UBCAT AREA Tc WGT'D PEAK Tpeak VOL _NUMBER (ACRE) (MIN) --GROUND COVERS oCN -- CN C CFS HRS AF 1 . 76 15 . 7 95070 5077 - - 70 - 1 . 1 12 .22 . 08 2 . 51 3 . 9 27o98 69098 4074 97 - 2 .4 12 . 05 . 13 3 .42 2 . 9 33098 33098 33074 - 90 - 1 . 8 12 . 03 . 09 4 .42 2 . 9 5098 55098 29074 12077 89 - 1 . 8 12 . 03 . 09 5 . 39 2 . 9 74098 26074 - - 92 - 1 . 7 12 . 03 . 09 6 . 17 4 . 3 94098 6074 - - 97 - . 8 12 . 05 . 04 -ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 repared by David E . Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK NO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) FT FT FPS MIN CFS 1 - 2 . 0 1 . 0 2 . 00 2 :00 . 100 95 . 0240 1 . 0 1 .5 . 9 Lata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 repared by David E . Ross Associates, Inc . __ droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK ------ PEAK FLOW ------- ---Qout--- NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. MIN _ (FT) (FT) (FT) (AF) CFS CFS CFS CFS o 1 243 . 5 245 . 0 244 .5 . 03 1 . 1 . 7 35 13 .9 2 237 . 2 242 . 4 238 .4 0 . 00 3 . 0 3 . 0 0 .1 3 235 . 8 240 . 5 237 .0 0 . 00 1 . 8 1 . 8 0 .2 4 235 . 5 241 . 0 239 . 1 0 . 00 6 . 5 6 . 5 0 .2 5 237 . 9 241 . 0 238 . 6 0 . 00 1 . 7 1 . 8 1 . 8 0 . 1 -jata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 'repared by David E . Ross Associates, Inc . [ droCAD 4 . 00 000736 c 1986-1995 Applied Microcomputer Systems ;UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= 1 . 1 CFS @ 12 . 22 HRS, VOLUME= . 08 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR . 04 77 BRUSH/WEED MIX-POOR-C RAINFALL= 4 . 5 IN . 76 70 SPAN= 10-16 HRS, dt= .02 HRS Comment Tc (min) Method PR-55 SHEET FLOW Segment ID: 7 6 Moods: Light underbrush n= . 4 L=50 ' P2=3 .1 in s= . 07 8 .1 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: V= . 66 fps Forest w/Heavy Litter Kv=2 . 5 L=320 ' s= . 07 ' / ' P ---------- Total Length= 370 ft Total Tc= 15 .7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABOVE PARKING LOT 1 .0 AREA= . 76 AC . 9 Tc= 15 . 7 MIN g CN= 70 n 7 5CS TR-20 METHOD u . 6 TYPE III 24-HOUR .5 RAINFALL= 4 . 5 IN 3 4 3 PEAK= 1 . 1 CFS @ 12 . 22 HRS .2 VOLUME= . 08 OF . I - 0 .0@ Ln @ LC) m L() m Ln m LC) @ LCa m m m N N M r ) I- d LSD LC) TIME (Koura) j vata for DEVELOPMENT ASSOCIATES;10-YEAR. POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 repared by David E. Ross Associates, Inc. droCAD 4 . 00 000736 c 1986-1995 A m lied Microco uter Systems ;UBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 2 .4 CFS @ 12 . 05 HRS, VOLUME= . 13 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 35 98 PARKING LOT RAINFALL= 4 .5 IN 02 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 51 97 Method Comment Tc (min) �TR-55 SHEET FLOW Segment ID. 1 9 Woods : Light underbrush n= . 4 L=15 ' P2=3 . 1 in s= . 2 ' / ' 4 TR-55 SHEET FLOW Segment ID: Smooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 05 ' / ' 1 . 6 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 .3282 L=190 ' s= . 01 ' / ' V=2 . 03 fps Total Length= 245 ft Total Tc= 3 . 9 SUBCATCHMENT 2 RUNOFF DRAINAGE AREA TO CATCHBASIN 4 2 . 4 2 . 2 AREA= . 51 AC 2 .0 Tc= 3 . 9 MIN 1 . 8 CN= 97 1 4 SCS TR-20 METHOD u 1 2 TYPE III 24-HOUR 3 i 0 RAINFALL= 4 . 5 IN 0 8 PEAK= 2. 4 CFS L'- 6 @ 12 .05 HRS . 4 UOLUME= . 13 AF . 2 J_ 0 . 3 Ln m � m � m �n m in m m 0 CD - - N N M M d- d- ISM n 0 TIME (hours) .)ata for DEVELOPMENT ASS0CIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 ,repared by David E. Ross Associates, Inc. droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems ;UBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 1 . 8 CFS @ 12 . 03 HRS., VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 4 . 5 IN .14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS 42 90 Tc (min) Method Comment TR-55 SHEET FLOW Segment ID: 1 .4 Grass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 ' /' 7 PR-55 SHEET FLOW Segment ID: Smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 ' / ' 8 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 . 3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 . 9 SUBCATCHMENT 3 RUNOFF DRAINAGE AREA TO CATCHBASIN 6 1 . 6 1 .7 AREA= . 42 AC 1 . 6 1 . 5 Tc= 2. 9 MIN 1 . 4 CN= 90 _ 1 .3 " I .2 SCS TR-20 METHOD C" 1 .0 TYPE III 24-HOUR 9 RAINFALL= 4 . 5 IN 7 f o6 PEAK= 1 . 8 CFS LL .4 @ 12 .03 HRS 3 UOLUME= . 09 AF . 2 © 0 m m in m Ln m Ln m n m m m N N M M It d- TIME (hours) rata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 -Irepared by David E. Ross Associates, Inc . i droCAD 4 . 00 000736 c 1986-1995 A m lied Microco uter Systems ;UBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR . 23 98 PAVEMENT RAINFALL= 4 . 5 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C .42 89 Method Comment Tr, (min) TR-55 SHEET FLOW Segment ID: 1 . 1 Smooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 ' / ' 1 . 8 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 .3282 L=200 ' s= . 008 ' / ' V=1 . 82 fps --- --- Total Length= 250 ft Total Tc= 2 . 9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 1 .7 - 1 .6 AREA= . 42 AC 1 .5 Tc= 2 . 9 MIN 1 .4 CN= 87 I . I SCS TR-20 METHOD 1 .9 TYPE III 24-HOUR .8 RAINFALL= 4 . 5. IN 3 a 5 PEAK= 1 . 8 CFS LL 4 @ 12 . 03 HRS z UOLUME= . 09 AF mLO m n. m m m LD N N M M TIME (hours) jata- for DEVELOPMENT ASSOCIATES,•10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 'prepared by David E. Ross Associates, Inc. 21 Jul 95 [ droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems ;UBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= 1 . 7 CFS @ 12 . 03 HRS, VOLUME= . 09 AF ACRES CN SCS TR-20 METHOD . 29 98 PARKING LOT TYPE III 24-HOUR . 10 74 LAWN-GOOD-C RAINFALL= 4 .5 IN .39 92 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) CR-55 SHEET FLOW Segment ID: 1 .4 .-7rass : Short n= . 15 L=20 ' P2=3 . 1 in s= . l ' / ' TR-55 SHEET FLOW Segment ID: 3 Smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 05 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 9 Paved Kv=20 .3282 L=110 ' s= . 01 ' / ' V=2 . 03 fps SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 3 Paved Kv=20 . 3282 L=70 ' s= . 04 ' / ' V=4 . 07 fps Total Length= 230 ft Total Tc= 2 .9 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 1 .7 - 1 .6 AREA= . 39 AC 1 .5 Tc= 2 . 9 MIN 1 .4 CN= 92 1 .3 1 .2 1 .0 SCS TR-28 METHOD g TYPE III 24-HOUR 8 RAINFALL= 4 . 5 IN 3 7 O 6 PEAK= 1 . 7 CFS . 4 @ 12 .03 HRS 3 UOLUME= . 09 OF 1 -- O 0m Ln m J. to m to m to m m m N N M M d d LCD LCD �D TIME (hours,) -ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 'prepared by David E . Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems . ;UBCATCHMENT 6 RUNOFF FROM NEW PARKING AREA AT REAR PEAK= . 8 CFS @ 12 . 05 HRS, VOLUME= . 04 AF ACRES CN SCS TR-20 METHOD .16 98 PARKING LOT TYPE III 24-HOUR . 01 74 LAWN-GOOD-C RAINFALL= 4 . 5 IN . 17 97 SPAN= 10-16 HRS, dt=. 02 HRS Comment T(- (min) Method CR-55 SHEET FLOW Segment ID: 3 .2 Goods : Dense underbrush n= . 8 L=10 ' P2=3 . 1 in s= . 1 ' / ' TR-55 SHEET FLOW Segment ID: •5 Smooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 03 ' / ' 6 ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 .3282 L=130 ' s= . 03 ' / ' V=3 . 52 fps Total Length= 180 ft Total Tc= 4 .3 SUBCATCHMENT 6 RUNOFF RUNOFF FROM NEW PARKING AREA AT REAR .75 78 AREA= 17 AC 65 Tc= 4. 3 MIN .68 CN= 97 .55 .50 LRAINFALL=R-20 METHOD Ci- .4� III 24-HOUR `3 . 35 4 .5 IN 3 ..3 0 .25 EAK= . 8 CFS .20 @ 12 . 05 HRS . 15 UME= 04 AF . 1e .05 11 .000 Ln mtf) E) n cD L in m in m TIME (hours) ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 4 .5 IN -repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems .EACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = . 9 CFS @ 12 .40 HRS, VOLUME= . 11 AF Qout= . 9 CFS @ 12 .45 HRS, VOLUME= . 11 AF, ATTEN= 006, LAG= 2 . 7 MIN DEPTH END AREA DISCH (FT) (SO-FT) (CFS) 2 ' x 1 ' CHANNEL STOR-IND+TRANS METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 2 ' / ' PEAK DEPTH= .39 FT . 1 : 2 . 1 n= . 1 PEAK VELOCITY= 1 . 0 FPS . 2 .4 . 3 LENGTH= 95 FT TRAVEL TIME = 1 . 5 MIN . 3 . 6 . 6 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= . 02 HRS .4 1 . 0 1 . 0 . 6 1 . 4 1 . 8 . 8 1 . 9 2 . 8 1 . 0 2 . 5 4 . 0 REACH 1 DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN 1 . C� . 9 ' 7 6 .1 5 I l J f w . 3 � 2' x 1 ' CHANNEL SIDE SLOPE= 2 '/ ' n= . 1 L=95' S= . 024 J r 00 in m i c� m LI) m to 0 CD (u N m m d DISCHARGE (cfs) _ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 4 .5 IN repared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A lied m Microco uter Systems REACH 1 INFLOW & OUTFLOW SWALE BETWEEN WETLAND AND CATCHBASIN . 80 Ott 2' x 1 ' CHANNEL 75 i �t SIDE SLOPE= 2 n= . 1 L=95' 5= . 024 . 60 . 55 � �� 5 OR-IND+TRANS METHOD 0 50 i UELOCITY= 1 FPS . 45 . 40 i �� TRAVEL= 1 . 5 MIN 3 35 i of 25 � \�� U i n= - 9 CFS 20 i out= . 9 CF5 . i 5 LA N �� = .05 ---- yf © . 00� m �.n m m cv m m i d- Lo in �a TIME (hours) -ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A m lied Microco uter Systems OND 1 AREA OF PONDING ABOVE PARKING LOT Qin = 1 . 1 CFS @ 12 . 22 HRS, VOLUME= . 08 AF Qout= . 7 CFS @ 12 .45 HRS, VOLUME= . 06 AF, ATTEN= 35%, LAG= 13 . 9 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 1228 CF 243 . 5 350 0 0 PEAK ELEVATION= 244 . 5 FT 243 . 9 500 170 170 FLOOD ELEVATION= 245 . 0 FT 244 . 0 600 55 225 START ELEVATION= 243 . 5 FT 244 . 1 700 65 290 SPAN= 10-16 HRS, dt= . 02 HRS 245 . 0 3500 1890 2180 ROUTE INVERT OUTLET DEVICES 1 P 244 . 3 ' 2 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H^1 . 5 C=2 . 79, 2 . 93, 3 . 06, 0, 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 .1 . 2 . 3 .4 . 5 . 6 . 7 . 8 9 243 . 5 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 . 18 244 . 5 ` . 50 . 92 1 .41 1 . 97 2 . 62 3 . 33 POND 1 DISCHARGE AREA OF PONDING ABOVE PARKING LOT 245 .0 244 . 9 244 .8 244 . 7 244 .6 c 244 .5 J 244 .4 244 . 3 z'-, 2' BROAD-CRESTED- RECTANGULAR- LJEIR L - - - - - - - - - - - - - . 244 . 2 F- 244 . 1 - 244 . 0 w 243 .9 w 243 . 0 243 .7 243 . 6 243 .5mN � 0co mN 0co0NIT 0 9DCD N O - - N N N N N m m DISCHARGE (cfs) _ ata for DEVELOPMENT ASSOCIATES;10-YEAR. POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN -repared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A pplied ..MicrocMpute r Systems POND i INFLOW & OUTFLOW AREA OF PONDING ABOUE PARI-CING LOT 1 . 0 STQR-IND METHOD .9 PEAK STQR= 1228 CF g PEAK ELEV= 244 . 5 FT 7 r ` Qin= 1 . 1 CFS u 5 r �� Qout= . 7 CF5 . 5 �� LAG= 13 . 9 MIN 3 � l 0 4 J L� . 3 2 . L I � 1 ----- ---- r 0 96 LA m LC-) m Lid m LA 0 Lf1 m Ln m m m N N m m LS LS) lQ TIME (hours) _ata for DEVELOPMENT ASSOCIATES; 10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 repared by David E. Ross Associates, Inc. drOCAD 4 . 00 000736 c 1986 71995 Applied Microcomputer Systems OND 2 CATCHBASIN 4 Qin = 3 . 0 CFS @ 12 . 06 HRS, VOLUME= .24 AF QOut= 3 . 0 CFS @ 12 . 06 HRS, VOLUME= . 24 AF, ATTEN= 0%, LAG= . 1 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 16 CF 237 . 2 13 0 0 PEAK ELEVATION= 238 . 4 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 . 4 FT 241 . 3 4 4 51 START ELEVATION= 237 . 2 FT 241 . 4 100 5 56 SPAN= 10-16 HRS, dt= . 02 HRS 242 . 4 200 150 206 ROUTE INVERT OUTLET DEVICES 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' S= . 00911 ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 241 . 3 ' 30 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H^1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 1 2 3 4 5 6 7 . 8 1 237 . 2 0 . 0 0 . 0 . 1 . 3 . 6 . 8 1 .2 1 . 5 1 . 9 2 . 2 238 . 2 2 . 5 2 . 8 3 . 0 3 . 1 3 . 0 3 . 1 3 . 2 3 . 3 3 .4 3 . 5 239 . 2 3 . 6 3 . 6 3 . 7 3 . 8 3 . 9 4 . 0 4 . 0 4 . 1 4 .2 4 . 3 240 . 2 4 . 3 4 . 4 4 . 5 4 . 5 4 . 6 4 . 7 4 . 7 4 . 8 4 . 8 4 . 9 241 . 2 5 . 0 5 . 0 7 . 6 12 . 2 18 . 1 25 . 2 33 . 1 42 . 1 51 . 9 62 . 5 242 . 2 73 . 9 86 . 0 98 .4 111 .4 FOND 2 DISCHARGE CATCHBASIN 4 f_1 o o d_ e I e v .- - - - - - - - - -�- 242 . 2 241 . 7 3 241 . 2 3���- -BROAD-CRESTED RECTANGULAR WEIR 4-' - - - - - - - 240 . 7 z 240 . 2 ° 239 . 7 Q 239 .2 w 2.33 . 7 w 236 . 2 -11 237 . 7 12 CULVERT 237 . ?� m m m m m m m m m m m M v of m DISCHARGE (Gfs) ,ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4. 5 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 vdroCAD 4 . 00 000.736 (c) . 1986-1995 Applied Microcomputer Systems POND 2 INFLOW & OUTFLOW CATCHBPS II 14 3 . 0 2 . 8 STQR-IND METHOD 2 . 6 PEAK STQR= 16 CF 2 . 4 PEAK ELEU= 238 . 4 FT 2 . 2 2 . 0 4? I g Q i n= 3 . 0 CFS u 1 .6 Gout= 3 . 0 CFS J 1 . 4 LAG= . 1 MIN 1 . 2 0 1 0 . 6 .4 . 2 — 0 .e0 Ln m a o LD CD If) m in m Ln 0 m m C`I N m m d Ln Ln tD TIME (hours) T ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN -repared by David E . Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 (c) .1986-1995 Applied Microcom uter Systems 'OND 3 CATCHBASIN 6 Qin = 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF Qout= 1 . 8 CFS @ 12 . 04 HRS, VOLUME= . 09 AF, ATTEN= 0%, LAG= 2 MIN ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 15 CF 235 . 8 13 0 0 PEAK ELEVATION= 237 .0 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 .5 FT 239 .4 4 4 45 START ELEVATION= 235 . 8 FT 240 . 0 2600 781 826 SPAN= 10-16 HRS, dt= . 02 HRS 240 .5 7600 2550 3376 ROUTE INVERT OUTLET DEVICES 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' 5= . 00171 / ' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs , ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 235 . 8 0 . 00 . 02 . 07 . 16 . 28 .44 . 62 . 82 1 . 04 1 . 26 236 . 8 1 .47 1 . 67 1 . 82 1 . 88 1 . 93 2 . 08 2 . 22 2 .36 2 .48 2 . 60 237 . 8 2 . 72 2 . 83 2 . 93 3 . 04 3 .14 3 . 23 3 . 33 3 .42 3 . 51 3 . 59 238 . 8 3 . 68 3 . 76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 . 22 4 .29 4 . 36 239 . 8 4 .43 4 . 50 4 . 57 4 . 64 4 . 70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 240 . 3 - r� i 239 . 8 239 . 3 238 .8 J zo 238 .3 - 237 . 8 ' w 237 . 3 ,= w 230 . 8 _ 236 .3 f 12" CULUERT 235 . 8m n 0 in 0 in m try m L i CD N N m m It DISCHARGE (cfs) )ata for DEVELOPMENT ASSOCIATES; 10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 'prepared by David E. Ross Associates, Inc . 21 Jul 95 [,ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 3 INFLOLJ & OUTFLOlI CATCHBASIN 6 1 , 8 1 . 6 STOR-IND METHOD 1. 5 PEAK STOR= 15 CF 1 . 4 PEAK ELEU= 237 FT 1 . 3 1 . 2 C" 1. 0 Q i n= 1 . 8 CF5 9 Gout= 1 . 8 CF5 g LAG= . 2 MIN 3 7 ° .6 .5 . 4 . 3 .2 1 — e 0 C D m n CD T) m © in o m N r'1 M "t d- to r �O TIME (hours) ata for DEVELOPMENT ASSOCIATES; 10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN 21 Jul 95 Trepared by David E. Ross Associates, Inc. droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems 'OND 4 CATCHBASIN 2 Qin = 6 . 5 CFS @ 12 . 04 HRS, VOLUME= .42 AF Qout= 6 . 5 CFS @ 12 . 05 HRS, VOLUME= .42 AF, ATTEN= 0%, LAG= 2 MIN ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 47 CF 235 . 5 13 0 0 PEAK ELEVATION= 239 . 1 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 . 0 FT 240 . 3 4 4 60 START ELEVATION= 235 . 5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 235 . 5 ' 12" CULVERT n= . 015 L=30 ' S= . 0111' Ke= .5 Cc= . 9 Cd= . 6 2 P 240 .3 ' 25 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 62 , 2 . 68, 0, 0, 0, 0, 0, 0 POND 4 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 .8 . 9 235 .5 0 . 00 . 03 . 14 . 31 . 53 . 80 1 . 09 1 .41 1 . 74 2 . 07 236 . 5 2 .39 2 . 69 2 . 94 3 . 08 3 . 18 3 .40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 .34 4 . 50 4 . 66 4 . 81 4 . 96 5 . 10 5 . 24 5 .38 5. 51 5 . 64 238 .5 5 . 77 5 . 89 6 . 02 6 . 13 6 . 25 6 . 37 6 .48 6 . 59 6 . 70 6 . 81 239 .5 6 .91 7 . 01 7 . 12 7 . 22 7 . 32 7 .42 7 .51 7 . 61 7 . 70 9 . 87 240 .5 13 .75 18 . 74 24 . 64 31 . 32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHBASIN 2 241 .8 ___ v_- --- �� 240 . 5 25' BRA(- - - _RESTED RECTANGULAR - - 240 .0 - ,r 239 . 5 239 .0 rr 238 . 5 - r� 238 .0 - �r r--- � Q 237 .5 - i' w 23T@ - rr J w 236 .5 236 .0 // 12" CULUERT 235 .5m Ln m in m Ln m n m Lo N N m m V V DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4.5 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00 . 000736 (c) 1986-1995 Applied Microcomputer Systems POND � INFLOlj-I & OUTFLOIJ CATCHBASIN 2 6 . 5 6 .8 STOR-IND METHOD 5 .5 PEAL{ STOR= 47 CF 5 .8 PEAK ELEV= 239 . 1 FT 4 .0 Qin= 6 . 5 CFS t) 0 .5 Dout= 6. 5 CFS `J 3 .8 LAG= . 2 MIN 30 2 . 5 J 2 .0 - 1 .5 - 1 .0 5 0 .0 CD LA m Ln m Lo m LO m Ln m LO m CS) m - iii CSI m m If) LD 0 r TIME (hout-s) ata for DEVELOPMENT ASSOCIATES;10-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 4 .5 IN 21 Jul 95 "repared by David E . Ross Associates, Inc. droCAD 4 , 00 000736 c 1986-1995 Applied Microcom uter Systems OND 5 CATCHBASIN 3 Qin = 1 . 7 CFS @ 12 .03 HRS, VOLUME= . 09 AF Qout= 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF, ATTEN= 0-'6, LAG= 1 MIN Qpri= 1 . 8 CFS @ 12 . 03 HRS, VOLUME= . 09 AF Qsec= 0 . 0 CFS @ 0 . 00 HRS, VOLUME= 0 . 00 AF ELEVATION AREA INC .STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 9 CF 237 . 9 13 0 0 PEAK ELEVATION= 238 . 6 FT 239 . 7 13 23 23 FLOOD ELEVATION= 241 . 0 FT 240 .2 4 4 28 START ELEVATION= 237 . 9 FT 241 . 0 1020 410 437 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 237 . 9 ' 12" CULVERT n= . 015 L=45 ' S= . 0455 ' /' Ke= . 5 Cc= . 9 Cd= .6 2 S 240 .2 ' 40 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 .5 C=2 . 62 , 2 . 68, 0, 0, 0, 0, 0, 0 Primary Discharge I I=Culvert Secondary Discharge �-2=Broad-Crested Rectangular Weir POND 5 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 . 4 .5 . 6 . 7 . 8 . 9 237 . 9 0 .00 . 04 . 17 .37 . 63 . 94 1 . 30 1 . 67 2 . 05 2 .40 238 .9 2 .67 2 . 93 3 . 16 3 . 38 3 .59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 8 .52 14 . 72 22 . 70 32 . 12 42 . 78 54 . 79 240 . 9 67 .92 82 . 11 POND 5 PRIMARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 . 4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 . 37 .63 . 94 1 .30 1. 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 . 38 3 .59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 5 .21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 240 . 9 5 . 98 6 . 09 POND 5 SECONDARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 .7 . 8 . 9 237 . 9 0 . 00 0 . 00 0 . 00 0 . 00 0 .00 0 . 00 0 .00 0. 00 0 .00 0 . 00 238 . 9 0 . 00 0 .00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 239 . 9 0 . 00 0 . 00 0 . 00 0 . 00 3 .31 9 . 37 17 .22 26 . 51 37 . 05 48 . 93 240 . 9 61 . 94 76 .02 ata for DEVELOPMENT ASSOCIATES; 10-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 4 .5 IN "repared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00 . 000736 (c) 1986-1995 Applied Microcomputer Systems POND 5 DISCHARGE CATCHBASIN 3 pr i sect,ot 240 . 9 240 . 7 240 . 5 r __ 240 . 3 CRESTED_ RECTANGULAR _WEIR_ sec +' 240 . 1 239 . 9 t 239 . 7 0 2.39 . 5 F---I 239 . 3 - ~ 239 . 1 - 236 . 9 w 238 - 7 -1 w 238 .5 11 238 . 3 238 . 1 12'' CLILUERT pr,i. 297 . 9 0 in m LC) m n m Ln m n q Ln m Ln m to m N N M r9 V V n n �n �0 r- DISCHARGE (cfs) POND 5 INFLOW & OUTFLOW CATCHBASIN 3 1 . 7 - 1 . 6 STOR-IND METHOD 1 . 5 PEAK STOR= 9 CF 1 . 4 1 . 3 PEAK ELEU= 238 . 6 FT r, 1 . 2 - I . 0 Qin= 1 . 7 CFS U 9 Qout= 1 . 8 CFS . 8 Qpri= 1 . 8 CFS 0 7 Qsec= 0. 0 CFS � .5 LAG= . 1 MIN . 4 .3 2 . G 1 O .Om Ln m Ln m in m LD m LA m ID m m m N N m m d- �t m ISM t.o r- TIME (hours) 100-YEAR POSTDEVELOPMENT DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 _ata for DEVELOPMENT ASSOCIATES; 100-YEAR. POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN "repared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied microcomputer Systems I TERSHED ROUTING � 6 a A5 �o 1 \ 2 0 SUBCATCHMENT REACH POND r, LINK ata for DEVELOPMENT ASSOCIATES; 100-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN 21 Jul 95 �repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A om lied Microc uter Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 6 .4 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS UBCAT AREA Tc WGT'D PEAK Tpeak VOL NUMBER (ACRE) (MIN) GROUND COVERS (%CN) -- CN C (CFS) (HRS) _ AF 1 . 76 15 . 7 95%70 5077 - - 70 - 2 . 1 12 . 21 .16 2 . 51 3 . 9 27%98 69%98 4%74 - 97 - 3 .4 12 . 05 . 19 3 . 42 2 . 9 33%98 33%98 33%74 - 90 - 2 . 7 12 . 03 .14 4 .42 2 . 9 5%98 55%98 29%74 12%77 89 - 2 . 7 12 . 03 .14 5 . 39 2 . 9 74%98 26%74 - - 92 - 2 . 6 12 . 03 . 14 6 . 17 4 . 3 94%98 6%74 - - 97 - 1 . 1 12 . 05 .06 _)ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN -'repared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied microcomputer Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK NO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) (FT/FT) (FPS) (MIN) (CFS) 1 - 2 . 0 1 . 0 2 . 00 2 . 00 . 100 95 . 0240 1 . 3 1 .2 2 . 1 a Lata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN 21 Jul 95 repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A lied Microcom cater Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK ----- - PEAK FLOW ------ - ---Qout--- NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. MIN (FT) (FT) (FT) (AF) (CFS CFS CFS CFS o 1 243 . 5 245 . 0 244 . 8 . 04 . 2 . 1 1 . 7 16 6 . 6 2 237 . 2 242 .4 240 . 8 0 . 00 4 . 7 4 . 7 0 . 3 3 235 . 8 240 .5 237 . 8 0 . 00 2 . 7 2 . 7 0 . 3 4 235 .5 241 . 0 240 .4 0 . 00 9 . 9 9 . 7 2 1 . 0 5 237 . 9 241 . 0 238 . 9 0 . 00 2 . 6 2 . 6 2 . 6 0 . 1 -ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6.4 IN 21 Jul 95 repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= 2 . 1 CFS @ 12 . 21 HRS, VOLUME= . 16 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR . 04 77 BRUSH/WEED MIX-POOR-C RAINFALL= 6 .4 IN . 76 70 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tr (min1 'R-55 SHEET FLOW Segment ID: 7 . 6 .foods : Light underbrush n= .4 L=50 ' P2=3 . 1 in s= . 07 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 8 . 1 'orest w/Heavy Litter Kv=2 . 5 L=320 ' s= . 07 ' / ' V= . 66 fps Total Length= 370 ft Total Tc= 15 . 7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABOUE PARKING LOT 2 .e 1 .8 - AREA= . 76 AC Tc= 15 . 7 MIN 1 .6 CN= 70 r, 1 .4 1 SCS TR-28 METHOD U TYPE III 24-HOUR RAINFALL= 6 .4 IN 3 6 PEAK= 2 . 1 CF5 � @ 12 .21 HRS .4 UOLUME= 16 AF .2 © .am Ln m Ln m Ln m M m U) m Ln m m m N N M M d d Ln Ifs �Q TIME (1-)our5) _ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN 21 Jul 95 -repared by David E . Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 Applied MicrocQ uter Systems UBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 3 .4 CFS @ 12 . 05 HRS, VOLUME= . 19 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 35 98 PARKING LOT RAINFALL= 6 .4 IN . 02 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 51 97 9ethod Comment Tc (min) 2R-55 SHEET FLOW Segment ID: 1 • 9 Woods : Light underbrush n= .4 L=15 ' P2=3 . 1 in s= . 2 ' / ' 'R-55 SHEET FLOW Segment ID: 4 >mooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 05 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 6 T?aved Kv=20 . 3282 L=190 ' s= . 01 ' / ' V=2 . 03 fps Total Length= 245 ft Total Tc= 3 . 9 SUBCATCHMENT 2 RUNOFF DRAINAGE AREA TO CATCHBASIN 4 3 . 4 AREA= . 51 AC 3 . 0 - 2 _8 Tc= 3 . 9 MIN 2 .6 CN= 97 _ 2 . 4 LO 2 .2 SCS TR-20 METHOD u- 2 . 0 L) 1 . 8 TYPE III 24-HOUR 1 . 6 RAINFALL= 6.. 4 IN 3 1 . 4 o j .� PEAK= 3 . 4 CFS . 8 @ 12 .05 HRS 6 UOLUME= . 19 OF . 4 k cs)U Ln m m m Ln m u-) m m m m N N M M T L� In tD TIME (hours) __ ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN -repared by David E . Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A lied Microcom uter Systems UBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 2 . 7 CFS @ 12 . 03 HRS, VOLUME= . 14 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 6 .4 IN . 14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 42 90 fethod Comment Tc (min) -'R-55 SHEET FLOW Segment ID: 1 .4 Grass: Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 ' / ' 'R-55 SHEET FLOW Segment ID: • 7 smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 8 Raved Kv=20 . 3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 .9 SUBCATCHMENT 3 RUNOFF DRAINAGE AREA TO CATCHBASIN 6 2 . 6 - 2 .4 AREA= .42 AC 22 - Tc= 2. 9 MIN 2 .0 CN= 90 C 1 6 SCS TR-20 METHOD 1 4 TYPE III 24-HOUR 1 2 RAINFALL= 6 .4 IN 0 1 . 8 PEAK= 2. 7 CFS @ 12 .03 HRS 4 UOLUME= . 14 AF . 2 f ® .Om to m L a m LO m Ln m U-) m n m C\J M r l a- d' U-) if) �0 TIME (hours) Lata for DEVELOPMENT ASS0CIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN 21 Jul 95 ^epared by David E . Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 APP lied Microcom cater Systems JBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 2 . 7 CFS @ 12 . 03 HRS, VOLUME= . 14 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR . 23 98 PAVEMENT RAINFALL= 6 .4 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C .42 89 Comment Tc_ min a.ethod TR-55 SHEET FLOW Segment ID: 1 .1 mooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 1 . 8 -HALLOW CONCENTRATED/UPLAND FLOW Segment ID: Paved Kv=20 . 3282 L=200 ' s= . 008 1 / ' V=1 . 82 fps Total Length= 250 ft Total Tc= 2 .9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 2 .6 2 . 4 - AREA= .42 AC 2 .2 Tc= 2 . 9 MIN 2 . L CN= 89 C4- 1 .6 SCS TR-20 METHOD u 1 .4 TYPE III 24-HOUR 1 .2 RAINFALL= 6 . 4 IN 1 .8 PEAK= 2 . 7 CFS 6 @ 12 .03 HRS .4 UOLUME= . 14 AF .2 �r`r I I 8 .Eim � m L(') m m m ® u� m 0 m � � N N �l r�! T d- n Ln tD TIME (hours) ata for DEVELOPMENT ASSOCIATES; 100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN � repared by David E . Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer-.Systems ;UBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= 2 . 6 CFS @ 12 . 03 HRS, VOLUME= . 14 AF ACRES CN SCS TR-20 METHOD . 29 98 PARKING LOT TYPE III 24-HOUR . 10 74 LAWN-GOOD-C RAINFALL= 6 .4 IN . 39 92 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tr (min) t'R-55 SHEET FLOW Segment ID: 1 .4 -7rass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 ' / ' TR-55 SHEET FLOW Segment ID: 3 Smooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 05 ' / ' ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: g Paved Kv=20 . 3282 L=110 ' s= . 01 ' / ' V=2 . 03 fps SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 3 ?aved Kv=20 .3282 L=70 ' s= . 04 ' / ' V=4 . 07 fps Total Length= 230 ft Total Tc= 2 . 9 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 2 .6 2 . 4 AREA= . 39 AC 2 .2 Tc= 2 . 9 MIN 2 .0 CN= 92 1 . 6 SCS TR-20 METHOD Cf- u 1 . 4 TYPE III 24-HOUR 1 -2 RAINFALL= 6 . 4 IN 0 1 . 0 _j 8 PEAK- 2 . 6 CFS .6 @ 12 . 03 HRS .4 UOLUME= . 14 AF 2 8 . 0 n. mLn mLn mu� m to m to m -- N N M r 1 d" d- Lid n �D TIME CI-)ours) ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN -repared by David E . Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 6 RUNOFF FROM NEW PARKING AREA AT REAR PEAK= 1 . 1 CFS @ 12 . 05 HRS, VOLUME= . 06 AF ACRES CN SCS TR-20 METHOD . 16 98 PARKING LOT TYPE III 24-HOUR . 01 74 LAWN-GOOD-C RAINFALL= 6 .4 IN . 17 97 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tr (min) .R-55 SHEET FLOW Segment ID: 3 . 2 floods : Dense underbrush n= . 8 L=10 ' P2=3 . 1 in s= . 1 ' / ' TR-55 SHEET FLOW Segment ID: 5 )mooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 03 ' / ' ALLOW CONCENTRATED/UPLAND FLOW Segment ID: 6 ;H Paved Kv=20 .3282 L=130 ' s= . 03 ' / ' V=3 .52 fps Total Length= 180 ft Total Tc= 4 . 3 SUBCATCHMENT 6 RUNOFF RUNOFF FROM NEW PARKING AREA AT REAR 1 . 1 I .M AREA= . 17 AC 9 Tc= 4 . 3 MIN r-, S CN= 97 7 SCS TR-20 METHOD . 6 TYPE III 24-HOUR . 5 RAINFALL= 6 . 4 IN 3 O 4 3 PEAK= 1 . 1 CFS e 12 . 05 HRS 2 VOLUME= . 06 AF . 1 0 . 8m in m �n m �n m m m — N N r'1 M � d- Ln n 0 - r- — — — TIME (hours) -ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN repared by David E. Ross Associates, Inc. 21 Jul 95 vdroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems EACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = 2 . 1 CFS @ 12 . 30 HRS, VOLUME= . 20 AF Qout= 2 . 1 CFS @ 12 .33 HRS, VOLUME= . 20 AF, ATTEN= 0%, LAG= 2 . 0 MIN DEPTH END AREA DISCH (FT) (SO-FT) (CFS) 2 ' x 1 ' CHANNEL STOR-IND+TRANS METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 2 ' / ' PEAK DEPTH= . 66 FT . 1 . 2 . 1 n= . 1 PEAK VELOCITY= 1 . 3 FPS . 2 .4 . 3 LENGTH= 95 FT TRAVEL TIME = 1 . 2 MIN . 3 . 6 . 6 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= . 02 HRS .4 1 . 0 1 . 0 . 6 1 .4 1 . 8 . 8 1 . 9 2 . 8 1 . 0 2 . 5 4 . 0 REACH i DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN . 9 - .7 ' 5 . 4 w .3 � 2' x 1 ' CHANNEL i� SIDE SLOPE= 2 '/' �J n= . 1 L=95' S= . 024 i 0 .0 L0 m in m LD m to CS) CD N N m m IT DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 100-YEAR. POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH i INFLOW & OUTFLOW SWALE BETIa1EEN WETLAND AND CATCHBASIN 2 . 0 �� ` 2' x 1 : CHANNEL 1 . 8 1� �y SIDE SLOPE= 2 'f' 1 . 6 n= . 1 L=95' 5= . 024 1 . 4 i to + TOR-IND+TRANS METHOD 4 1 . 2 ' OELOCITY= 1 . 3 FPS t TRAUEL= 1 . 2 MIN 3 0 S G i n= 2 . 1 CFS Grout= 2 . 1 CFS . 4 ,' LAG= 2 MIN . 2 - 0 . 00 In 0. Ln m Lo. 0. DO- m DA. m In m 0 m — — l-\l N r,-, (,"l �,r d- Lf Ln o TIME (hour--s) _ ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6.4 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems OND 1 AREA OF PONDING ABOVE PARKING LOT Qin = 2 . 1 CFS @ 12 . 21 HRS, VOLUME= . 16 AF Qout= 1 . 7 CFS @ 12 . 32 HRS, VOLUME= . 14 AF, ATTEN= 160, LAG= 6 . 6 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 1667 CF 243 . 5 350 0 0 PEAK ELEVATION= 244 . 8 FT 243 . 9 500 170 170 FLOOD ELEVATION= 245 . 0 FT 244 . 0 600 55 225 START ELEVATION= 243 . 5 FT 244 . 1 700 65 290 SPAN= 10-16 HRS, dt= . 02 HRS 245 . 0 3500 1890 2180 ROUTE INVERT OUTLET DEVICES 1 P 244 . 3 ' 2 ' BROAD-CRESTED RECTANGULAR. WEIR Q=C L H^1 . 5 C=2 . 79, 2 . 93, 3 . 06 , 0 , 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 .9 243 .5 I 0 . 00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 . 18 244 .5 . 50 . 92 1 .41 1 . 97 2 . 62 3 . 33 POND 1 DISCHARGE AREA OF PONDING ABOUE PARKING LOT 245 .0 244 .9 244 .8 244 . 7 244 .6 ti 244 . 5 '` r l 244 .4 f` 244 .3 ' BROAD-CRESTED- RECTANGULAR- -WEIR % - - - - - E - 244 . 2 �- 244 . 1 - 244 .E w 243 .9 w 243 . E3 243 .7 243 . 6 243 .5 N d- lD ro m N 0 GD m N 0 m m N CD - - - N N N N N m m DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN "repared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems-__ POND i INFLOW & OUTFLOIJ AREA OF PONDING ABOVE PARKING LOT 2 .0 18 STOR-IND METHOD f . 6 � � PEAK STOR= 1667 CF PEAK ELEU= 244 . 8 FT 1 . 4 1 .2 �t QIn= 2. 1 CFS Gout= 1 . 7 CFS 1 .0 r �, LAG= 6 . 6 MIN 1 0 J 1 1 . 4 f 1 .2 1 O .Om �n o. Ln m Lo © Ln 0. U) . T). m r- T- TIME (hours) ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN "repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 2 CATCHBASIN 4 Qin = 4 . 7 CFS @ 12 . 06 HRS, VOLUME= .39 AF QOut= 4 . 7 CFS @ 12 . 06 HRS, VOLUME= .39 AF, ATTEN= Oo, LAG= 3 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 47 CF 237 . 2 13 0 0 PEAK ELEVATION= 240 . 8 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 .4 FT 241 . 3 4 4 51 START ELEVATION= 237 . 2 FT 241 .4 100 5 56 SPAN= 10-16 HRS, dt= . 02 HRS 242 .4 200 150 206 ROUTE INVERT OUTLET DEVICES 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' S= . 0091 / ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 241 . 3 ' 30 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 .2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 2 0 . 0 0 . 0 .1 . 3 . 6 . 8 1 .2 1 . 5 1 . 9 2 . 2 238 . 2 2 . 5 2 . 8 3 . 0 3 . 1 3 . 0 3 . 1 3 .2 3 . 3 3 .4 3 . 5 239 . 2 3 . 6 3 . 6 3 .7 3 . 8 3 . 9 4 . 0 4 . 0 4 . 1 4 . 2 4 .3 240 . 2 4 . 3 4 . 4 4 .5 4 . 5 4 . 6 4 . 7 4 . 7 4 . 8 4 . 8 4 . 9 241 . 2 5 . 0 5 . 0 7 . 6 12 . 2 18 . 1 25 . 2 33 . 1 42 . 1 51 . 9 62 .5 242 . 2 73 . 9 86 . 0 98 .4 111 .4 POND 2 DISCHARGE CATCHBASIN 4 -flood elev .- - - - - - - - - ^�� - - - 242 . 2 241 . 7 3LW-BROAD-CRESTED RECTANGULAR WEIR 241 . 2 i - - - - - - - - 240 .7 240 . 2 239 . 7 239 .2 D 238 . 7 - f w 238 . 2 -)' 1 237 . 71 CULUERT 237 .2 m m m m m m m m m m m �v r, IT Ln 0 r 00 m m DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 2 INFLOW & OUTFLOW CATCHBASIN 4 4 .5 STOR-I1C METHOD 4 . 0 PEAK STOR= 47 CF 3 . 5 PEAK ELEU= 240 .8 FT 3 . 0 Qin= 4 . 7 CFS L) 2 . 5 Qout= 4 . 7 CFS 3 2 .0 LAG= . 3 MIDI � 1 . 5 LL 1 .0 .5 0 . 0 Ln m Ln m Ln m Ln m Ln m LCD m N M M V T L(7 Ln lD TIME (hours) � r ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 3 CATCHBASIN 6 Qin = 2 . 7 CFS @ 12 . 03 HRS, VOLUME= . 14 AF Qout= 2 . 7 CFS @ 12 . 04 HRS, VOLUME . 14 AF, ATTEN= Oo, LAG= 3 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 26 CF 235 . 8 13 0 0 PEAK ELEVATION= 237 . 8 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 . 5 FT 239 .4 4 4 45 START ELEVATION= 235 . 8 FT 240 . 0 2600 781 826 SPAN= 10-16 HRS , dt= . 02 HRS 240 . 5 7600 2550 3376 ROUTE INVERT OUTLET DEVICES 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' 5= . 0017 ' / ' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs .ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 .9 235 . 8 0 . 00 . 02 . 07 . 16 .28 .44 . 62 . 82 1 . 04 1 . 26 236 . 8 1 .47 1 . 67 1. 82 1 . 88 1 . 93 2 . 08 2 . 22 2 . 36 2 . 48 2 . 60 237 . 8 2 . 72 2 . 83 2 . 93 3 . 04 3 . 14 3 . 23 3 . 33 3 .42 3 . 51 3 . 59 238 . 8 3 .68 3 . 76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 .22 4 . 29 4 . 36 239 . 8 4 .43 4 . 50 4 . 57 4 . 64 4 . 70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 240 . 3 - i 239 . 8 239 . 3 238 .8 0 238 . 3 237 . 8 w 237 . 3 w 236 . 8 236 . 3 ..-°� 12" CULVERT 235 . 8m Ln m Ln m Ln m to m Ln DISCHARGE (cfs) ata for DEVELOPMENT ASS0CIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN prepared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 3 INFLOW & OUTFLOW CATCHDASIN 6 2 .6 STOR-IND METHOD 2 . 4 2 PEAK STOR= 26 CF PEAK ELEU= 237 . 8 FT 1 .8 C+_ 1 .6 Q i n= 2 . 7 C F S 1 4 Qout= 2 . 7 CFS 1 2 LAG= . 3 MIN 0 1 .0 � 8 � 6 . 4 2 0 .Om m 'no LCD m n' m n m m cD — N t .I R 1 T L-) In �-Q TIME (hours) ata for DEVELOPMENT ASSOCIATES; 100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN ' repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 4 CATCHBASIN 2 Qin = 9 . 9 CFS @ 12 . 05 HRS, VOLUME= . 67 AF Qout= 9 . 7 CFS @ 12 . 06 HRS, VOLUME= . 67 AF, ATTEN= 20, LAG= 1 . 0 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 171 CF 235 . 5 13 0 0 PEAK ELEVATION= 240 . 4 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 . 0 FT 240 .3 4 4 60 START ELEVATION= 235 . 5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= .02 HRS ROUTE INVERT OUTLET DEVICES 1 P 235 . 5 ' 12" CULVERT n= . 015 L=30 ' 5= . 0111 ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 240 . 3 ' 25' BROAD-CRESTED RECTANGULAR. WEIR Q=C L H^1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 4 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 235 . 5 0 . 00 . 03 . 14 . 31 .53 . 80 1 . 09 1 . 41 1 . 74 2 . 07 236 . 5 2 .39 2 . 69 2 . 94 3 . 08 3 . 18 3 .40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 . 34 4 . 50 4 . 66 4 . 81 4 . 96 5 . 10 5 . 24 5 . 38 5 . 51 5 . 64 238 . 5 5 . 77 5 . 89 6 . 02 6 . 13 6 . 25 6 . 37 6 .48 6 . 59 6 . 70 6 . 81 239 . 5 6 . 91 7 . 01 7 . 12 7 . 22 7 . 32 7 .42 7 .51 7 . 61 7 . 70 9 . 87 240 . 5 13 . 75 18 . 74 24 . 64 31 . 32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHBASIN 2 241 . 0 - �� ----- 240 .5 25' BRAD-£RE�TEb` RECTANGULAR L1- - 240 .0 � 239 . 5 ,r 239 . 0 - rr 2 238 . 5 - r� 238 .0 - i� Q 237 .5 - �- D 237 . 0 r w 236 .5 - 236 . 0 / 12,11 CULVERT 2 3 5 . 5� Ln m to m to m Ln m Ln DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES;100-YEAR POST-REV 7/21 TYPE III 24-HOUR. RAINFALL= 6 .4 IN ^repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00 . 000736 (c) 1986-1995 Applied Microcomputer Systems_ POIC 4 INFLOW & OUTFLOW CATCHBOSIN 2 9 . 5 H STOR-IND METHOD 8 . 0 - PEAK STOR= 171 CF 7 .5 PEAK ELEU= 240 . 4 FT 76 .85 u5 e Oin= 9 . 9 CFS `. 5 . 0 Oout= 9 . 7 CFS 44q . 5e LAG= 1 MIN 3 3 . 5 J 30 LL 2 .5 2 . 0 Lo 0 5 0 .em Ln m L, m O O — — (\) N P-) r 1 V- It Lid n Q0 TII`1E (hours) )ata for DEVELOPMENT ASSOCIATES;100-YEAR. POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN '?repared by David E . Ross Associates, Inc . 21 Jul 95 lydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems ?OND 5 CATCHBASIN 3 Qin = 2 .6 CFS @ 12 .03 HRS, VOLUME= . 14 AF Qout= 2 . 6 CFS @ 12 . 03 HRS, VOLUME= . 14 AF, ATTEN= 0%, LAG= . 1 MIN Qpri= 2 . 6 CFS @ 12 .03 HRS, VOLUME= . 14 AF Qsec= 0 . 0 CFS @ 0 . 00 HRS, VOLUME= 0 . 00 AF ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 13 CF 237 . 9 13 0 0 PEAK ELEVATION= 238 . 9 FT 239 . 7 13 23 23 FLOOD ELEVATION= 241 . 0 FT 240 . 2 4 4 28 START ELEVATION= 237 . 9 FT 241 . 0 1020 410 437 SPAN= 10-16 HRS, dt= .02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 237 . 9 ' 12" CULVERT n= . 015 L=45 ' S= . 0455 ' /' Ke= . 5 Cc= . 9 Cd= . 6 2 S 240 .2 ' 40' BROAD-CRESTED RECTANGULAR WEIR Q=C L H-1 .5 C=2 . 62, 2 . 68, 0, 0, 0, 0,, 0, 0 Primary Discharge I 1=Culvert Secondary Discharge �-2=Broad-Crested Rectangular Weir POND 5 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 .37 . 63 . 94 1 . 30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 .38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 8 . 52 14 . 72 22 . 70 32 . 12 42 . 78 54 . 79 240 . 9 67 .92 82 . 11 POND 5 PRIMARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 . 37 . 63 . 94 1 .30 1 . 67 2 . 05 2 .40 238 . 9 2 .67 2 . 93 3 . 16 3 .38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 .63 4 . 78 4 . 93 5 .07 5 .21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 240 . 9 5 . 98 6 . 09 POND 5 SECONDARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 237 . 9 0 .00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 238 . 9 0 . 00 0 . 00 0 . 00 0 .00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 239 . 9 0 .00 0 . 00 0 . 00 0 . 00 3 .31 9 . 37 17 . 22 26 . 51 37 . 05 48 .93 240 . 9 61 . 94 76 . 02 )ata for DEVELOPMENT ASSOCIATES; 100-YEAR POST-REV 7/21 TYPE III 24-HOUR RAINFALL= 6 .4 IN prepared by David E . Ross Associates, Inc. 21 Jul 95 1lydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 5 DISCHARGE CATCHBASIN 3 pr sectot 240 . 9 240 . 7 240 . 5 -. 240 . 3 BVGA T-CRESTED RECTANGULAR WEIR_ sec +' 240 . 1 r 239 . 9 r 239 . 7 2.39 . 5 H 239 . 3 r '- 239 . 1 r Q 238 .9 w 238 . 7 r w 238 . 5 1 238 . 3 238 . 1 12" CULVERT prj 237 , 9m Ln m Ln m in 0 n m in m Ln m u-) m to m ru N m m IT 7r D n � �0 r- r- co DISCHARGE (cfs) POND 5 INFLOW & OUTFLOW CATCHBASIN 3 2 .6 2 . 4 STOR-IND METHOD 2 .2 - PEAK STOR= 13 CF 2 .0 PEAK ELEU= 238 . 9 FT n 1 .6 Din= 2. 6 CFS u 1 .4 Qout= 2 . 6 CFS 1 .2 Qpri = 2. 6 CFS 0 1 .8 Qsec= 0 . 0 CFS _j . S LAG= . 1 MIN 6 . 4 2 0 Nm in m m m �n m n m to m m m d- v n n Q0 r - - TIME (hours) 25-YEAR. STORM-COMPLETE SYSTEM DAVID E. ROSS ASSOCIATES, INC. P.O. Box 361 17 West Main Street Ayer, Massachusetts 01432 508-772-6232 FAX 508-772-6258 I Ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN P-7epared by David E . Ross Associates, Inc. 21 Jul 95 ] 7droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems 1 =RSHED ROUTING o a /7\ O 6 A5 0 0 z Q a o � o � Lf`(D 0 0 SJBCATCHMENT F] REACH A POND LINK I ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN r--epared by David E. Ross Associates, Inc. 21 Jul 95 l .,droCAD 4 , 00 000736 (c) 1986-1995 Applied Microcomputer Systems RUNOFF BY SCS TR-20 METHOD: TYPE III 24-HOUR RAINFALL= 5 .3 IN, SCS U.H. RUNOFF SPAN = 10-16 HRS, dt= .02 HRS, 301 POINTS JBCAT AREA Tc WGT'D PEAK Tpeak VOL NUMBER (ACRE) (MIN) GROUND COVERS (%CN) -- CN C (CFS) (HRS) (AF) 1 . 76 15 . 7 95%70 5077 - - 70 - 1 . 5 12 .21 . 11 2 . 51 3 . 9 27098 69098 4%74 - 97 - 2 . 8 12 . 05 . 15 3 .42 2 . 9 33%98 33%98 33%74 - 90 - 2 . 2 12 . 03 . 11 4 .42 2 . 9 5%98 55%98 29%74 12%77 89 - 2 . 1 12 . 03 . 11 5 . 39 2 . 9 74%98 26%74 - - 92 - 2 . 1 12 . 03 . 11 6 . 17 4 . 3 94%98 6%74 - - 97 - . 9 12 . 05 . 05 7 . 04 1 . 6 100%98 - - - 98 - . 2 12 . 01 . 01 8 7 . 56 13 . 3 29%98 38%65 19%74 15%70 77 - 20 . 2 12 . 17 1 . 46 ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN "repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH ROUTING BY STOR-IND+TRANS METHOD REACH BOTTOM SIDE PEAK TRAVEL PEAK [PTO. DIAM WIDTH DEPTH SLOPES n LENGTH SLOPE VEL. TIME Qout (IN) (FT) (FT) (FT/FT) (FT) (FT/FT) (FPS) (MIN) (CFS) 1 - 2 . 0 1 . 0 2 . 00 2 . 00 . 100 95 . 0240 1 . 2 1 . 3 1 .4 eta for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN T`repared by David E. Ross Associates, Inc . 21 Jul 95 , 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND ROUTING BY STOR-IND METHOD POND START FLOOD PEAK PEAK ------ PEAK FLOW -- --- -- ---QOut--- NO. ELEV. ELEV. ELEV. STORAGE Qin Qout Qpri Qsec ATTEN. LAG (FT) (FT) (FT) (AF) (CFS) (CFS) (CFS) (CFS) (o) (MIN) 1 243 . 5 245 . 0 244 . 6 . 03 1 . 5 1 . 1 24 9 . 1 2 237 . 2 242 . 4 239 . 2 0 . 00 3 . 6 3 . 6 0 . 2 3 235 . 8 240 . 5 237 .4 0 .00 2 . 2 2 .2 0 . 3 4 235 . 5 241 . 0 240 .3 0 . 00 7 . 9 7 . 8 0 . 3 5 237 . 9 241 . 0 238 . 7 0 . 00 2 . 1 2 . 1 2 . 1 0 . 1 6 235 . 0 242 . 0 240 . 0 0 . 00 8 . 0 8 . 0 0 . 3 7 235 . 0 244 . 0 243 . 7 . 01 21 . 0 21 . 0 0 . 7 ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN -repared by David E. Ross Associates, Inc . 21 Jul 95 droCAD 4 . 00 000736 c 1986-1995 A m lied Microco uter' Systems UBCATCHMENT 1 DRAINAGE AREA ABOVE PARKING LOT PEAK= 1 . 5 CFS @ 12 .21 HRS, VOLUME= . 11 AF ACRES CN SCS TR-20 METHOD . 72 70 WOODS-GOOD-C TYPE III 24-HOUR 04 77 BRUSH/WEED MIX RAINFALL= 5 . 3 IN 76 70 SPAN= 10-16 HRS, dt=. 02 HRS Method Comment Tc (min) R-55 SHEET FLOW Segment ID: 7 . 6 'oods : Light underbrush n= .4 L=50 ' P2=3 . 1 in s= . 07 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 8 .1 -orest w/Heavy Litter Kv=2 . 5 L=320 ' s= . 07 ' / ' V= . 66 fps Total Length= 370 ft Total Tc= 15 . 7 SUBCATCHMENT 1 RUNOFF DRAINAGE AREA ABOUE PARKING LOT 1 . 4 AREA= . 76 AC 1 . 3 1 Tc= 15 . 7 MIN 1 . 1 CN= 70 1 .0 `- .9 SCS TR-20 METHOD U .S TYPE III 24-HOUR .7 RAINFALL= 5 . 3 IN 3 .6 O 5 PEAK= 1 . 5 CFS 4 3 G 12 . 21 HRS 2 UOLUME= . 11 AF . 1 0 .0m in m in m Ln m to m to m m m m N N m m d' -Ir in n �.D TIME (hours) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN "repared by David E . Ross Associates, Inc. 21 Jul 95 vdroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 2 DRAINAGE AREA TO CATCHBASIN 4 PEAK= 2 . 8 CFS @ 12 . 05 HRS, VOLUME= . 15 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 35 98 PARKING LOT RAINFALL= 5 .3 IN . 02 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 51 97 lethod Comment Tc (min) _'R-55 SHEET FLOW Segment ID: 1 . 9 Woods : Light underbrush n= .4 L=15 ' P2=3 . 1 in s= . 2 ' / ' ,R-55 SHEET FLOW Segment ID: •4 smooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 05 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 6 paved Kv=20 .3282 L=190 ' s= . 01 ' / ' V=2 . 03 fps Total Length= 245 ft Total Tc= 3 . 9 SUBCATCHMENT 2 RUNOFF DRAINAGE AREA TO CATCHBASIN 4 2 . 8 - 2 . 6 AREA= . 51 AC 2 . 4 Tc= 3 . 9 MIN 2 .2 CN= 97 _ 2 .0 1 .8 SCS TR-20 METHOD 1 . 6 TYPE III 24-HOUR 1 . 4 1 RAINFALL= 5 . 3 IN 3 . 2 o 1 .0 - LL . 8 - PEAK= 2 . S CFS 6 @ 12 . 05 HRS . 4 UOLUME= 15 AF . 2 0 .0m to m Ln m Ln o Ln m Lf) m in m N N r'1 M d- V U-) n l0 TIME (hours) l ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5.3 IN " -epared by David E . Ross Associates, Inc . 21 Jul 95 ] 7droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems jBCATCHMENT 3 DRAINAGE AREA TO CATCHBASIN 6 PEAK= 2 . 2 CFS @ 12 . 03 HRS, VOLUME= . 11 AF ACRES CN SCS TR-20 METHOD . 14 98 ROOF TYPE III 24-HOUR . 14 98 PARKING LOT RAINFALL= 5 . 3 IN .14 74 GRASS-GOOD-C SPAN= 10-16 HRS, dt=. 02 HRS .42 90 athod Comment Tc (min) -R-55 SHEET FLOW Segment ID: 1 .4 Grass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 R-55 SHEET FLOW Segment ID: • 7 mooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= . 008 SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 8 Daved Kv=20 . 3282 L=90 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 140 ft Total Tc= 2 . 9 SUBCATCHMENT 3 RUNOFF DRAINAGE AREA TO CATCHBASIN 6 2 . 2 2 . 0 AREA= 42 AC 1 . 8 Tc= 2 . 9 MIN 1 . 6 CN= 90 1 .4 SCS TR-20 METHOD C+- 1 . 2 TYPE III 24-HOUR 1 . 0 RAINFALL= 5 .3 IN 0 8 � 6 PEAK= 2 . 2 CFS 4 @ 12 . 03 HRS UOLUME= . 11 AF . 2 0 . CD m F) M. d �a TIME (hours) � .- c- ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN repared by David E. Ross Associates, Inc. 21 Jul 95 . �droCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 4 DRAINAGE AREA TO CATCHBASIN 2 PEAK= 2 . 1 CFS @ 12 . 03 HRS, VOLUME= . 11 AF ACRES CN SCS TR-20 METHOD . 02 98 ROOF TYPE III 24-HOUR .23 98 PAVEMENT RAINFALL= 5 . 3 IN . 12 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS . 05 77 BRUSH/WEED-POOR-C .42 89 ethod Comment Tc (min) TR-55 SHEET FLOW Segment ID: 1 . 1 mooth surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 007 HALLOW CONCENTRATED/UPLAND FLOW Segment ID: 1 . 8 Paved Kv=20 . 3282 L=200 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 250 ft Total Tc= 2 . 9 SUBCATCHMENT 4 RUNOFF DRAINAGE AREA TO CATCHBASIN 2 2 .0 AREA= .42 AC 1 - 8 Tc= 2 . 9 MIN 1 - 5 CN= 89 1 . 4 SCS TR-20 METHOD U 1 ' 2 TYPE III 24-HOUR 1 © RAINFALL= 5 .3 IN 3 O � E PEAK= 2 . 1 CFS @ 12 . 83 HRS 4 UOLUME= . 11 OF . 2 0 �m tt� m to m m m m -- — N N M M d- IY n n �.o .-- — — — r- TIME (hours) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN -repared by David E. Ross Associates, Inc . 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 5 DRAINAGE AREA TO CATCHBASIN 3 PEAK= 2 . 1 CFS @ 12 . 03 HRS, VOLUME= . 11 AF ACRES CN SCS TR-20 METHOD . 29 98 PARKING LOT TYPE III 24-HOUR . 10 74 LAWN-GOOD-C RAINFALL= 5 . 3 IN . 39 92 SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) R-55 SHEET FLOW Segment ID: 1 .4 rass : Short n= . 15 L=20 ' P2=3 . 1 in s= . 1 ' / ' TR-55 SHEET FLOW Segment ID: 3 mooth surfaces n= . 011 L=30 ' P2=3 . 1 in s= .05 HALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 9 Paved Kv=20 . 3282 L=110 ' s= . 01 ' / ' V=2 . 03 fps IqHALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 3 aved Kv=20 . 3282 L=70 ' s= . 04 ' / ' V=4 . 07 fps Total Length= 230 ft Total Tc= 2 . 9 SUBCATCHMENT 5 RUNOFF DRAINAGE AREA TO CATCHBASIN 3 AREA= . 39 AC 1 Tc= 2 . 9 MIN 1 . 6 CN= 92 1 . 4 U 1 2 SCS TR-20 METHOD TYPE III 24-HOUR 1 © RAINFALL= 5 . 3 IN 3 8 O 6 PEAK= 2 . 1 CF5 4 0 12 . 03 HRS UOLUME= . 11 AF . 2 0 .0 LA m Ln m in m LA m u-) 0 in m M M 'T d ISM n iD TIME Ch�urs? ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN repared by David E . Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 6 RUNOFF FROM NEW PARKING AREA AT REAR PEAK= . 9 CFS @ 12 . 05 HRS, VOLUME= . 05 AF ACRES CN SCS TR-20 METHOD . 16 98 PARKING LOT TYPE III 24-HOUR . 01 74 LAWN-GOOD-C RAINFALL= 5 . 3 IN 17 97 SPAN= 10-16 HRS, dt= .02 HRS Method Comment Tc (min) R-55 SHEET FLOW Segment ID: 3 .2 'oods : Dense underbrush n= . 8 L=10 ' P2=3 . 1 in s= . 1 TR-55 SHEET FLOW Segment ID: •5 -mooth surfaces n= . 011 L=40 ' P2=3 . 1 in s= . 03 HALLOW CONCENTRATED/UPLAND FLOW Segment ID: • 6 Paved Kv=20 . 3282 L=130 ' s= . 03 ' / ' V=3 . 52 fps Total Length= 180 ft Total Tc= 4 . 3 SUHCATCHMENT 6 RUNOFF RUNOFF FROM NEW PARKING AREA AT REAR . 90 .8� AREA= . 17 AC 75 Tc= 4 . 3 MIN .70 CN= 97 .68 U .5�SCS TR-20 METHOD 45 TYPE III 24-HOUR 0 30 RAINFALL= 5 .3 IN 3 PEAK= . 9 CFS LL 25 12 . 05 HRS . 18 OOLUME= . 05 OF . (35 LA m LO m Ln m Ln m U-) m Ln m r- — r- — — — — TIME (hours) ] ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN ?' -epared by David E . Ross Associates, Inc. 21 Jul 95 ) rdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems 7BCATCHMENT 7 DRAINAGE AREA TO CTB #2 PEAK= . 2 CFS @ 12 . 01 HRS, VOLUME= . 01 AF ACRES CN SCS TR-20 METHOD . 04 98 IMPERVIOUS TYPE III 24-HOUR RAINFALL= 5 . 3 IN SPAN= 10-16 HRS, dt= . 02 HRS Method Comment Tc (min) R-55 SHEET FLOW Segment ID: • 9 _mooch surfaces n= . 011 L=50 ' P2=3 . 1 in s= . 01 ' / ' SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 7 -aved Kv=20 . 3282 L=80 ' s= . 008 ' / ' V=1 . 82 fps Total Length= 130 ft Total Tc= 1 .6 SUBCATCHMENT 7 RUNOFF DRAINAGE AREA TO CTB #2 . 24 .2' AREA= . 04 AC .20 Tc= 1 . 6 MIN 1B CN= 98 16 C 14 SCS TR-20 METHOD 12 TYPE III 24-HOUR 3 . 10 RAINFALL= 5 . 3 IN o .08 PEAK= . 2 CFS .06 @ 12 .01 HRS .04 VOLUME= . 01 AF .02 � . 00 Ln m Ln m Ln m Ln m U-) m Ln m Ltd LO �O .-- � `TIME (hours) � �-- ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN -repared by David E. Ross Associates, Inc. 21 Jul 95 vdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems UBCATCHMENT 8 OFF-SITE DRAINAGE TO NORTHERN OUTFALL PEAK= 20 . 2 CFS @ 12 . 17 HRS, VOLUME= 1 .46 AF ACRES CN SCS TR-20 METHOD 2 . 16 98 IMPERVIOUS TYPE III 24-HOUR 2 . 90 65 BRUSH/WEED-GOOD-C RAINFALL= 5 .3 IN 1 .40 74 LAWN-GOOD-C SPAN= 10-16 HRS, dt= . 02 HRS 1 . 10 70 WOODS-GOOD-C 7 . 56 77 'ethod Comment Tc (min) TR-55 SHEET FLOW Segment ID: 6 . 6 "oods : Light underbrush n= .4 L=50 ' P2=3 . 1 in s= . 1 ;HALLOW CONCENTRATED/UPLAND FLOW Segment ID: 4 . 7 Forest w/Heavy Litter Kv=2 . 5 L=200 ' s= . 08 ' / ' V= . 71 fps SHALLOW CONCENTRATED/UPLAND FLOW Segment ID: 2 . 0 ,aved Kv=20 . 3282 L=500 ' s= . 04 ' / ' V=4 . 07 fps ,!HANNEL FLOW Segment ID: 0 . 0 a= . 8 sq-ft Pw=3 . 1 ' r= .258 ' = . 038 ' / ' n= . 015 V=7 . 83 fps L=20 ' Capacity=6 . 3 cfs Total Length= 770 ft Total Tc= 13 . 3 SUBCATCHMENT S RUNOFF OFF-SITE DRAINAGE TO NORTHERN OUTFALL 20 18 AREA= 7 . 56 AC 16 Tc= 13 . 3 MIN CN= 77 14 12 SC5 TR-20 METHOD u 10 TYPE III 24-HOUR � _ g RAINFALL= 5 . 3 IN a _j 6 PEAK= 20 . 2 CFS 4 @ 12 . 17 HRS UOLUI,,IE= 1 . 46 AF 2 am Ln m Lt-) 0 Ln o if) m LA 0 r m CD m -- - N N M r 1 T IT LO n 0 TIME (hours) ) ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN T__epared by David E . Ross Associates, Inc . 21 Jul 95 idroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems - 3ACH 1 SWALE BETWEEN WETLAND AND CATCHBASIN Qin = 1 .4 CFS @ 12 . 34 HRS, VOLUME= . 15 AF bout= 1 .4 CFS @ 12 . 37 HRS, VOLUME= . 15 AF, ATTEN= Oo, LAG= 2 . 3 MIN DEPTH END AREA DISCH (FT) (SO-FT) (CFS) 2 ' x 1' CHANNEL STOR-IND+TRANS METHOD 0 . 0 0 . 0 0 . 0 SIDE SLOPE= 2 ' / ' PEAK DEPTH= . 51 FT . 1 . 2 . 1 n= . 1 PEAK VELOCITY= 1 . 2 FPS . 2 . 4 . 3 LENGTH= 95 FT TRAVEL TIME = 1 . 3 MIN . 3 . 6 . 6 SLOPE= . 024 FT/FT SPAN= 10-16 HRS, dt= .02 HRS .4 1 . 0 1 . 0 . 6 1 . 4 1 . 8 . 8 1 . 9 2 . 8 1 . 0 2 . 5 4 . 0 REACH I DISCHARGE SWALE BETWEEN WETLAND AND CATCHBASIN 9 I B +' 6 J .� 5 = f y .4 w 3 � 2 x 1 ' CHANNEL SIDE SLOPE= 2 '/' n= . 1 L=95' S= . 024 i .pm Lo C L C Ln C LA C CS) - N N m m d DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 4.droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems REACH 1 INFLOW & OUTFLOW SWALE BETWEEN WETLAND AND CATCHBASIN 1 . 4 1 . 3 ! s 2' x 1 ' CHANNEL 1 . 2 �s SIDE SLOPE= 2 '/ ' r n= . 1 L=95' S= . 024 TOR-IND+TRANS METHOD 7 VELOCITY= 1 . 2 FPS 3 6 �t TRAVEL= 1 . 3 MIN o . 5 j 3 Gin= 1 . 4 CFS 4 rJr l` Uout= 1 . 4 CFS 2 i - � 3 MIN r 1 N m m \t d- LCD — T-- TIME (hours) ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN rrepared by David E. Ross Associates, Inc. 21 Jul 95 ,droCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems AND 1 AREA OF PONDING ABOVE PARKING LOT Qin = 1 . 5 CFS @ 12 . 21 HRS, VOLUME= . 11 AF )out= 1 . 1 CFS @ 12 . 37 HRS, VOLUME= . 09 AF, ATTEN= 240, LAG= 9 . 1 MIN ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 1428 CF 243 . 5 350 0 0 PEAK ELEVATION= 244 . 6 FT 243 . 9 500 170 170 FLOOD ELEVATION= 245 . 0 FT 244 . 0 600 55 225 START ELEVATION= 243 . 5 FT 244 . 1 700 65 290 SPAN= 10-16 HRS, dt= . 02 HRS 245 . 0 3500 1890 2180 ROUTE INVERT OUTLET DEVICES 1 P 244 . 3 ' 2 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H^1 . 5 C=2 . 79, 2 . 93, 3 . 06, 0, 0, 0, 0, 0 POND 1 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 .2 .3 .4 .5 . 6 . 7 . 8 . 9 243 . 5 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 . 18 244 . 5 ' . 50 . 92 1 .41 1 . 97 2 . 62 3 . 33 POND 1 DISCHARGE AREA OF PONDING ABODE PARKING LOT 2 .45 . 0 244 . 9 _ 244 .8 244 . 7 - 244 . 6 - - c- 244 . y J 244 . 4 z 244 . 3 z-"2' BROAD-CRESTED- RECTANGULAR LJEIR - - - - 24,1 . 2 - - - - - - - - - - - �- 244 . 1 244 . 0 w 243 . 9 Li 243 . 8 - 243 . 7 243 . 6 4 . J0 N tD co 0 cv d- tD OD 0D © N CS) - N Rl N N N m m DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN 21 Jul 95 "repared by David E. Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 A m lied Microco uter Systems POND 1 INFLOW & OUTFLOW AREA OF PONDING ABOVE PARKING LOT 1 . 4 LPE ND METHOD 1 . 3 = 1428 CF 1 . 2 1 . 1 244 .6 FT 9 = 1 . 5 CFS U .8 = 1 . 1 CFS 7 = 9 . 1 MIN 3 .6 0 5 LL -4 J 0 . 0 m U-) m LO m LO m LA m LO m m m cv N m m 'q 'q n n 0 TIME (hours) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN 21 Jul 95 repared by David E . Ross Associates, Inc . droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems, OND 2 CATCHBASIN 4 Qin = 3 . 6 CFS @ 12 . 05 HRS, VOLUME= . 30 AF Qout= 3 . 6 CFS @ 12 . 06 HRS, VOLUME= . 30 AF, ATTEN= Oo, LAG= .2 MIN ELEVATION AREA INC. STOR CUM.STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 26 CF 237 . 2 13 0 0 PEAK ELEVATION= 239 . 2 FT 240 . 8 13 47 47 FLOOD ELEVATION= 242 .4 FT 241 . 3 4 4 51 START ELEVATION= 237 . 2 FT 241 . 4 100 5 56 SPAN= 10-16 HRS, dt= . 02 HRS 242 . 4 200 150 206 ROUTE INVERT OUTLET DEVICES 1 P 237 . 2 ' 12" CULVERT n= . 015 L=123 ' S= . 00911 ' Ke= . 5 Cc= . 9 Cd= . 6 2 P 241 . 3 ' 30' BROAD-CRESTED RECTANGULAR WEIR Q=C L H^1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 POND 2 TOTAL DISCHARGE (CFS) vs, ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 . 7 . 8 9 237 . 2 0 . 0 0 . 0 . 1 . 3 .6 . 8 1 . 2 1 .5 1 . 9 2 . 2 238 . 2 2 . 5 2 . 8 3 . 0 3 . 1 3 .0 3 .1 3 . 2 3 . 3 3 .4 3 . 5 239 . 2 3 . 6 3 . 6 3 . 7 3 . 8 3 . 9 4 . 0 4 . 0 4 . 1 4 .2 4 . 3 240 . 2 4 .3 4 .4 4 . 5 4 . 5 4 . 6 4 . 7 4 . 7 4 . 8 4 . 8 4 . 9 241 . 2 5 . 0 5 . 0 7 . 6 12 . 2 18 .1 25 . 2 33 . 1 42 . 1 51 . 9 62 . 5 242 . 2 73 . 9 86 . 0 98 .4 111 . 4 POND 2 DISCHARGE CATCHBASIN 4 J-1 ood_ e I ev ._ - - - - - - - _ - 242 . 2 241 . 7 - BROAD-CRESTED RECTANGULAR WEIR 2 41 . 2 i - - - - 240 .7 z 240 .2 239 . 7 Q 239 .2 w 238 . 7 w 238 . 2 -11 237 . 7 ' 12" CULUERT 237 .2 m 0 m m m m m m m m m N M 17 Ln k.o r- 03 m m - DISCHARGE (cfs) )ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN prepared by David E. Ross Associates, Inc . 21 Jul 95 [ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 2 INFLOW & OUTFLOW CATCHBASIN 4 3 . 6 3 . 4 STOR-IND METHOD 3 .0 PEAK STOR= 26 CF 2 . 6 PEAK ELEU= 239 . 2 FT 2 . 6 r, 2 . 4 10 2 .2 Gin= 3 . 6 CFS 2 . 0 Qout= 3 . 6 CFS 1 .6 LAG= . 2 MIN 1 .4 J 1 . 2 LL . 6 . 4 . 2 N m r 1 I- -T LCD Lfl 0 .- � TIME (hours) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 . 00 000736 (c) 1986-1995 Applied Microcomputer Systems _ OND 3 CATCHBASIN 6 Qin = 2 . 2 CFS @ 12 . 03 HRS, VOLUME= . 11 AF Qout= 2 . 2 CFS @ 12 . 04 HRS, VOLUME= . 11 AF, ATTEN= Oo, LAG= . 3 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 21 CF 235 . 8 13 0 0 PEAK ELEVATION= 237 .4 FT 238 . 9 13 40 40 FLOOD ELEVATION= 240 . 5 FT 239 .4 4 4 45 START ELEVATION= 235 . 8 FT 240 . 0 2600 781 826 SPAN= 10-16 HRS, dt= . 02 HRS 240 .5 7600 2550 3376 ROUTE INVERT OUTLET DEVICES 1 P 235 . 8 ' 12" CULVERT n= . 015 L=120 ' 5= . 0017 ' / ' Ke= . 5 Cc= . 9 Cd= . 6 POND 3 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 . 5 . 6 7 . 8 . 9 235 . 8 0 . 00 . 02 . 07 . 16 . 28 .44 . 62 . 82 1 .04 1 . 26 236 . 8 1 . 47 1 . 67 1 . 82 1 . 88 1 . 93 2 . 08 2 . 22 2 .36 2 .48 2 . 60 237 . 8 2 . 72 2 . 83 2 . 93 3 . 04 3 . 14 3 . 23 3 . 33 3 .42 3 .51 3 . 59 238 . 8 3 . 68 3 . 76 3 . 84 3 . 92 4 . 00 4 . 07 4 . 15 4 .22 4 . 29 4 . 36 239 . 8 4 .43 4 . 50 4 . 57 4 . 64 4 . 70 4 . 77 4 . 83 4 . 89 POND 3 DISCHARGE CATCHBASIN 6 240 . 3 - rl i 239 . 5 239 . 3 f 238 .8 a 238 . 3 237 . 8 237 .3 -" w 236 . 8 236 . 3 235 .8 ,' 12" LULU RT CD to m Ln 0 Ln m Ln DISCHARGE Ccfsa ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN Drepared by David E. Ross Associates, Inc . 21 Jul 95 vdroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 3 INFLOW & OUTFLOW CATCHBASIN 6 2 . 2 2 . 0 STOR-IND METHOD 1 . 8 PEAK STDR= 21 CF 1 . 6 - PEAK ELEU= 237 .4 FT n 1 . 4 Qin= 2 . 2 CFS u 1 . 2 Qout= 2 . 2 CFS 1 . 0 LAG= . 3 MIN 0 8 � 6 . 4 2 - © 110 Ln m tit m m LCD m M m �Y -\T LCD LCD tD TIME (hours) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN ^repared by David E. Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 4 CATCHBASIN 2 Qin = 7 . 9 CFS @ 12 . 04 HRS, VOLUME= . 53 AF Qout= 7 . 8 CFS @ 12 . 05 HRS, VOLUME= . 53 AF, ATTEN= Oa , LAG= 3 MIN ELEVATION AREA INC.STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 63 CF 235 .5 13 0 0 PEAK ELEVATION= 240 . 3 FT 239 . 8 13 56 56 FLOOD ELEVATION= 241 . 0 FT 240 .3 4 4 60 START ELEVATION= 235 .5 FT 241 . 0 2400 841 902 SPAN= 10-16 HRS, dt= . 02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 235 . 5 ' 12" CULVERT n= . 015 L=30 ' S= . 0111 ' Ke= .5 Cc= . 9 Cd= . 6 2 P 240 . 3 ' 25 ' BROAD-CRESTED RECTANGULAR WEIR Q=C L H"1. 5 C=2 . 62, 2 . 68 , 0, 0, 0, 0, Of 0 POND 4 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 .5 . 6 . 7 . 8 . 9 235 . 5 0 . 00 . 03 . 14 .31 .53 . 80 1 . 09 1 .41 1 . 74 2 . 07 236 .5 2 . 39 2 . 69 2 . 94 3 . 08 3 .18 3 . 40 3 . 61 3 . 80 3 . 99 4 . 17 237 . 5 4 . 34 4 . 50 4 . 66 4 . 81 4 . 96 5 . 10 5 . 24 5. 38 5 .51 5 . 64 238 .5 5 . 77 5 . 89 6 . 02 6 . 13 6 .25 6 . 37 6 . 48 6 . 59 6 .70 6 . 81 239 .5 6 . 91 7 . 01 7 . 12 7 . 22 7 .32 7 .42 7 . 51 7 . 61 7 . 70 9 . 87 240 . 5 13 .75 18 . 74 24 . 64 31 . 32 38 . 83 47 . 05 POND 4 DISCHARGE CATCHDASIN 2 241 . 0 _ _� ----__ 240 .5 - 25' BR�R�1-�RE�TEb_ RECTANGULAR - - 246 .0 ; 239 .5 239 .0 - r� 238 .5 ° 238 .0 l Q 237 .5 f i w 237 .0 ' � s w 236 .5 - 236 .0 / 12" CULUERT 235 .5m Ln m Ln m Ln m Ln m i.n -- -- N N m m � V DISCHARGE (cfs) ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN rrepared by David E . Ross Associates, Inc . 21 Jul 95 4droCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 4 I1\1FLOW & OUTFLOW CATCHBASIN 2 7 . 5 7 . 0 STOR-IND METHOD 6 . 5 PEAK STOR= 63 CF 6 .0 PEAK ELEU= 240 . 3 FT 5 .5 i 5 . 8 4 4 .5 Qin= 7 . 9 CFS 4 . e bout= 7 . 8 CFS 3 . 5 LAG= . 3 MIN 0 3 .0 -1 2 . 5 L- 2 .0 - 1 . 5 1 . e 5 - -- 0 am Ln m Ln m u� m Ln @ Ln O In m TIItiE (hours) r ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN prepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems OND 5 CATCHBASIN 3 Qin = 2 . 1 CFS @ 12 . 03 HRS, VOLUME= . 11 AF Qout= 2 . 1 CFS @ 12 . 03 HRS, VOLUME= . 11 AF, ATTEN= Oo, LAG= .1 MIN Qpri= 2 . 1 CFS @ 12 . 03 HRS, VOLUME= . 11 AF Qsec= 0 . 0 CFS @ 0 .00 HRS, VOLUME= 0 . 00 AF ELEVATION AREA INC. STOR CUM. STOR STOR-IND METHOD (FT) (SF) (CF) (CF) PEAK STORAGE = 11 CF 237 . 9 13 0 0 PEAK ELEVATION= 238 . 7 FT 239 . 7 13 23 23 FLOOD ELEVATION= 241 . 0 FT 240 .2 4 4 28 START ELEVATION= 237 . 9 FT 241 . 0 1020 410 437 SPAN= 10-16 HRS, dt= . 02 HRS ROUTE INVERT OUTLET DEVICES 1 P 237 . 9 ' 12" CULVERT n= . 015 L=65' S= . 04551 / ' Ke= . 5 Cc= . 9 Cd= . 6 2 S 240 . 2 ' 40' BROAD-CRESTED RECTANGULAR WEIR Q=C L H^1 . 5 C=2 . 62, 2 . 68, 0, 0, 0, 0, 0, 0 Primary Discharge I 1=Culvert Secondary Discharge �-2=Broad-Crested Rectangular Weir POND 5 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 .5 . 6 . 7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 .37 . 63 . 94 1. 30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 .31 4 . 47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 8 . 52 14 . 72 22 . 70 32 . 12 42 . 78 54 . 79 240 . 9 67 . 92 82 . 11 POND 5 PRIMARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 . 3 .4 5 .6 .7 . 8 . 9 237 . 9 0 . 00 . 04 . 17 .37 . 63 . 94 1. 30 1 . 67 2 . 05 2 .40 238 . 9 2 . 67 2 . 93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 . 31 4 .47 239 . 9 4 . 63 4 . 78 4 . 93 5 . 07 5 . 21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 240 . 9 5 . 98 6 . 09 POND 5 SECONDARY DISCHARGE (CFS) vs ELEVATION FEET 0 . 0 . 1 . 2 .3 .4 . 5 . 6 . 7 . 8 . 9 237 .9 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 238 . 9 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 0 . 00 239 . 9 0 . 00 0 . 00 0 .00 0 .00 3 . 31 9 . 37 17 . 22 26 .51 37 . 05 48 . 93 240 . 9 61 . 94 76 . 02 ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN Drepared by David E. Ross Associates, Inc. 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 5 DISCHARGE CATCHBASIN 3 pr i sectot. 240 . 9 240 .7 240 . 5 240 . 3 RESTED RECTANGULAR WEIR sec +' 240 . 1 - 239 .9 f 239 . 7 , 0 239 . 5 - H 239 . 3 Q 239 . 1 t 5 238 .E w 238 . 7 i w 238 . 5 238 . 3 238 . 1 12'' CULVERT pr,i 237 .90L m Ln 0 Ln m In 0 Ltd m Ln a In m N N m m IT T Ln Ln lD 0 I`- rl- 0] DISCHARGE (cfs) POND 5 INFLOW & OUTFLOW CATCHBASIN 3 2 . 0 1 8 STOR-IND METHOD PEAK STOR= 11 CF 1 .6 PEAK ELEV= 230 . 7 FT 1 . 4 `0 1 .2 Qin= 2 . 1 CFS flout= 2. 1 CFS 1 .0 Op,- I= 2 . 1 CFS o .0 Qsec= 0. 0 CFS .6 LAG= 1 MIN .4 . 2 O Om ,n Ln m Ln m ,n m m m — — N N m m d- �t m m 0 TIME (hours) I ita for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5.3 IN Prepared by David E. Ross Associates, Inc . 21 Jul 95 I jdroCAD 4 . 00 000.736 (c) . 1986-1995 Applied Microcomputer Systems I )ND 6 DMH-SOUTH Qin = 8 . 0 CFS @ 12 . 05 HRS, VOLUME= . 54 AF )out= 8 . 0 CFS @ 12 . 05 HRS, VOLUME= . 54 AF, ATTEN= 0%, LAG= 3 MIN ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD _ (FT) (SF) (CF) (CF) PEAK STORAGE = 64 CF 235 . 0 13 0 0 PEAK ELEVATION= 240 . 0 FT 240 . 0 13 65 65 FLOOD ELEVATION= 242 . 0 FT 241 . 0 4 9 74 START ELEVATION= 235 . 0 FT 242 . 0 5 5 78 SPAN= 10-16 HRS, dt= . 02 HRS # ROUTE INVERT OUTLET DEVICES 1 P 235 . 0' 12" CULVERT n= .015 L=20 ' 5= . 02 ' / ' Ke= .5 Cc= . 9 Cd= . 6 POND 6 TOTAL DISCHARGE (CFS) vs ELEVATION FEET 0 .0 - 1 2 3 4 5 6 7 . 8 . 9 235 . 0 0 . 00 . 04 . 17 .37 . 63 . 94 1 . 30 1 . 67 2 . 05 2 .40 236 . 0 2 . 67 2 .93 3 . 16 3 . 38 3 . 59 3 . 78 3 . 96 4 . 14 4 .31 4 .47 237 . 0 4 . 63 4 .78 4 . 93 5 . 07 5 . 21 5 . 35 5 .48 5 . 61 5 . 73 5 . 86 238 . 0 5 . 98 6 . 09 6 . 21 6 . 33 6 .44 6 .55 6 . 66 6 . 76 6 . 87 6 . 97 239 . 0 7 . 07 7 . 17 7 .27 7 .37 7 .46 7 .56 7 . 65 7 . 75 7 . 84 7 . 93 240 . 0 8 . 02 8 . 11 8 . 19 8 . 28 8 . 37 8 .45 8 . 54 8 . 62 8 . 70 8 . 78 241 . 0 8 . 86 8 . 94 9 . 02 9 . 10 9 . 18 9 . 26 9 .34 9 .41 9 .49 9 . 56 242 . 0 9 . 64 POND 6 DISCHARGE DIIH-SOUTH 242 . 0 241 . 5 241 . 0 240 .5 +' 240 .0 239 .5 239 . 0 0 238 .5 238 . © �• Q 237 .5 f ' L' 237 . 0 - -J 236 .5 - W 236 . 0 _ - 235 .5 _ 12" CLILUERT 235 .qmJLnmLC� mLnmLCimL� mLnmLn � LnmLc� mLn . . . . . . . . . . . . . . . . DISCHARGE (cfs) ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR RAINFALL= 5 .3 IN 21 Jul 95 prepared by David E. Ross Associates, Inc. a droCAD 4 . 00 000736 c 1986-1995 Applied Microcom uter Systems POND 6 INFLOW & OUTFLOW DMH-SOUTH 8 . 0 7 . 5 STOR-IND METHOD 7 PEAK STOR= 64 CF 6 . 5 PEAK ELEU= 240 FT 6 .0 5 .5 5 . 0 Qin= 8 . 0 CFS u Gout= 8. 0 CFS 4 . 0 3 .5 LAG= . 3 MIN 0 3 .0 2 -1 2 .5 LL 2 .0 1 . 5 I .D - 5 _ 0 .am Ln @ to m Ln m Ln m Ln Ln o m m — CV N m m d �f- Ln r t D TIME (hours) r ata for DEVELOPMENT ASSOCIATES; 25-YEAR COMPLETE SYSTEM TYPE III 24-HOUR. RAINFALL= 5 .3 IN prepared by David E . Ross Associates, Inc . 21 Jul 95 ydroCAD 4 00 000736 (c) 1986-1995 Applied Microcomputer Systems POND 7 INFLOW & OUTFLOIJ DMH-NORTH 28 18 STOR-IND METHOD PEAK STOR= 300 CF 16 PEAK ELEV= 243 . 7 FT 14 ci- 12 Qin= 21 . 0 CFS Qout= 21 . 0 CFS 18 LAG= . 7 MIN 3 8 6 4 2 em t 1 m Ln m m r7 T d- L I) n 0 T ^ — r--TIME (hours)