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2010/10/13 - Drainage Analysis - 1801 Turnpike Street
�r,.. %//iii„... ,,,,,rr,,,,,,,, ,/%ail//////rrrrr::/� /..,ii. �y I/.. /< ;, ,,. ,. ✓ / ''„ ,,... c l / ,/,. o, �: ./,: �l /, /r.. �, �b/ 'v// 1,/,,,� ,r ,/ /,,.. / ,.. r,% � � ./r ,,� f,. / ✓ /DO .r/, �,. %J !l _ / %/, ,,...�/�ii,„i% rrr 1, r.. ✓/ v, l � ( ,/ ,/ ,,,,,,// i�a „%%.., ✓,:,,/ / ,ru:/, ��, ,/. /...... �i, �//, � :,,: .,. � �/ ,/ /,.. %, I� /. J vn gp, rr / / ,a/ r 'NS/ ,aa r/ gg, r,a r // rId �i a //rr. // // El" r / a r Vi Z r i t l ` 1 Drainage Analysis For Facility Expansion Located at 1801 Turnpike Street North Andover, MA By Land Planning, Inc. 214 Worcester Street N. Grafton, Massachusetts 01536 October 13, 2010 1.0 INTRODUCTION Land Planning Inc. has evaluated the hydrologic impacts for the proposed expansion of the property located at 1801 Turnpike Street in North Andover, Massachusetts. Included in this report is the proposed method to mitigate any additional runoff from the proposed development. The supporting hydrologic calculations are at the end of this report. Used in the preparation of this hydrologic model were the following: Soil Conservation Service (SCS) Technical Release 55 (for Times of Concentration and curve Numbers); NRCS soil survey data, results of soil tests performed by Land Planning, Inc., a topographic survey, images provided by Mass CIS, and HydroCAD software. The existing and proposed site conditions were analyzed for the 2, 10, and 1 00- year storms for the hydrologic analysis. The following are the rainfall intensities used for each storm event. Stormy Events Storm Event 24 Hour Rainfall (Inches) year 3.20 10 year 4.70 100 ear 5.70 Table 1 2.0 EXISTING CONDITIONS The property is 4.18 acres in area containing an existing 4 story nursing home with it's associated parking and driveway areas. The property is located on the southerly side of Turnpike Street in North Andover, Massachusetts. Approximately 43% of the existing site is impervious. The remainder of the site is a mix of turf grass, plantings, and woodland. The site is bounded on the north by Turnpike Street, on the east by a residential development, on the south by the Harold Parker State Forest, and on the west by a wetland and intermittent stream. The site exists in two watersheds. The existing developed portion of the site slopes north and easterly to the drainage system within Turnpike Street. The remainder of the site, west of the building, slopes northerly and westerly toward a wetland adjacent to an intermittent stream. The soils within the area of analysis include canton fine sandy loam and a small area of Freetown muck located in the wetland area. The canton soil belongs to hydrologic soil group B and the Freetown soil belongs to hydrologic soil group D. Soil testing by Land Planning, Inc. found the parent material to be an extremely stony loamy fine sand with a depth to groundwater exceeding 9 feet. 3.0 PROPOSED CONDITIONS The development proposal for the property is to expand the existing building by 27834 ft2. An additional parking area of 13 spaces is also As a result of proposed. the redevelopment, 47% of the site will be rendered impervious. Runoff from the proposed roof and parking area will be collected and discharged to a 756 ft2 infiltration system to be constructed of Cultec chambers. The runoff from the pavement area will be pretreated through a Stormceptor inlet prior to entering the infiltration system. Permanent structural BMP's provided within the drainage system include: a Stormceptor 450i catch basin and an infiltration system. 4.0 ANALYSIS: The area of the proposed new development lies to the west of the existing development. This proposed expansion area is located within a different watershed from the existing development and it's drainage system. This analysis is confined to the westerly watershed containing the expansion. This watershed has been divided into 2 subcatchments; S1 and S2. Subcatchment S1 is the area tributary to an old borrow pit designated as an Isolated Vegetated Wetland. Subcatchment S2 is the remaining area tributary to an existing culvert that crosses Turnpike Street northwest of the site. The stormwater management standards, relative to flooding and runoff rates, are different for the two subcatchments. We have determined that the borrow pit at the bottom of subcatchment S1 is capable of storing all runoff for all storm events up to and including the 100 year storm. Therefore, because there is no discharge from the borrow pit, the standard for subcatchment S1 is limited to ensuring that there is no increased potential for flooding. Total runoff volume controls the stormwater management system design in subcatchment S1, while peak runoff rates control the system design in subcatchment S2. The goal of the stormwater management system proposed is to ensure that there is no increase in peak runoff rates, no increase in flooding potential, and no degradation of stormwater quality downstream of the site. These goals are achieved by directing the site runoff from the proposed impervious areas to an infiltration system. The stormwater management system has been sized to attenuate flow rates for all storm events up to and including the 100 year storm. 5.0 SUMMARY: Storm Events 2 Year Storm 10 Year Storm 100 Year Storm Subcatchment Pre Post Pre Post Pre Post S1 (to borrow pit) 94.9 ft 94.7 ft 90.2 ft 95.2 ft 97.5 ft 97.5 ft S to culvert 0.12 cfs 0.11 cfs 0.41 cfs 0.39 cfs 0.90 cfs 0.86 cfs Table 2 5.0 CONCLUSION; From this analysis we conclude that the development of this site will not increase peak run-off rates or increase flooding potential within the resource areas for the 2 year, 10 year, and 100 year storms. The proposed drainage system as designed complies with all Standards of the Stormwater Management requirements of the wetland Protection Act. Pre Development Drainage Analysis AL Hd. Grou 1$2 --�- —� i To cutvert)--, \ or � . �Ta e rsst�71/ / .. 100 104 , f I � � � J■(J ,� � A A I � J r isti g eleotric box be �t 1 reloTate o f ` n/f Common olth of Massadwsetts\ Harold rker State Forest 1 M. nq e�w F1 0 ExistingE 0 4 St( I Nursing & Retirr f f Imo'F� loading Existing Refuse ' Storage Area Pre Development Drainage Areas October 13, 2010 Scale: 1"=60' I �r 1 j j' f 1 i fr IYI4 f l J r f tvnwe�r.'erwomw�::. try 00 To De To Culvert, Depressuioln ��mrorroi Sbca Read old Link Drainage Diagram for pre development �m � Tapered y Land PlanningInc.. 10/5/2010 ydr 7.00 slr 661 1986-2�0 �Applied Microcomputer Systems i pre development Type 111 24-hr year Rainfall=3.24" Prepared by Land Planning Inc. H droCAD@ 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/5/2010 Time span=5,00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UHI SCS Reach routing by Stor-Ind+Trans method Pond routing by Stor-Ind method Subcatchment SDI: To Depression Runoff Area=47,302 sf Runoff Depth=0.29" Flow Length=285' Tc=8.3 min CN=58 Runoff=o.18 cfs 0.026 of Subcatchment S2: To Culvert Runoff Area=13,083 sf Runoff Depth=0.42" Flow Length=160' Tc=4.6 min CN=62 Runoff=0.12 cfs 0.011 of Pond PI: Depression Peak Elev=94.85' Storage=1,014 cf Inflow=0.18 cfs 0.026 of Discarded=0.01 cfs 0.003 of Primary=0.00 cfs 0.000 of oufflow=0.01 cfs 0.003 of Total Runoff Area=1.386 ac Runoff Volume 0.037 of Average Runoff Depth =0.32" pre development Type 11124-hr 2 year rainfal1=3.20" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 986-2003 Apelied Microcom uter Systems 10/5/2010 Subcatchment S1: To Depression Runoff 0.18 cfs @ 12.23 hrs, Volume-- 0.026 af, Depth- 0.29" Runoff by SCS TR-20 method, UH=SCS, Time Span- 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 year Rainfall=3.20" Area sf CN Description 30,525 55 Woods, Good, HSG B 957 98 Paved parking & roofs 15,820 61 >75% Grass cover, Good, HSG B 47,302 58 Weighted Average Tc Length Slope Velocity Capacity Description min _(feet)__ cfs 6.3 85 0.1100 0.2 Sheet Flow, Grass: Dense n=0.240 P2= 3.20" 2.0 200 0.1100 1.7 Shallow Concentrated Flow, Woodland Irv= 5.0 fps 8.3 285 Total Subcatchment S1: To Depression Hydrograph ..._......... - - Runoff 0.19 .........----- U.18 cfs --------- --- --__.------- ---- ------ 0.18"" 0.17- Type III 24whryear 0.16 ---------------_. ...... ..........-..... .._.-.--...... _._0.15 0.14- Runoff Area47 02sf0.13 E E 0-.........._.........__........_..._._ , i f N 1 e0-10-1 r - - off..... o 0�0.11- --- __.. _R.U- _..._ - - 26,af_.. �_._._..r...._�� ................................. i._. .._... _�_ f_---•---•-_._. E_ 1-0 ...... ....... 3 0.1 ': `Run' ofi�j Depth=TMO,29" U. 0.09 ! ! { i i �285 • I i i = i EFloW r1 t 0.07----.---.---- - r o 0.06, -------------- E 0.05- . --- -........ --r f -- - - _....-- —_ __ - -.-------•- -----.---•----- ------ - - f •. f N" S ❑.04- 01 t 0.03. f ' i 1 _..___. i E 0.01 -----------..--------- ........... » _.. 0 _ 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) pre development Type 11124-hr 2 year Rair�fafi=3.20" Prepared by Land Planning Inc. H droCADQ 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/5/2010 Subcatchment S2: To culvert Runoff -- 0.12 cfs a@ 12.10 hrs, Volume 0.011 af, Depth= 0,42" Runoff by SCS TR-20 method, UH=SCS,Time Span 5.00-20.00 hrs, dt=0.05 hrs Type III 24-hr 2 year Rainfall�3.20" Area sf CN Description 71132 55 Woods, Good, HSG B 1,737 77 Woods, Good, HSG D 704 98 Paved parking & roofs 3,260 61 >75% Grass cover, Good, HSG B 250 80 >75% Grass cover, Good, HSG D 13,083 62 Weighted Average Tc Length Slope Velocity Capacity Description (min) 3.6 40 0.1000 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 1.0 120 0.1600 2.0 Shallow concentrated Flow, Woodland Kv 5.0 fps 4.6 160 Total Subcatchment S2: To Culvert Hydrograph o. 3- -- ....... .___ �_..__--- ¢ _ __� ............. _.. iW.- - - ._...... �_._.. ----....__¢ - : - a t] T i Ir ❑.1 G L'S' f —Runoff 0.12- �' a 24=hry6ar 0.11 0.1 ai nfall 3■20 i i �._.._...._.._...-.___._........................_-_..__._.--_-__ i_ _.__.__...._. _._.T� _` �._ � r 0.09 �_..W.__.._ Runo f Area 3 083 --------_.. -- E TRU Koff o 1 m e 0.01 1 "of N2 0.07 .-------------- _; _ -- ;-- --- -- -- 120 3 ! ;'Run ot De' thOAMM211 ; LL 0.06 a € 0,05� i Flowl Lengt 1 60' i I r f i 0.04 i f Tc- 4 8 Mn .: ......----------- ------------- -------- --------- -----...-- .-- -..------- .---- 2-------- - GN� 6 {{//''���� //JJ'�� _- �... 0.01 ' 1 0- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) F 5 pre development Type 111 24-hr 2 year Rainfal1=3.20" Prepared by Land Planning Inc. tLdroCADO 7.00 sln 001681 @ 1986-2003 Apelied Microcomputer Systems 10/5/2010 Pond PI: Depression Inflow Area = 1.086 ac, Inflow Depth = 0.29" for 2 year event Inflow -- 0.18 cfs a@ 12.23 hrs, Volume= 0.026 of Outflow - 0.01 cfs a@ 20.00 hrs, Volume- 0.003 af, Atten= 97%, Lag=466.2 min Discarded - 0.01 cfs a@ 20.00 hrs, Volume= 0.003 of Primary = 0.00 cfs a@ 5.00 hrs, Volume= 0.000 of Routing by Star-Ind method, Time Span= 5.00-20.00 hrs, dt=0.05 hrs Peak Elev= 94.85' a@ 20.00 hrs Surf.Area= 1,011 sf Storages 1,014 cf Plug-Flow detention time= 265.0 min calculated for 0.003 of(112% of inflow) Center-of-Mass det. time= 125.5 min ( 997.2- 871.7 ) # Invert Avail.Stora e Storage Descri Lion 1 93.70' 9,191 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store feet s -ft) (cubic-feet) ( et 93.70 0 20 0 0 94.00 188 31 31 96.00 21135 21323 21354 98.00 41702 61837 91191 # Routing Invert outlet Devices 1 Primary 97.60' 176.0 deg x 25.0' long Sharp-crested VeelTrap Weir C= 2.46 2 Discarded 0.00' 0.000375 fpm Exfiltration over entire Surface area Discarded outFlow Max=0.01 cfs a@ 20.00 hrs HW=94.85' (Free Discharge) 't 2=Exfiltration (Exfiltration controls 0.01 cfs) Primary outFlow Max=0.00 cfs a@ 5.00 hrs HW=93.70' (Free Discharge) 1 --Il=Sharp-crested Vee/Trap Weir ( controls 0.00 cfs) pre development Type 1!1 24-hr year f2airrfa!l=3.20" Prepared by Land Planning Inc. H droCAD@ 7.00 sln 001661 @ 1986-2003 Applied Microcomputer S stems 101512010 Pond PI: Depression Hydrograph 0.2 - E 0.18 cfs ~~~Inflow 0.19 ' E , Outflow - - - EDiscarded0.18- Primary- j nftoAre-a-mmil-.086- 0. 1s E 0.15 i i P a k .E e,,:v 94.8 S _ E _ --- - ---- -- _ .- 0.14 --- 1 — __......__.... 1_1014f-St"Ora0.13 g .� 0.12 i v0.111 E .-__.T._.-. -- - 31. 0.1 0 0.09 E [ E E 0.08" 0.07 i 0.06 l 0.05 1 _.._._.... _ .., s E ----- E i i 0.03 F- ----- ---- ;..._..------.__---- _..._.... tr. __ 1 E E E E i 0.02� E j E 0.01 cfs 0.00 cfs E 0" I T I I I I I I I I I I I I I I I I I f I f I I I s 0 1 I1 ` 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) pre development Type 11124-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001851 @ 1985-2003 A2plied Microcomputer Systems 10/5/2010 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment S1: To Depression Runoff Area=47,302 sf Runoff Depth=0.90" Flow Length=285' Tc=8.3 min CN=58 Runoff=0.97 cfs 0.081 of Subcatchment S2: To Culvert Runoff Area-=13,083 sf Runoff Depth=1.14" Flow Length=150' Tc=4.5 min CN=52 Runoff=0.41 cfs 0.028 of Pond PI: Depression Peak Elev=95.24' Storage=3,108 cf Inflow=0.97 cfs 0.081 of Discarded=0.02 cfs 0.009 of Primary=0.00 cfs 0.000 of outflow=0.02 cfs 0.009 of Total Runoff Area 1.356 ac Runoff Volume=0.110 of Average Runoff Depth=0.95" pre development Type Ill 24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.90 sln 001661 @ 986-2003 Applied Microcomputer S stems 10/5/2010 Subcatchment Sal: To Depression Runoff = 0.97 cfs a 12.14 hrs, Volume= 0.081 af, Depth= 0.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10 year Rainfall=4.70" Area sf CN Description 30,525 55 Woods, Good, HSG B 957 98 Paved parking & roofs 15,820 61 >75% Grass cover, Good, HSG B 471302 58 Weighted Average Tc Length Slope Velocity Capacity Description (min) ftsec) 6.3 85 0.1100 0.2 Sheet Flow, Grass: Dense n=0.240 P2� 3.20" 2.0 200 0.1100 1.7 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 8.3 285 Total Subcatchment SI: To Depression Hydrograph i _ 0.97 cfs 1 i ...--- ................ Runoff = i i T e 11124 r 'ioyear 's i � i ; i �� a nfall 411 + R('Jnoff A ea�47,302 sf I i k unoff = o[ me=0.081 'of i �y RU' off De th=Ov9O ,° Few [ 1 = } k € F I ow Le th 285 T. 8o3 ra n i € i I i i E € CN=68 i I i i � E 1 € 0- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) pre development Type H/ 24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Aeplied Microcomputer S stems 10/5/2010 Subcatchlment S2: To Culvert Runoff = 0.41 cfs a@ 12.08 hrs, Volume= 0.028 af, Depth= 1.14" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt=0.05 hrs Type III 24-hr 10 year Rainfall=4.70" Area sf C N Description 71132 55 Woods, Good, HSG B 11737 77 Woods, Good, HSG D 704 98 Paved parking & roofs 31260 61 >75% Grass cover, Good, HSG B 250 80 >75% Grass cover, Good, HSG D 13,083 62 Weighted Average Tc Length Slope Velocity Capacity Description (min) 3.6 40 0.1000 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 1.0 120 0.1600 2.0 Shallow Concentrated Flow, Woodland Kv= 5.0 f2s 4.6 160 Total Subcatchrnent S2: To Culvert Hydrograph ».. _. _ . 0.41 ds - --.�.... _...�..�_ Runoff __......_.0.42 ...... 0.4 i 0.38 Typ III ' 44ir 10 year _-------_.._._____.W�_.._ ._..............._..........w. __.._..__...._......-...-.-__-� _..._.._...._.._.-.-__ 0.34 ainfall 4.7o 0.32- ! E . � 1 i ......._..__.._.....__._..........._.........._._ - .._......__...i-----_--.... _...5-...�_ #.._._._.._ .._ 0.3 �......-..Ru-nof--Area--�`1-3--083_'Sf--;_ 0.28 - _ 17 �.�� RU noff of me-o.o28 E of 0.24 ................� ¢.... - --- ..... •-------- - - '- - -� € - -- _.. -.- .._.... _b E 3 0.22 -•--- -_ _..._- - -- €-------------------- �""� 0.2 Ru-1n of --fie th 4011411 0.18- Flow{ Lent 1 60' . i . o. 6 -- ._....-- •---- _...... 0.14.............. ------ ............. t------------------------------------------- T ......... 0.12 � � � � F .n'�In-- i 0.1 CN=62 1 — _ —--—a— — — j a _�T_. i 0.a8 ;.._.......... - _ ------ ------------ 0.06 17 f —__-.._...._. ----------_ __� -----•-----._ � 0.04 __ - ----....._...._.- ------------------- ------.------------- .—------------ 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) pre development Tye !ll 24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 986-2003 Applied Microcomputer S stems 10/5/2010 Pond P'l: Depression Inflow Area 1.086 ac, Inflow Depth - 0.90" for 10 year event Inflow = 0.97 cfs a@ 12.14 hrs, Volume= 0.081 of Outflow - 0.02 cfs a@ 20.00 hrs, Volume= 0.009 af, Atten= 98%, Lag=471.3 rain Discarded 0.02 cfs a@ 20.00 hrs, Volume 0.009 of Primary = 0.00 cfs 5.00 hrs, Volume- 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt=0.05 hrs Peak Elev= 96.24' a@ 20.00 hrs Surf.Area= 2,441 sf Storage- 3,168 cf Plug-Flow detention time= 262.0 min calculated for 0.009 of(11% of inflow) Center-of-Mass det. time= 145.4 min 983.8 - 838.4 } # Invert Avai I.Stora a Stora a Descri Lion 1 93.70' 9,191 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) cubic-feet 93.70 20 0 0 94.00 188 31 31 96.00 21135 21323 21354 98.00 41702 6,837 91191 # Routing I nvert outlet Devices 1 Primary 97.60' 176.0 deg x 25.0' long Sharp-crested VeefTrap Weir C= 2.46 2 Discarded 0.00' 0.000375 fpm EAltration over entire Surface area Discarded outFlow Maxim-0.02 cfs a@ 20.00 hrs HW=96.24' (Free Discharge) t--2=Exfiltration (Exfiltration Controls 0.02 cfs) Primary OutFlow Max=0.00 cfs a@ 5.00 hrs HW=93.70' (Free Discharge) t-1=Sharp-Crested VeefTrap Weir ( Controls 0.00 cfs) 5 pre development Type 11124-hr 70 year Raintall=4.74" Prepared by Land Planning Inc. H droCADO 7.00 sin 001661 @ 1966-2003 A lied Microcomputer Systems 10/5/201 p Pond Pl: Depression Hydrograph , ............. i � 1 f 7 cfs Inflow 1 ; E Oufflow Discarded Inflow Area=l .086 ac '".'Primary j j � 7 Pea' kElev=96.24' i � I i � E I � 1 Storage=3,168 of I € U- E i i EE E i ] I 0,00 cfs I I I , 0.02 cfs 0- ' , -------- 5 6 7 8 I 1 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) pre development Type IIl 24-fir 100 year Rainfall==.T4" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 Q 1986-2003 Applied Microcomputer Systems 10/5/2010 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment SI: To Depression Runoff Area=47,302 sf Runoff Depth=2.01" Flow Length=285' Tc=8.3 min CN=58 Runoff=2.40 cfs 0.182 of Subcatchment S2: To Culvert Runoff Area= 3,083 sf Runoff Depth=2.37" Flow Length=1 60' Tc=4.6 min CN=62 Runoff=0.90 cfs 0.059 of Pond P'l: Depression Peak Elev=97.45' Storage=7,294 cf Inflow=2.40 cfs 0.182 of Discarded=0.02 cfs 0.015 of Primary=0.00 cfs 0.000 of outflow=0.02 cfs 0.015 of Total Runoff Area='1.386 ac Runoff Volume=0.242 of Average Runoff Depth =2.�9" S pre development Type 111 24-hr 100 year Rainfall=6.70" Prepared by Land Planning Inc. H droCADO 7.00 sin 001661 @ 1986-2003.�A2pfled Microcomputer Systems 10/5/2010 Subcatchment S'l: To Depression Runoff = 2.40 cfs a@ 12.13 hrs, Volume= 0.182 af, Depth= 2.01" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type 111 24-hr 100 year Rainfall=6.70" Area (sf)__ CN Description 30,525 55 Woods, Good, HSG B 957 98 Paved parking & roofs 15,820 61 >75% Grass cover, Good, HSG B 47,302 58 Weighted Average Tc Length Slope Velocity Capacity Description (min) 6.3 85 0.1100 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 2.0 200 0.1100 1.7 Shallow concentrated Flow, Woodland Kv= 5.0 fps 8.3 285 Total Subcatchment S'l: To Depression Hydrograph 3 € i f i 2.40 cis Runoff Ty' pe'lll h= 4 ! year r r i r � F � i i i i ■ E ............... .......... ....... ..............2— ...................... i • .... .._......�..» a Runo, A e a 7l 021 sfnfa f ...�._...... u n offvo rn =o. 82;of C7 i f Ruhof De th -ZM ee,, r I . 1 �..,.......,.............i........._................................................... t } I ...............r...._..._..._...... ............... ..�. .o11U..Lelgth.�2851..... i TC�83 mlln f CN='68 3 � i 6 1 T I I " I 5 6 7 8 9 10 11 12. . . 13 14 15 16 17 18 19 20 Time (hours) pre development Type !!!24-hr 100 year Rainfall=G.74" Prepared by Land Planning Inc. H droCAD®7.00 sln 001661 @ 986-2003 Applied Microcomputer Sy stems 10/5/2010 Subcatchment S2: To Culvert Runoff - 0.90 cfs a 12.08 hrs, Volume= 0.059 af, Depth= 2.37" Runoff by SCS TR-20 method, UH=SCS, Time Span=5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 100 year Rainfall=6.70" Area sf CN Description 7,132 55 Woods, Good, HSG B 11737 77 Woods, Good, HSG D 704 98 Paved parking & roofs 31260 61 >75% Grass cover, Good, HSG B 250 80 >75% Grass cover Good, HSG D 13,083 62 Weighted Average Tc Length Slope Velocity Capacity Description (min) ft ftlsec) (cfs.) 3.6 40 0.1000 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 1.0 120 0.1600 2.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 4.6 160 Total Subcatchment S2: To culvert Hydrograph f 0.90 cfs i --Runoff i i i 1 s i I i E el I 124wh 100year yPl E 3 Rainfall 611011 E Runoffff A ea=13 083 sf unoff me=0.059'of "► i E i 3�3 yN I Vols o i Runof MINIIII 4 De th -2.37 i I `• . 0 i E s i r i e i F Iovu Le th l 80 i i o i E � i It Tc 4 E�8 n n CN=6, 2 E 0 1 c 1 1 f 1 4 1 1 1 1 t I I F t I 1 9 1 1 1 1 1 1 1 1 4 5 1 1 4 1 1 1 1 1 1 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) pre development Type 11124-hr 100 year Rainfall=6.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Applied microcomputer Systems 10/5/2010 Pond Pl: Depression Inflow Area = 1.086 ac, Inflow Depth = 2.01" for 100 year event Inflow 2.40 cfs a@ 12.13 hrs, Volume= 0.182 of Outflow = 0.02 cfs @ 20.00 hrs, Volume- 0.015 af, Atten= 99%, Lag=472.2 min Discarded = 0.02 cfs @ 20.00 hrs, Volume 0.015 of Primary _ 0.00 cfs a@ 5.00 hrs, Volume 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 97.45' a@ 20.00 hrs Surf.Area= 3,990 sf Storage= 7,294 cf Plug-Flow detention time= 272.8 min calculated for 0.015 of(8% of inflow) Center-of-Mass det. time= 156.6 min ( 976.0- 819.3 ) # I nvert Avai 1.Stora e Stora a Descril2tion 1 93.70' 9,191 cf Custom Stage Data(Prismatic) Listed below Elevation Suri'.Area Inc.Store Cum.Store (feet) -feet 93.70 20 0 0 94.00 188 31 31 96.00 21135 21323 21354 98.00 41702 6,837 91191 # Routing Invert Outlet Devices 1 Primary 97.60' 176.0 deg x 25.0' long Sharp-Crested VeefTrap Weir C= 2.46 2 Discarded 0.00' 0.000375 fpm Exflltration over entire Surface area Discarded outFlow Max=0.02 cfs a 20.00 hrs HW=97.45' (Free Discharge) t--2=Exfiltration (Exfiltration Controls 0.02 cfs) Primary outFlow Max=0.00 cfs a@ 5.00 hrs HW=93.70' (Free Discharge) t-1=Sharp-Crested VeefTrap Weir Controls 0.00 cfs pre development Type 11124-hr 100 year Rain all=6.74" Prepared by Land Planning Inc. H drOCADO 7.00 sln 001661 @ 1986-2003 Ap d Microcomputer Systems 101512010 Pond PI: Depression Hydrograph 2.40 cfs Inflow } E Outflow E ; I Discarded Inflow Aera- 1 .086 9: C Primary 2 -k Pea, Ete s � l E� 97-45 i Storagi 294 od .............. ............................................ ....... .............................. .............................................. ....... l � 1 � � E ; f I 1...................................-..................... i E I i E ' E I E i E 1 ' 0.02 cfs 0.00 cfs i i o 5 fi 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Post Development Drainage Analysis i f � 1 � 1 1 S2 t� To De ression (new S,Dla CS 1)b `�7 P 1 1 P Depression t 1 t i �� �� Link Drainage Diagram for post development �� Prepared Land Plan Planning Inc. 1 /14/ 01 [:Hyd:roCAD@Pr7.00 �In 00�1661 1986--2 AppliedMicrocomputer Systems I A. � I � f v A C Builders. Grou ` � � �,..,- '�� �''� W.�,.. - � Ufa • Ko ealve r t��`{ Uo f �• / r Ight � In iltratiof�} too to , r I 1 1 NW Areai834 tt' ~ F 127.39 .xlat€nq doe box to bo ref od n/f Common alth of Massachusetts\ Harold rker State 1~ore3t ' I �xkrW►q + buiktwsg (Shee r FI 0 � 0 Existing E 4 St( Nursing & Retirt f #oadlny loading Existing Refuse ' Storage Area F Post Development Drainage Areas October 13, 2010 Scale: 1"=60' Infiltration System Storage Calculations Length of chambers 33.16 Length of field 35.16 Width of field .............. ................21.50 area of area of number total area inc.vol.of inc. total system chambers end stone elevation of interior vol.of inc.vol.of incremental storage stone chamber of rows chambers stone volume volume bottom of stone 114.00 0.00 0.00 4 0.00 0.00 0.00 0.00 0.00 0.00 bottom of chambers 114.50 10.75 0.00 4 0.00 142.59 0.00 8.60 151.19 151.19 115.00 2.43 2.08 4 8.32 32.23 275.89 8.60 316.72 467.91 115.50 2.83 1.98 4 7.92 37.54 262.63 8.60 308.76 776.68 116.00 3.35 1.85 4 7.40 44.43 245.38 8.60 298.42 1075.09 116.50 4.19 1.64 4 6.56 55.58 217.53 8.60 281.71 1356.80 117.00 5.99 1.19 4 4.76 79.45 157.84 8.60 245.89 1602.69 top of chambers 117.33 6.29 0.20 4 0.80 83.50 26.53 5.68 115.70 1718.39 top of stone 117.83 10.75 0.00 41 0.00 142.59 0.00 8.60 151.19 1869.58 post development Type Ill 24-hr 2 year Rainfall=3.20" Prepared by Land Planning Inc. Fl droCADO 7.00 sin 001661 @ 1986-2003 Apelied Microcomputer Systems 10/14/2010 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment S1 a: To Depression Runoff Area=39,118 sf Runoff Depth=0.26" Flow Length=285' Tc=8.3 min CN=57 Runoff=0.13 cfs 0.020 of Subcatchment Sl b: (new Subcat) Runoff Area=9,132 sf Runoff Depth=2.60" Flow Length=147' Tc=2.5 min CN=96 Runoff=0.68 cfs 0.045 of Subcatchment S2: To Culvert Runoff Area=11,883 sf Runoff Depth=0.42" Flow Length=161' Tc=3.6 min CN=62 Runoff=0.11 cfs 0.010 of Pond 1 P: Infiltration Peak Elev=115,63' Storage=856 cf Inflow=0.68 cfs 0.045 of Discarded=0.04 cfs 0.037 of Primary=0.01 cfs 0.001 of, Outflow=0.05 cfs 0.038 of Pond PI: Depression Peak Elev=94.65' Storage=788 cf lnflow=0.13 cfs 0.021 of Discarded=0.01 cfs 0.003 of Primary=0.00 cfs 0.000 of Outflow=0.01 cfs 0.003 of Total Runoff Area = 1.380 ac Runoff Volume-0.075 of Average Runoff Depth =0.65" post development Type 11124-hr 2 year Rain all=3.20" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Aeefied Microcomputer Systems 10/14/2010 Subcatchment S'la: To Depression Runoff - 0.13 cfs a 12.31 hrs, Volume= 0.020 af, Depth= 0.26" Runoff by SCS TR-20 method, UH=SCS, Time Span- 5.00-20.00 hrs, dt= 0.05 hrs Type 111 24-hr 2 year Rainfall=3.20" Area sf C N Description 28,123 55 Woods, Good, HSG B 469 98 Paved parking & roofs 10,526 61 >75% Grass cover, Good HSG B 39,118 57 Weighted Average Tc Length Slope Velocity Capacity Description (min) 6.3 85 0.1100 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 2.0 200 0.1100 1.7 Shallow Concentrated Flow, Woodland Ky.7= 5.0 f s 8.3 285 Total Subcatchment S'l a: To Depression Hydrograph 0.14- - --- ------ w__. ....... - --- - _......._...... - 3 4.13cfs Runoff E t �. ----- __ -- m _ --- - �� .._.... - a 0.13 I i ; 0.1 W �._ ��...._.._ a- h r year__ .................... ._•__.__.-1_-- ....�..._...j-,.�.....__-.v--.. ..-------.__�__.._- _t.-..___.-_ �_. ..F-..-. n -------- r .11 0.1 ----------------- - --- .------------------------- - .-.-.- ---- -------------- ----- E , i Ru Hoff Area 3918'S f i 0.09 w f ..._._....__... __�._.._...__.____.__.�_............. _ u of f__.Vot M W_o�00. U.2a 0.08----------- ------ i ' 0,07 _ i Ru n off' de t�1-`o.26 ■ 0 = i U. 0.05 ; Fowl Lent 285 � 0.05� { T - - - ` {i � T 8� 3 m�n [ I s I I i i 0.04 Iti i 0 f CN�57.03 0.02. i i 0.01 } i E i i 0 5 B 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) z post development Tye Ill 24-hr 2 year Rainfall=3.20" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Subcatchlment Slb: (new Subcat) Runoff 0.68 cfs @ 12.04 hrs, Volume= 0.045 af, Depth= 2.60" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 year Rainfall=3.20" Area sf CN Description 81612 98 Paved parking & roofs 520 61 >75% Crass cover Good HSG B 91132 96 Weighted Average Tc Length Slope Velocity Capacity Description min) (feet) LftLft) ( cfs 1.6 10 0.0500 0.1 Sheet Flow, Grass: Dense n= 0.240 P2- 3.20" 0.8 92 0.0100 2.0 Shallow Concentrated Flow, Paved Kv=20.3 fps 0.1 45 8.0 Direct Ent , 2.5 147 Total Subcatchment S1 b: (new Subcat) Hydrograph ❑.75 { i 0.68 cfs Runoff 0.7- , 3 i � — ff } E i i 0.65. __..__..___ -......------------ . i ..._T. ___.._... I _-__.�........_.........__._�......._.__•...... _ _...� _.._._._._ _.._ ..�- ,..e_�1-11- 4 Z �i r-..2.... _ �.a.r�.. o.6 -._....------_.- ._._...._... _. __._..._ _ ' Fla n f l 0 " r...._...._ — —, a-_ a ------__.. � t � - _E sf0.5- 2 Ru nofif Area�9 3 -0.45 _... unof1(ol u me .-045 0.4 6-0 of � ! 1 Ruhoff f � f o 0.35`- 0.3 FloW1nLe t 147' 0.25 , .... ----- ................ --------------------........-..__._..__. s �I n 0.2 E i i ------ 0.1 _E i f � s t • � i i —...——..............�...s— --- —........_........... �_�—_ _ f i . . . . . . . . . . . . . . . . . . . . . 5 6 7 S 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type IIl 24-hr 2 year Rainfall=3.20" Prepared by Land Planning Inc. H droCAD@ 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Subcatchment S2w To culvert Runoff - 0.11 cfs a 12.09 hrs, Volume= 0.010 af, Depth= 0.42" Runoff by SCS TR-20 method, UH=SCS,Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 2 year Rainfall=3.20" Area sf CN Description 61225 55 Woods, Good, HSG B 11737 77 Woods, Good, HSG D 370 98 Paned parking & roofs 31301 61 >75% Grass cover, Good, HSG B 250 80 >75% Grass cover, Good, HSG D 11,883 62 Weighted Average Tc Length........... Slope Velocity Capacity Description (min) 2.4 36 0.2200 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 1.2 125 0.1300 1.8 Shallow Concentrated Flow, Woodland Kv= 5.0 f s 3.6 161 Total Subcatchment S2: To Culvert Hydrograph ..-- ' ----.. ---—- - _ -- 4 �... _..__� -------- -- - ---- ----- 0.12 7- --- -- _ - 0.115 0.11 cfsT --Runoff 0.11 ------ - ---t—-- _ _ _.... 0.1 1 fi # e ��__ 4� Iryear i [ i 0.095. s � s ; 0.09 -- - T_.____-- _- __.W.__.__ __...__....� �___ -__._____ _.W..� . . . .� -- 0.085 ' E � ' 0.08- RunoAreaml f 1 ,883sf -...____...--------------____- ._...._..�.... _ ____�...� �.__._._. _-_....__._ �_� 0.075 _ _ __ ..._ �- 0.07 R -Ui - _ w....u Do o nee o:o .1_a.. 40.065- E j 3 006 ._.............__.-..............._.-._�_i�_._._- -__ _�__..___ __.........._-_ ----- RunofDth° 2''-+-------.. 0.055 r2 € 0.05 - Le : 0.045 - - r...._------------------.- --- ------------- ._.._. _.............. �_------: ---------FJOM�- - ---- E.. 0.04 I 0.035 � � � � � � I 1 T316 min 0.03 -- ---- -- - - ..-.- - ..1.. i i i f .- 0.025 - - - -- -------------- �..._....... f----- - ___ _._..._.._.__ - N f 0.02- 1 f j -- --- _._.. ------ ------- - ----- ------------•-•-•-•- 1 ..........._ 0.015. F - { [ I 0 -a----�- --f-- ..--------------- _.... . j -.. 0.005 ` 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type Ill 24-hr 2 year Rainfall=3.20" Prepared by Land Planning Inc. H droCAD@ 7.00 sln 001661 @ 986-2003 Applied Microcomputer Systems 10/14/2010 Pond 'I Pw Infiltration Inflow Area = 0.210 ac, Inflow Depth 2.60" for 2 year event Inflow = 0.68 cfs a@ 12.04 hrs, Volume= 0.045 of Outflow 0.05 cfs r. 12.94 hrs, Volume 0.038 af, Atten= 92%, Lag- 54.2 min Discarded 0.04 cfs @ 11.00 hrs, Volume= 0.037 of Primary = 0.01 cfs a@ 12.94 hrs, Volume= 0.001 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 115.63' a@ 12.94 hrs Surf.Area=0 sf Storage 856 cf Plug-Flow detention time 155.8 min calculated for 0.038 of(84% of inflow) Center-of-Mass det. time= 109.1 min ( 854.9- 745.9 ) # Invert Avail.Stora e Storage Description 1 114.00' 1,870 cf Custom Stage Data Listed below Elevation Inc.Store Cum.Store __(feet (cubic-feet)0 0 114.50 151 151 115.00 317 468 115.50 309 777 116.00 298 11075 116.50 282 11357 117.00 246 11603 117.33 116 11719 117.83 151 11870 # Routing Invert outlet Devices 1 Discarded 0.00' 0.04 cfs Exfiltration at all elevations 2 Primary 115.58' 12.0" x 50.0' long Culvert CPP, square edge headwall, Ke= 0.500 Outlet Invert= 114.58' S= 0.0200 7' n= 0.010 Cc= 0.900 Discarded outFlow Max-0.04 cfs a@ 11.00 hrs HW=114.04' (Free Discharge) t--1=Exf ltration (Exfiltration controls 0.04 cfs) Primary OutFlow Max=0.01 cfs a@ 12.94 hrs HW=115.63' (Free Discharge) t--2 cuivert (Inlet controls 0.01 cfs @ 0.8 fps) p ) post development Type 1!124-hr Z year RaiMal1=3.24" Prepared by Land Planning Inc. H droCADO 7.00 sln 001581 @ 986-2003 Applied Microcomputer Systems 10/14/241 D Pond SIP: Infiltration Hydrograph 0.75 ------ :......._---.---- a ........ - --- �.............. ---- --.. - _......_......_-------- - -- ...__..------------ -- -.-•. _ --- - Inflow 0.68 cfs ' --- --------..._.-.... 0.7 ------------- -._ = _ ------ - - _..._... -- - °Outflow (� ' j Discarded 0.65"� i ';' ' E Inflow Area 0.21 o ac --'Primary i 0.6 --- - ^-- -- -- - 1 'Peek Ele ' 'l 5.63 0.55 E E E 0.5- t 0.45- E k E o 0.4 ___... -------------- .................. ... .....-...._ 0.35 E UL E 0.3 W :- _- _� _._------. .__.� 0.25~ i [ j I • € E � E __ - 0.2 0.15 E 0.1 •------- - _ - __ _. _----- ------ -- -- --- 0.05 cfs 0.04 cfs a....., 0.05 E 0.01 cfs E 0I , . , , I C'C'�. , , .� � I - , .. . 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type /// 24-hr year Rainfall=3.20" . Y Prepared by Land Planning Inc. H droCADO 7.00 sin 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Pond PI: Depression Inflow Area 1.108 ac, Inflow Depth = 0.22" for 2 year event Inflow 0.13 cfs a@ 12.31 hrs, Volume 0.021 of Outflow = 0.01 cfs @ 20.00 hrs, Volume= 0.003 af, Atten= 96%, Lag=461.2 min Discarded = 0.01 cfs a@ 20.00 hrs, Volume= 0.003 of Primary = 0.00 cfs a@ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span- 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev� 94.65' a@ 20.00 hrs Surf.Area- 822 sf Storage= 788 cf Plug-Flow detention time= 262.4 rain calculated for 0.003 of(13% of inflow) Center-of-Mass det. time= 123.6 min ( 996.3- 872.7 ) # Invert Avail.Stora a Storage Description 1 93.70' 9,191 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum-Store (feet) cubic-feet 93.70 20 0 0 94.00 188 31 31 96.00 23135 21323 21354 98.00 41702 61837 90191 # Routing Invert outlet Devices 1 Primary 97.60' 176.0 deg x 25.0' long Sharp-crested VeefTrap Weir C= 2.46 2 Discarded 0.00' 0.000375 fpm Exfiltration over entire Surface area Discarded outFlow Max=0.01 cfs a@ 20.00 hrs HW=94.65' (Free Discharge) 1t--2=Exf ltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.00 cfs a@ 5.00 hrs HW=93.70' (Free Discharge) 't—'l=Sharp-Crested VeefTrap Weir Controls 0.00 cfs past development Type 11124-hr 2 year Rainfall=3.20" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Pond Pl: Depression Hydrograph 3 0.14 � t 1 € Inflow l ' 0.13 cfs 0.13w l E Outflow E ---Discarded 0.12 ` Inflow Are: a-�'1 .10S ' c '-Primary 0.11 Peak .... E I ey 4.6E5 0.1 � . f....�..--...—..—...—�i.._.. .._..f �_�___•--. _._..__— ____.--- '-- —._ �.._---•_.�..._..._..—..— — — __ __ _ ............ -_ _.._._.ice►•-. 0.09- [ � 's 0.08 3 0.07 W.._....._.-----..... - a 0 O fi _..-_.._._----------- _- :._.� -- ------_ __ - _ ��_ — -- - :__ - _ ----- --- i r i 0.05 0.04 _ -- :- -- - -- - - -----------------------------_-------.--....---- _--------- ..-.-._.-.---. -------------------------° -.-----__- -- - • 0.0 3 ----- +--- w w --._.._...._- _- _._.. - - ---------- - ---- -- --- i -- --- W-- :- _.........__...........�0.02-_--- k- - �-----__ -- ------- -- -- ; - I �. { --- -------- -- - _- - - ------ _ ----------- -_--. _ ;- i 0.01 cfs 0.00 cfs ` �- , 0� ; 5 fi ? 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type ///24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCAD4 7.00 sln 001661 @ 1986-2003_Applied Microcomputer S stems 10/14/2010 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, U H=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment S1 a: To Depression Runoff Area=39,118 sf Runoff Depth=0.85" Flow Length=285' Tc=8.3 min CN=57 Runoff=0.73 cfs 0.063 of Subcatchment S1 b: (new Subcat) Runoff Area=9,132 sf Runoff Depth=3.98" Flow Length=147' Tc=2.5 min CN=96 Runoff=1.03 cfs 0.070 of Subcatchment S2: To Culvert Runoff Area=11,883 sf Runoff Depth=1.14" Flow Length=161' Tc=3.6 min CN=62 Runoff=0.39 cfs 0.026 of Pond 1 P: Infiltration Peak Elev=115.89' Storage=1,008 cf lnflow=1.03 cfs 0.070 of Discarded=0.04 cfs 0.041 of Primary=0.39 cfs 0.017 of Outflow=0.43 cfs 0.058 of Pond PI: Depression Peak Elev=96.23' Storage=3,125 cf Inflow=1.11 cfs 0.081 of Discarded=0.02 cfs 0.009 of Primary=0.00 cfs 0.000 of outflow=0.02 cfs 0.009 of Total Runoff Area= 1.380 ac Runoff Volume=0.159 of Average Runoff Depth = 1.38" post development Type !!! 24-hr 14 year Rainfall=4.70 Prepared by Land Planning Inc. H d roCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Sy stems 10/14/2010 Subcatchment S1a: To Depression Runoff - 0.73 cfs a 12.15 hrs, Volume- 0.063 af, Depth= 0.85" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt=0.05 hrs Type III 24-hr 10 year Rainfall=4.70" Area sf CN Description 28,123 55 Woods, Good, HSG B 469 98 Paved parking & roofs 10,526 61 >75% Grass cover, Good, HSG B 39,118 57 Weighted Average Tc Length Slope Velocity Capacity Description (min) 6.3 85 0.1100 0.2 Sheet Flow, Grass: Dense n= 0.240 P2� 3.20" 2.0 200 0.1100 1.7 Shallow Concentrated Flow, Woodland Kv= 5.0 les 8.3 285 Total Subcatchment S'l a: To Depression Hydrograph 0.8 ' 0.73 cfsj �.Runoff 0.75 ` 0.7: - -: _ _ .......... - - _I.. }. T � � 4 r '�o ear ------------ ......f_. ]I� ... .... '0 _.� _......._........ _- a-1 -fa0.fi �� n 1 7 0.55 -_ -Ru' �o f Area -3 .,�IW8-sf ----------- --------- 0.5 -—---------t----------------------- ----_--- u _ -- -ff- -1- -m 0,06-3�o f 0.45~0.4 5 0-w-8- rL 0.35 i i Flow Le gt =285' .n 3 -------�.------------------__----_�_-____._----------- . _ _..__.. I S { Tho= 0.2~ , k C N 57 0.1 t F 0.05 01 5 fi 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type Ill 24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sin 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Subcatchrnent S1 b: [new Subcat] Runoff - 1.03 cfs @ 12.04 hrs, Volume= 0.070 af, Depth= 3.98" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type III 24-hr 10 year Rainfall=4.70" Area sf CN Description 81612 98 Paved parking & roofs 520 61 >75% Grass cover, Good, HSG B 91132 96 Weighted Average Tc Length Slope Velocity capacity Description min) (feet (ft/ft) fUsec) (cfs 1.6 10 0.0500 0.1 Sheet Flow, Grass: Dense n= 0.240 P2� 3.20" 0.8 92 0.0100 2.o Shallow concentrated Flow, Paved Kv= 20.3 fps 0.1 45 8.0 Direct Entry, 2.5 147 Total Subcatchment S1 b: (new Subcat) Hydrograph } 1,03 cfs ' Runoff _ 1 e.................E... s iType: III 124m r 1 oyear } } r i Rainfall 411.0" Runoff A' rea�9032 of i i = ` u n off 'Vol mI ? } 4 oaf i 3 ` E Ru off D e th"*m98" E 'U- Flow, Le gth=1 i t I C :215 min . i ; } j CIV S i i i = i � 3 s 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type 11124-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Subcatchment S2: To Culvert Runoff - 0.39 cfs a 12.07 hrs, Volume= 0.026 af, Depths 1.14" Runoff by SCS TR-20 method, UH-SCS, Time Span= 5.00-20.00 hrs, dt� 0.05 hrs Type III 24-hr 10 year Rainfall=4.70" Area sf CN Descri Lion 61225 55 Woods, Good, HSG B 17737 77 Woods, Good, HSG D 370 98 Paved parking & roofs 31301 61 >75% Grass cover, Good, HSG B 250 80 >75% Grass cover, Good, HSG D 11,883 62 Weighted Average Tc Length Slope Velocity capacity Description (min) ftlft (fUsec (cfs) 2.4 36 0.2200 o.2 Sheet Flow, Grass: Dense n 0.240 P2=3.20" 1.2 125 0.1300 1.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.6 161 Total Subcatchment S2: To culvert Hydrograph • � E Runoff i ` - T..- ` ------- - - 0 4 --a--- �.. .._..- --------_— -.._.-..._. -.... cfs T;- --- !- i 0 39 ' E _-._........----------------__f --- - .--------- ---�_-- - _.._ ..---._..---.------ - 0.38 `E Type � � 4-hr 'Ioyear 0.36 0.34 _.._....... - ——— ——�— ----------; _.. :------------- 4.._.............— —— -- --— -- }.... — T. aa11-mm{_.__.._—.__-_______.{__--..___.......................... ___._.._ _r _-___---_...__.-.-...-....-._.......__.._..�_-_.___.__- _ _ _0.32 ---- ___-____-;__________________ _ - _n ; 0.3 I i � s E E Runoff Area' I1883 sf 0.28 " , 0.26 .............................. _...._._......_ _ u u) 0 24 -.- 1 __ `�. 0.22 � f � 3 RUn off Depth=, 1.114 0.2 V1 0.18- -- F"iI- ►0 16�---.----------- - 0.14-- E � TC=316 rai n --------------------- ---- --------............ 6 0.1 ......------------------- ------- 0.12-- s i-------------- -2 0.08 0.06 I 0.04 E 0.02= I - - .___ _ ---- -- -----s.._.. _ -——- ------------------- — —E I —E 0- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type !ll 24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 01986-2003 Applied Microcomputer Systems 10/14/2010 Pond 1 P: Infiltration Inflow Area = 0.210 ac, Inflow Depth = 3.98" for 10 year event Inflow = 1.03 cfs a@ 12.04 hrs, Volume= 0.070 of Outflow -= 0.43 cfs a@ 12.20 hrs, Volume= 0.058 af, Atten= 58%, Lag=9.5 min Discarded = 0.04 cfs @ 9.90 hrs, Volume- 0.041 of Primary = 0.39 cfs a@ 12.20 hrs, Volume= 0.017 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 115.89' a@ 12.20 hrs Surf.Area=0 sf Storage= 1,008 cf Plug-Flow detention time= 110.6 rain calculated for 0.058 of(84% of inflow) Center-of-Mass det. time= 63.3 min ( 803.1 -739.7 ) # Invert Avail.Stora e Stora a Descri #ion 1 114.00' 1,870 cf Custom Stage Data Listed below Elevation Inc.Store Cum.Store feet cubic-feet cubic-feet 114.00 0 0 114.50 151 151 115.00 317 468 115.50 309 777 116.00 298 11075 116.50 282 17357 117.00 246 11603 117.33 116 11719 117.83 151 11870 # Routing Invert outlet Devices 1 Discarded 0.00' 0.04 cfs Exfiltration at all elevations 2 Primary 115.58' 12.0" x 50.0' long Culvert CPP, square edge headwall, Ike= 0.500 Outlet Invert= 114.58' S= 0.0200'1' n= 0.010 Cc= 0.900 Discarded OutFlow Max=0.04 cfs a@ 9.90 hrs HW=114.04' (Free Discharge) '--`l=Exfi ltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=0.39 cfs a@ 12.20 hrs HW=115.89' (Free Discharge) "�--2=culvert (Inlet Controls 0.39 cfs a fps) � 1.9 p ) post development Type !II 24-hr 10 year Rainfafi=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001051 @ 1986-2003 Applied Microcomputer 5 stems 10/14/2010 Pond 1 P: Infiltration Hydrograph ' 1.03 cfs ; --Inflow Outflow ....................................................y.................................,..................y...........-..__.._._..-------.....,................:.......................,_ _.... _.............. ..................... .....---.....................,_.,._..._.........-...._................. ................... •ww --�-- Discarded Inflow Area=0.21 D C Primar y Peak Elewml 1.5.8:9' E � € rag' a '1 1 D08 cf Sto U. cfs E i E 4.39 cfs E f ; } l i i j i 1 9.94 cfs 3 U- 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 5 1 4 post development Type H/24-hr 10 year Rainfall=4.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Ap2lied Microcomputer Systems 10/14/2010 Pond P'l: Depression Inflow Area = 1.108 ac, Inflow Depth = 0.87" for 10 year event Inflow = 1.11 cfs @ 12.16 hrs, Volume= 0.081 of Outflow = 0.02 cfs @ 20.00 hrs, Volume- 0.009 af, Atten= 99%, Lag=470.1 min Discarded = 0.02 cfs @ 20.00 hrs, Volume= 0.009 of Primary - 0.00 cfs @ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 96.23' @ 20.00 hrs Surf.Area= 2,424 sf Storage= 3,125 cf Plug-Flow detention time= 256.4 min calculated for 0.009 of(11% of inflow) Center-of-Mass del. time= 157.5 min ( 980.6- 823.0 ) # Invert Avail.Story a Story a Description 1 93,70' 9,191 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum-Store feet s -ft) (cubic-feet) (20 0 0 94.00 188 31 31 96.00 21135 21323 21354 98.00 4,702 61837 91191 # Routing- Invert Outlet Devices 1 Primary 97.60' 176.0 deg x 25.0' long Sharp-Crested Vee/Trap We!r C= 2.46 2 Discarded 0.00' 0.000375 fpm Exfltration over entire Surface area Discarded outFlow Max=0.02 cfs @ 20.00 hrs HW=96.23' (Free Discharge) t2=Exfiltration (Exfiltration Controls 0.02 cfs) Primary outFlow Max=0.00 cfs @ 5.00 hrs HW=93.70' (Free Discharge) t--1=Sharp-crested Vee/Trap weir Controls 0.00 cfs post development 11! 24-hr 10 year �4alr�fa11=4.7Dr' Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer S stems 10/14/201 0 Pond Pl: Depression Hydrograph E . cfs inflow Outflow € -Discarded w re ...0,0 '"'"" Primary ........ ............... ............................................. .... �k Peek Elev 96.23 k f j k Storage =3 1 26 cf j i t i N j k v I f E t i i k � I i 3 � t i i E _ LO .02 cfs 0.00 cfs 1 p 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type 11124-hr 100 year Rainfall=6.70" Prepared by Land Planning Inc, H droCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Time span=5.00-20.00 h rs, dt=0.05 h rs, 301 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment S1 a: To Depression Runoff Area=39,118 sf Runoff Depth=1.93" Flow Length=285' Tc=8.3 min CN=57 Runoff=1.89 cfs 0.144 of Subcatchment S'lb: (new Subcat) Runoff'Area=9,132 sf Runoff Depth=5.82" Flow Length-=147' Tc=2.5 min CN=96 Runoff=1.48 cfs 0.102 of Subcatchment S2: To Culvert Runoff Area=11,883 sf Runoff Dep th=2.38" Flow Length=161' Tc=3.6 min CN=62 Runoff=0.86 cfs 0.054 of Pond 1 P: Infiltration Peak Elev=116.15' Storage=1,161 cf Inflow=1.48 cfs 0.102 of Discarded=0.04 cfs 0.044 of Primary-=1.20 cfs 0.043 of outflow=1.24 cfs 0.087 of Pond PI: Depression Peak Elev=97.50' Storage=7,482 cf Inflow=3.04 cfs 0.187 of Discarded=0.03 cfs 0.015 of Primary=0.00 cfs 0.000 of outflow=0.03 cfs 0.015 of Total Runoff Area= 1.380 ac Runoff Volume =0.300 of Average Runoff Depth =2.61" post development hype 1l124-hr 140 year Rainrfa!!=G.74►' Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Suhcatchment S1 a: To Depression Runoff 1.89 cfs a@ 12.13 hrs, Volume= 0.144 af, Depth= 1.93" Runoff by SCS TR-20 method, UH�SCS, Time Span=5.00-20.00 hrs, dt� 0.05 hrs Type III 24-hr 100 year Rainfall=6.70" Area-(s!l CN Descri Lion 28,123 55 Woods, Good, HSG B 469 98 Paved parking & roofs 10,526 61 >75% Grass cover Good, HSG B 39,118 57 Weighted Average Tc Length Slope Velocity Capacity Description (min) cfs 6.3 85 0.1100 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 2.0 200 0.1100 1.7 Shallow Concentrated Flow, Woodland Kv 5.0 fps 8.3 285 Total Suhcatchment Sla: To Depression Hydragraph .................... _............ 1 cfs --Runoff i.... i z RQ y— i I i AIT y pe 24-h 100' year i E i ain�fasl 61, i Runoff A eamw, 39,1 18 sf u r off Vol m e o. 144=of Run" offDe. thsim U. o I E Flov Le , goth 285' i � i i E i TcMINIM S3 r� n i CN�67 gg 5 tt[ } I f` E i i j 3 I i Oloo, P I 1 9 , looloo" 1 1: F got I I I loo"T" . 5 6 7 S 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type iii 24-hr 766 year Rainfaii=6.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 986-2003 Applied Microcomputer Systems 10/14/2010 Subcatchment S1 b: (new Su bcat) Runoff _ 1.48 cfs @ 12.04 hrs, Volume= 0.102 af, Depth= 5.82" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type Ill 24-hr 100 year Rainfall=6.70" Area (sf)___ CN Description 81612 98 Paved parking & roofs 520 61 >75% Grass cover, Good, HSG B 91132 96 Weighted Average Tc Length Slope Velocity Capacity Description (min) (ft/ft) 1.6 10 0.0500 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 3.20" 0.8 92 0.0100 2.0 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 45 8.0 Direct Entry, 2.5 147 Total Subcatchment S1b: (new Subcat) Hydrograph i f { 1.48 cfs ; Runoff j f yearT' e� 124ah ' � '� { Raiqtall : 6.70 r s i i i i [ I i 3 i � i . ........... ............. ............... Runo --_.1............. ............ E i u doff �1 01 M 0 of Run' of02 De th '-5.82' { : E Flow Le gth 47' { r � � i Tc=2'5n'1Nn f i 1 g i I i I i E C N�96 I ' .......... j i 1 � j E o . 5 6 7 $ 9 10 11 12 13 14 15 16 17 18 w 4 19 3 26 Time (hours) past development Tyke 111 Z4-hr 1 U0 year Rainfall=6.70►' Prepared by Land Planning Inc. H droCAD@ 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Subcatchment S2: To Culvert Runoff -- 0.86 cfs a 12.06 hrs, Volume- 0.054 af, Depth= 2.38" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt�0.05 hrs Type III 24-hr 100 year Rainfall=6.70" Area sf CN Description 61225 55 Woods, Good, HSG B 11737 77 Woods, Good, HSG D 370 98 Paved parking & roofs 31301 61 >75% Grass cover, Good, HSG B 250 80 >75% Grass cover, Good, HSG D 11,883 62 Weighted Average Tc Length Slope Velocity Capacity Description (min) feet) (ft/ft) ( 2.4 36 0.2200 0.2 Sheet Flow, Grass: Dense n= 0.240 1?2� 3.20" 1.2 125 0.1300 1.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.6 161 Total Subcatchment S2: To Culvert Hydrograph 0.95- k € f_ -- ------- FRuno 0.9' __..._..._....�__ 0.86 cfs - -----__..___T 0.85, .......---------------------- ------- - 0.87 Type 1112 year 0.75 E al nfal 6.70' 0.7 � t 0.65 -- -- _RO °S f n a o e i i 0.6 } Ru-n"-off--+- 0.55 __ - ---- ------ _......._ ------- - ............. f05 Runof De.' th- _ 0 0.45~ - -- � .................................._.. --- -_.._..._..� _ ____-- -� 0.4- f ' -'low Length�l 61' 0.35 _........._. - -_ _.__._..._..W- 36----- 0.3r n 0 25 -.-------- --..._....._..----------- - ----------- -- --- - _........... r�..... -. ------------------- --- rr}} E 's l� 0.G` — — -- -- — ---.-.-...-...-- _�...--- —---�— — --•---•---•---•—•— -------------------- i ; ______.._-_................... ...... _.__f......._........ ;-T_-...____._.___.____C. I �- f 4 I I 0.15 i w---......._- ........... -- ------------ - _-- +-------------------------------.. ......w......- - 6 3 a. -_ - - --- - -- - -- ... ! i_.-......-.._ -- -------------------------- 0 05 --- - -— -....................;--------------------- ---- - --- --------; ---- E € - 0M 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type 11124-hr 100 year Rainfa&6.70" Prepared by Land Planning Inc. H droCAD@ 7.00 sln 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Pond I P: Infiltration Inflow Area = 0.210 ac, Inflow Depth = 5.82" for 100 year event Inflow - 1.48 cfs a@ 12.04 hrs, Volume= 0.102 of Outflow = 1.24 cfs @ 12.09 hrs, Volume= 0.087 af, Atten= 16%, Lag=2.9 rain Discarded = 0.04 cfs a@ 8.70 hrs, Volume= 0.044 of Primary - 1.20 cfs a@ 12.09 hrs, Volume= 0.043 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 116.15' a@ 12.09 hrs Surf.Area=0 sf Storage= 1,161 cf Plug-Flow detention time= 82.7 min calculated for 0.087 of(86% of inflow) Center-of--Mass det. time= 38.9 min ( 774.6 -735.7 ) # I nve rt Avai 1.Stora a Storage Description 1 114.00' 1,870 cf Custom stage Data Listed below Elevation Inc.Store Cum.Store (feet) cubic-feet) (cubic�feet 114.00 0 0 114.50 151 151 115.00 317 468 115.50 309 777 116.00 298 11075 116.50 282 11357 117.00 246 11603 117.33 116 11719 117.83 151 11870 # Routing Invert outlet Devices 1 Discarded 0.00' 0.04 cfs Exfiltration at all elevations 2 Primary 115.58' 12.0" x 50.0' long Culvert CPP, square edge headwall, Ke= 0.500 Outlet Invert= 114.58' S= 0.0200 '1' n= 0.010 Cc= 0.900 Discarded outFlow Max=0.04 cfs a@ 8.70 hrs HW=114.04' (Free Discharge) t-l1 Exfiltration (Exfiltration Controls 0.04 cfs) Primary OutFlow Max=1.17 cfs a@ 12.09 hrs HW=116.14' (Free Discharge) 't-2=culvert (Inlet Controls 1.17 cfs fps)@ 2.6 p ) post development Type 11124-hr 100 year Rainfall=6.7'0" Prepared by Land Planning Inc. H droCADO 7.00 sin 001661 @ 1986-2003 Applied Microcomputer Systems 10/14/2010 Pond 'I P: Infiltration Hydrograph E i --inflow 1.48 cfsOufflow i i -�-Discarded I Inflow Area Ow21O C '""'Primary l4 01 A^4^ i I 1.20 cfs E Peak EleIMM 11.6.1 ragi ................ f .. ........... E ..................................................................-Sto, D:::;l N I i i 1 I € EEE � E E i E o E j I I 1 1 i I i o i i I s E I i 0.04 cfs E V ' 5 6 ................ 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) post development Type ///24-hr 166 year Rainfa11=6.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 986-2003 Applied Microcomputer Systems 10/14/2010 Pond PI: Depression Inflow Area = 1.108 ac, Inflow Depth = 2.03" for 100 year event Inflow - 3.04 cfs a@ 12.11 hrs, Volume= 0.187 of Outflow = 0.03 cfs a@ 20.00 hrs, Volume= 0.015 af, Atten= 99%, Lag=473.3 min Discarded = 0.03 cfs a@ 20.00 hrs, Volume- 0.015 of Primary = 0.00 cfs a@ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev=97.50' a@ 20.00 hrs Surl:.Area=4,060 sf Storage= 7,482 cf Plug-Flow detention time= 265.8 min calculated for 0.015 of(8% of inflow) Center-of-Mass det. time= 168.8 min ( 974.7 - 806.0 ) # I nvert Avail.Story e Storage Description 1 93.70' 9,191 cf custom stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) cubic-feet cubic-feet 93.70 20 0 0 94.00 188 31 31 96.00 21135 21323 21354 98.00 41702 61837 %191 # Routing Invert outlet Devices 1 Primary 97.60' 176.0 deg x 25.0' long Sharp-Crested VeelTrap Weir C= 2.46 2 Discarded 0.00' 0.000375 fpm Exfiltration over entire Surface area Discarded OutFlow Max=0.03 cfs a@ 20.00 hrs HW=97.50' (Free Discharge) t-2=Exfltration (Exfiltration controls 0.03 cfs) Primary OutFlow Max=0.00 cfs a@ 5.00 hrs HW=93.70' (Free Discharge) t-1=Sharp-crested Vee/Trap Weir Controls 0.00 cfs post development Type 11124-hr 100 year Rainfall=6.70" Prepared by Land Planning Inc. H droCADO 7.00 sln 001661 @ 986-2003 Applied Microcom uter Sy stems 10/14/241 o Pond PI: Depression Hydrograph k --Inflow E 3.04 cfs E ., Ik ............._.._............ ...._............--........ ....... ........................-- ........ Outflow 3,. .- E - .... -_ Discarded nflo' w rea i .1U8 ac --Primary 's Peak E I ev 97.50 l i ; ra. e 7 4S� �S t b............. y-._.._..-..................................................................--. ................................................................ 1612 E w i f i i 3 D I E i k E k ' k i � E 1 E k E 0.00 cfs i 0.03 cfs all 0 , 5 fi 7 S 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) f r Soil Report USDA United States A product of the National Custom So"11 Resource Department of Cooperative S il Survey, Agriculture a joint effort of the United Rep,o rt for States Department of N C S Agriculture and other Essex County, Federal agencies, State Natural agenc,ies including the Resources, Agricultural Experiment Massachusetts, Conservation Stations, and local Service participants Northern Part fd .......... Preface .............. ................. Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand,protect,or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses.The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning,onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http:llsoils,usda.govlsgil) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center(http://offices.sc.egov,usda.gov/locator/app? agency=arcs) or your NRCS State Soil Scientist(http://soils-usda.gov/contact/ state offices/). Great differences in soil properties can occur within short distances, Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Soil Data Mart Web site or the NRCS Web Soil Sury g ey. The Soil Data Mart is the data storage site for the official soil survey information. The U.S. Department of Agriculture(USDA)prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal,or because all or a part of an individuals income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means 2 for communication of program information (Braille, large print, audiotape, etc.)should contact USDA's TARGET Center at(202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20280-9410 or call (800) 795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents ...................... .......................... .... ................. ............. .................................. Preface........................■..................................................■........................................2 SoilMap..................................................................................................................5 SoilMap................................................................................................................5 Legend..................................................................................................................7 MapUnit Legend..................................................................................................8 MapUnit Descriptions..........................................................................................8 Essex County, Massachusetts, Northern Part................................................10 1 -Water.....................................................................................................10 38A Pipestone loamy sand, 0 to 3 percent slopes....................................10 51 A Swansea muck, 0 to 1 percent slopes...............................................11 52A l;reetown muck, 0 to 1 percent slopes..............................................12 253B Hinckley loamy sand, 3 to 8 percent slopes....................................13 253C Hinckley loamy sand, 8 to 15 percent slopes..................................14 260A Sudbury fine sandy loam, 0 to 3 percent slopes.............................15 421 B—Canton fine sandy loam, 3 to 8 percent slopes, very stony.............16 710E-�Canton and Charlton fine sandy loams, steep, extremely stony.....17 711 C- Charlton-Rack outcrop-Hollis complex, 8 to 15 percent slopes......19 711 D Charlton-Rock outcrop-Hollis complex, 15 to 25 percent slopes....21 Soli Information for All Uses...............................................................................24 Soil Properties and Qualities..............................................................................24 Soil Qualities and Features.............................................................................24 HydrologicSoil Group.................................................................................24 References............................................................................................................29 4 Sol■ l Map ............ ..........= ............ ............. The soil map section includes the soil reap for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 5 ...................... Custom Soil Resource Report Soil Map �- N a 0 329400 329470 329540 329610 329680 329750 329820 329890 329960 330030 4210 38,151, 2 38 15' S •�� € II III �I C 1 Ci it j� 3 F' ...:.:::.:. I'> v i' 4: f 11 v <.3 3 L �yy s N 04 , S C.... _ I �.: � � �� � �„ I , .,,� \€�€ �,,,,_• i.z x€�. L \••. ;z s11',>, Q I Y il,„I ICI!I II 'I �, c: :'.:z'. :< ;,.s� c•: C3 Y �.•Z�Z, �S}:si'.:`• �]?Sz','„>, e•).1 ,ol?: I 'I�yl'� L a. S t 04\ 3. 11 S•s l yy �- '' 111 t 3: tt7 t I I y. II I I II'+I ,.1 I i pl I, s: I >e C•' I i s, 9' 3 s L? F£ ............... q' .... ........,..,., I I III.. ,. ....,..... ......z,.. as,. ...,,..::.._. .�,, e Z;. I y t ......::.:..: I > , .....,.. .. ........ .........,., 1, I ................ .......2,•..... �::::::.:::,::::... :z1:� CV ...............::.:::..:. ......... i R, ...... ..... ..........:...,-,.::::....,.. ':} ::,". Z '.III, II I�lil. II;S: 1 I I .,.......... ............- S ... i •� . ? �{ } z- .=1i1 ��''I I ;;i' "::3 }bill ,Y Ili II I I; ,S � I' `i I , I rF \ =1 is Il I u Z 3:. _ L i .•.{:.:. mil._ �'j'] \z gl 4J€ ,.3.: , N l - IT a 1,{ Y.�3. € `Zic,C N 1 3 lr N '.3. i. I , Y,S l 33 £�C c f �,1 +I yj )1 fII I �Y 1� 111 - .f xc=, =3 �}r �y( i 31,< � III 4 i lY1 N .11 N =i Y Ijll' l \T I L a, 1� A I .e h( 3 ti �F ;2%36 1" SJ 329400 329470 329540 329610 329680 329750 329820 329890 329960 330030 iv Ubp Scale:1:3,090 it primed on A size(8.5"x 11")sheet. cv Meters 0 40 80 160 240 Feet 0 150 300 600 900 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest 1A0Very Stony Spot Map Scale: :3, 90 if printed can A size( .5"x 1 l`)sheet. Area of Interest(AO! it Wet Sp©t The sail surveys that comprise your A01 were mapped at :15,840.. Soils _ Offer Soil Map Unite Special nrep Please rely on the bar scale on each map sheet for accurate map Special Point Features measurements. ents. Gully Blowout Short Steep Slope Source of aNatural Resources Conservation Service Borrow Pit Web Soil Surrey U L. http://websoilsurvey.nrcs.usda.gov Other X Clay Spot Coordinate System. UTM Zone 19N NAD83 Political Features Closed Depression Cities This product is generated from the USDA- RCS certified data as of Gravel Pik Water Features the version date(s)listed below. Gravelly Spot Oceans Soil Survey Area: Essex County,Massachusetts,Northern Part Landfill ., Streams and Canals Survey Area Data: Version 8,Aug 11,200 Lava Flow Transportation Date(s)aerial images were photographed: 711012003 4-1 47 Rails Marsh or swamp Interstate Highwayse o boto or other base ma on which e soil lines were Mine�r Q�arr p p -�,, US Routes compiled and digitized probably`differs from e background Miscellaneous War imagery displayed on Wiese raps.As result,some minor shifting Major Roads Perennial dater ofreap unit boundaries may be evident. Roc Outcrop ,.. LQ I Reads Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Custom Soil Resource Report pia Unit Legend C t assachusetts Northern Part. A 60 . . .......... .... . .. ..................::...:. ............. ... Essex vun . .....,.... .... ..... .. .... i tUlap Una symbol M.. Unit Name Acres in Ao! Percent Qf A01 1 Water 0.3 0.6% 38A Pipestone loamy sand,0 to 3 percent slopes 3.0 7.5% 51A Swansea muck,0 to 1 percent slopes 1.8 4.6% 52A Freetown muck,0 to 1 percent slopes 7.9 20.1% 253B Hinckley loamy sand,3 to 8 percent slopes 0.3 0.8% 253C Hinckley loamy sand,8 to 15 percent slopes 0.2 0.5% 260A Sudbury fine sandy loam,0 to 3 percent 8.7 22.2% slopes 421 B Canton fine sandy loam,3 to 8 percent 2.5 6.4% slopes,very stony 710E Canton and Charlton fine sandy Ioams, 3.5 9.0°/0 steep,extremely stony 711 C Charlton-Rock outcrop-Hollis complex,8 to 5.1 13.0% 15 percent slopes 711 D Chariton-Rock outcrop-Hollis complex,15 to 6.0 15.3% 25 percent slopes Totals for Area of Interest 39.4 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils.On the landscape, however,the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. 5 Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management, These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description, other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management.These are called contrasting,or dissimilar,components.They generally 8 Custom Soil Resource Report are in small areas and could not be mapped separately because of the scale used, Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps, If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use, On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 9 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps.The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, o to 5 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha- Beta association, o to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, o to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 9 Custom Soil Resource Report Essex County, Massachusetts, Northern part '1—Water Map Unit Setting Frost free period: 125 to 165 days Map Unit Composition Water: 100 percent 38A—Pip estone loamy sand, 0 to 3 percent slopes Map Unit Setting Elevation: 600 to 1,000 feet Mean annual precipitation:45 to 54 inches Mean annual air temperature:43 to 54 degrees F Frost free period: 145 to 240 days Map Unit Composition Pipestone and similar soils: 80 percent Minor components: 20 percent Description of Pipestone Setting Landform: Terraces Landform position (two-dimensional):Toeslope Landform position (three-dimensions!): Tread Down-slope shape: Concave Across-slope shape: Concave Parent material: Loose sandy glaciofluvial deposits Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Capacity of the most limiting layer to transmit water(Ksat)., High to very high (6.00 to 20.00 inlhr) Depth to water table:About 18 to 41 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Low about 4.2 inches) Interpretive groups Land capability(nonirrigated): 4w Typical profile g to 3 inches: Muck 3 to 7 I inches: Loamy sand I I to 24 inches: Loamy sand 24 to 60 inches: Stratified sand to fine sand 10 Custom Soil Resource Report Minor Components Wareham Percent of map unit. 10 percent Landform:Terraces Scarboro Percent of map unit: 7 percent Landform:Terraces Deerfield Percent of map unit: 3 percent 51A--Swansea muck, o to 1 percent slopes Map Unit Setting Mean annual precipitation: 45 to 54 inches Mean annual air temperature;43 to 54 degrees F Frost-free period., 145 to 240 days Map Unit Composition Medisaprists, shallow and similar soils: 80 percent Minor components: 20 percent Description of Medisaprists, Shallow Setting Landform: Bogs, drainageways Landform position (two-dimensional): Toeslope Landform position (three-dimensional): Dip Down--slope shape: Concave Across-slope shape: Concave Parent material: Highly-decomposed herbaceous organic material over loose loamy glaciofluvial deposits and/or firm sandy basal till Properties and qualities Slope: 0 to I percent Depth to restrictive feature: More than 80 inches Drainage class:Very poorly drained Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.60 to 6.00 in/hr) Depth to water table:About 0 to 12 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: High (about 9.0 inches) Interpretive groups Land capability(nonirrigated): 5w Typical profile 0 to 9 inches: Muck Custom Soli Resource Report g to 25 inches: Muck 26 to 60 inches: Muck Minor Components Freetown Percent of map unit: 10 percent Landform: Bogs Whitman Percent of map unit: 5 percent Landform: Depressions Scarboro Percent of map unit: 3 percent Landform:Terraces Birdsall Percent of map unit: 2 percent Landform: Depressions 52A—Freetown muck, o to I percent slopes Map Unit Setting Mean annual precipitation:45 to 54 Inches Mean annual air temperature:43 to 54 degrees F Frost�free period: 145 to 240 days Map Unit Composition Medisaprists, deep and similar soils: 80 percent Minor components: 20 percent Description of Medisaprists, Deep Setting Landform: Bogs, drainageways Landform position (two-dimensional):Toeslope Landform position (threedimensronal): Dip Down-slope shape: Concave Across-slope shape: Concave Parent material: Highly-decomposed herbaceous organic material Properties and qualities Slope: 0 to I percent Depth to restrictive feature: More than 80 inches Drainage class:Very poorly drained Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.60 to 6.00 inlhr) Depth to water table:About 0 to 12 inches Frequency of flooding: None Frequency of ponding: None Available water capacity:Very high about 22.2 Inches) 12 Custom Soil Resource Report Interpretive groups Land capability(nonirrigated): 5w Typical profile 0 to 5 inches: Muck 5 to 60 inches: Muck Minor Components Swansea Percent of map unit: 10 percent Landform: Bogs Whitman Percent of map unit: 5 percent Landform: Depressions Scarboro Percent of map unit: 3 percent Landform:Terraces Birdsall Percent of map unit; 2 percent Landform: Depressions 253BHinckley loamy sand, 3 to 8 percent slopes Map Unit Setting Elevation: 0 to 1,Ogg feet Mean annual precipitation:45 to 54 inches Mean annual air temperature:43 to 54 degrees F Frost-free period: 145 to 240 days Map Unit Composition Hinckley and similar soils: 80 percent Minor components: 20 percent Description of Hinckley Setting Landform: Deltas on terraces, outwash plains on terraces Landform position (two-dimensional): Shoulder, footslope Landform position (three-dimensional): Tread Down-slope shape: Convex Across-slope shape: Convex Parent material: Loose sandy and gravelly glaciofluvial deposits Properties and qualities Slope: 3 to 8 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained 13 Custom Soil Resource Report Capacity of the most limiting layer to transmit water(Ksat).* High to very high (6.00 to 20.00 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency ofponding: None Available water capacity; Low about 3. inches) Interpretive groups Land capability(nonirrigated): 3s Typical profile 0 to inches; Muck I to 8 inches: Loamy sand 8 to 20 inches:Very gravelly loamy sand 20 to 60 inches: Stratified cobbly coarse sand to very gravelly loamy fine sand Minor Components Windsor Percent of map unit: 12 percent Sudbury Percent of map unit: 3 percent Carver Percent of map unit: 2 percent Wareham Percent of map unit. 2 percent Landform:Terraces Swansea Percent of map unit: 1 percent Landform: Bogs 25C--- Hinckley loamy sand, 8 to 16 percent slopes Map Unit Setting Elevation: o to 1,000 feet Mean annual precipitation:45 to 54 inches Wean annual air temperature:43 to 54 degrees F Frost free period: 145 to 240 days Map Unit Composition Hinckley and similar soils: 80 percent Minor components; 20 percent Description of Hinckley f Setting Landform: Drainageways, kames, terraces Landform position (two-dimensional): Backslope Landform position (three-dimensional); Side slope, riser 14 Custom Soil Resource Report Down-slope shape: Linear Across-slope shape: Convex Parent material: Loose sandy and gravelly glaciofluvial deposits Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Capacity of the most limiting layer to transmit water(Ksat): High to very high (6.00 to 20.00 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Low(about 3.1 inches) Interpretive groups Land capability(nonirrigated): 4s Typical profile 0 to I inches: Muck I to 8 inches: Loamy sand 8 to 20 inches:Very gravelly loamy sand 20 to 50 inches: Stratified cobbly coarse sand to very gravelly loamy fine sand Minor Components Windsor Percent of map unit. 15 percent Carver Percent of map unit: 2 percent Sudbury Percent of map unit: 1 percent Swansea Percent of map unit: I percent Landform: Bogs Wareham Percent of map unit: I percent Landform: Terraces 260A —Sudbury fine sandy loam, o to 3 percent slopes Map Unit Setting Elevation: 0 to 2,100 feet Mean annual precipitation:45 to 54 inches !Mean annual air temperature:43 to 54 degrees F Frost-free period. 145 to 240 days Map unit Composition Sudbury and similar soils: 80 percent 5 Custom Soil Resource Report Minor components: 20 percent Description of Sudbury Setting Landform: Flats Landform position (two-dimensional): Footslope Landform position (three-dimensional): Rise Down-slope shape: Concave Across-slope shape: Concave Parent material: Friable loamy eolian deposits over loose sandy glaciofluvial deposits derived from granite and gneiss Properties and qualities Slope: 0 to a percent Depth to restrictive feature: More than 80 inches Drainage class: Moderately well drained Capacity of the most limiting layer to transmit water(Ksat): High (2.00 to 6,00 in/hr) Depth to water table:About 18 to 36 inches Frequency of flooding: None Frequency of ponding: None Available water capacity., Low (about 4.7 inches) Interpretive groups Land capability(nonim'gated): 2w Typical profile 0 to I inches: Muck 1 to 5 inches: Fine sandy loam 5 to 21 inches: Sandy loam 21 to 27 inches: Loamy sand 27 to 60 inches: Error Minor Components Merrimac Percent of map unit: 15 percent Walpole Percent of map unit: 5 percent Landform:Terraces 421E Canton fine sandy loan, 3 to 8 percent slopes, very stony Map Unit Setting Elevation: 0 to 1,000 feet Mean annual precipitation:45 to 54 inches Mean annual air temperature:43 to 54 degrees F Frost-free period: 145 to Zoo days Map Unit Composition Canton and similar soils: 80 percent 16 Custom Soil Resource Report Minor components: 20 percent Description of Canton Setting Landform: dills Landform positron (two-dimensional): Footslope Landform position (three-dimensional): Base slope Down-slope shape: Convex Across-slope shape: Convex Parent material: Friable coarse-loamy eolian deposits over friable sandy and gravelly basal till derived from granite and gneiss Properties and qualities Slope: 3 to 8 percent Surface area covered with cobbles, stones or boulders: 1.6 percent Depth to restrictive feature: 18 to 36 inches to strongly contrasting textural stratification Drainage class: Well drained Capacity of the most limiting layer to transmit water(Ksat): Nigh (2.00 to 6.00 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available wafer capacity: Low(about 4.5 inches) Interpretive groups Land capability(nonirrigated): 5s Typical profile 0 to 6 inches: Fine sandy loam 6 to 33 inches: Fine sandy loam 33 to 60 inches: Gravelly loamy sand Minor Components Scituate Percent of reap unit: 15 percent Swansea Percent of map unit: 5 percent Landform: Bogs 710E—Canton and Charlton fine sandy loans, steep, extremely stony Map Unit Setting Elevation: 0 to I,000 feet Mean annual precipitation:45 to 54 inches Mean annual air temperature:43 to 54 degrees F Frost-free period: 145 to 240 days Map Unit Composition Canton and similar soils: 60 percent 17 Custom Soil Resource Report Charlton and similar soils: 20 percent Minor components: 20 percent Description of Canton Setting Landform: Hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Friable coarse-loamy eolian deposits over friable sandy and gravelly basal till derived from granite and gneiss Properties and qualities Slope:25 to 35 percent Surface area covered with cabbies, stones or boulders: 9.0 percent Depth to restrictive feature: 18 to 36 inches to strongly contrasting textural stratification Drainage class:Well drained Capacity of the most limiting layer to transmit water(Ksat): High (2.00 to 6.00 inthr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency ofponding: None Available water capacity: Low about 4.4 inches) Interpretive groups Land capability(nonirrigated): 7s Typical profile 0 to 3 inches: Fine sandy loam 3 to 33 inches: Fine sandy loam 33 to 60 inches: Gravelly loamy sand Description of Charlton Setting Landform: Hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material. Friable coarse-loamy eolian deposits over friable coarse-loamy basal till derived from granite and gneiss Properties and qualities Slope: 25 to 35 percent Surface area covered with cobbles, stones or boulders: 9.0 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.60 to 6.00 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Moderate (about 7.5 inches) 18 Custom Soil Resource Report Interpretive groups Land capability(nonirrigated): 7s Typical profile g to 4 inches: Fine sandy loam 4 to 28 inches: Gravelly fine sandy loam 28 to So inches: Gravelly fine sandy loam Minor Components Paxton Percent of wrap unit: 10 percent Hollis Percent of map unit; 7 percent Woodbridge Percent of map unit: 3 percent 711C -Charlton-Rock outcrop-Hollis complex, 8 to IS percent slopes Map Unit setting Mean annual precipitation:45 to 54 inches 1111'ean annual air temperature:43 to 54 degrees F Frost-free period: 125 to 240 days Map Unit Composition Charlton and similar soils: 60 percent Rock outcrop: 16 percent Hollis and similar soils: 15 percent Minor components: 9 percent Description of Charlton Setting Landform: Ridges, hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Friable coarse-loamy eolian deposits over friable coarse-loamy basal till derived from granite and gneiss Properties and qualities Slope: 8 to 15 percent Surface area covered with cobbles, stones or boulders: 1.6 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.60 to 6.00 inlhr) 19 Custom Soil Resource Report Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Moderate (about 7.5 inches) Interpretive groups Land capability(nonirrigated): 6s Typical profile o to 4 inches: Fine sandy loam 4 to 28 inches: Gravelly fine sandy loam 28 to 60 inches: Gravelly fine sandy loam Description of Rock outcrop Setting Parent material: Granite and gneiss Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: 0 inches to lithic bedrock Interpretive groups Land capability(nonirrigated): 8s Description of Hollis Setting Landform: Ridges, hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material, Shallow,friable loamy basal till derived from granite and gneiss over granite and gneiss Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: 10 to 60 inches to lithic bedrock Drainage class: Somewhat excessively drained Capacity of the most limiting layer to transmit water(Ksa t):Very low(0.00 to 0.00 inl hr) Depth to water table: More.than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity:Very low (about 2.1 inches) Interpretive groups Land capability(nonirrigated): 4e Typical profile o to I inches: Muck 7 to 6 inches: Fine sandy loam 6 to 17 inches: Gravelly fine sandy loam 17 to 20 inches: Unweathered bedrock 20 Custom Soil Resource Report Minor Components Woodbridge Percent of map unit: 5 percent Ridgebury Percent of map unit: 4 percent Landform: Depressions 711D—Charlton-Rock outcrop-Hollis complex, 15 to 25 percent slopes Map Unit Setting Mean annual precipitation:45 to 54 inches Mean annual air temperature:43 to 54 degrees F Frost-free period: 125 to 240 days Map Unit Composition Charlton and similar soils: 50 percent Rock outcrop: 16 percent Hollis and similar soils: 15 percent Minor components: 9 percent Description of Charlton Setting Landform: Ridges, hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape; Convex Parent material: Friable coarse-loamy eolian deposits over friable coarse-loamy basal till derived from granite and gneiss Properties and qualities Slope: 15 to 25 percent Surface area covered with cobbles, stones or boulders: 1,5 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.60 to 5.00 inlhr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity: Moderate (about 7.5 inches) Interpretive groups Land capability(nonirrigated): 6s 21 Custom Soil Resource Report Typical profile 0 to 4 inches: Fine sandy loam 4 to 28 inches: Gravelly fine sandy loam 28 to 60 inches: Gravelly fine sandy loam Description of Rock outcrop Setting Parent material: Granite and gneiss Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: 0 inches to lithic bedrock Interpretive groups Land capability(nonirrigated): 8s Description of Hollis Setting Landform: Hills, ridges Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Convex Parent material: Shallow,friable loamy basal till derived from granite and gneiss over granite and gneiss Properties and qualities Slope: 15 to 25 percent Depth to restrictive feature: 10 to 60 inches to lithic bedrock Drainage class: Somewhat excessively drained Capacity of the most limiting layer to transmit water(Ksat):Very Iow(0.0 0 to 0.00 inl h r) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity:Very low(about 2.5 inches) Interpretive groups Land capability(nonirrigated): 6e Typical profile 0 to I inches: Muck 7 to 6 inches: Fine sandy loam 2 to 17 inches: Gravelly fine sandy loam 17 to 20 inches: Unweathered bedrock Minor Components Woodbridge Percent of map unit: 7 percent Ridgebury Percent of map unit: 2 percent Landform: Depressions 22 Custom Soil Resource Report 23 Soil Information for All Uses Soil Properties and Qualities The Soil Properties and Qualities section includes various soil properties and qualities displayed as thematic maps with a summary table for the soil map units in the selected area of interest.A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components. This aggregation process is defined for each property or quality. Soil Qualities and Features Soil qualities are behavior and performance attributes that are not direct) measured q p Y but are inferred from observations of dynamic conditions and from soil properties. Example soil qualities include natural drainage, and frost action. Soil features are attributes that are not directly part of the soil. Example soil features include slope and depth to restrictive layer.These features can greatly impact the use and management of the soil. Hydrologic Soil Group Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long- duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. 24 Custom Soil Resource Report Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential)when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table,soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (AID, BID, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. 25 Custom Soil Resource Report -Map-Hydrologic Steil Group CN 329400 329470 329540 329610 329630 32 750 32 820 329390 329960 330030 26 8!15' 2 3$ 15- \\ \ t IN 3 \ R im \04 04 \\ \� ti \` "tl \\ \\ LO ®_ `\ \\\ \\ \ _\ o� \ C14 - Nr y� \\ 04 \ � C%4 20 3$`1" - 329400 329470 3229540 329610 329680 329750 329820 329890 329960 330030 p Scale;1:3,090 if printed on A size .5 11' sheet. N Meters o - 40 80 160 24 Feet 0 150 3GO - 600 90Q Custom o eso rce Report MAP LEGEND MAP INFORMATION Area of Interest 0Map Scale: :3,090 if printed on A size(8.5 x 11")sheet, Area of interest(A01 The soil surveys that comprise your A01 were rapped at 1:1 840. Soils Soil Map Units Please rely an the her scale an each map sheet for accurate reap Soil Ratings measurements. A Source ofMap: Natural resources Conservation Service Web Soil Survey URL http:l/websoilsurvey.nrcs.usda.gov B Coordinate System; UTM Zone 19N NAD83 BIB This product is generated from the US DA-NRCS certified data as o C the version date(s)listed below.. Soil Survey Area; Essex County,Massachusetts,Northern Part C Survey Area Date. Version 8,Aug 11,200 Net rated or not available Date(s)aerial images were photographed. 7/1 OM03 Political Features Cities The orthophoto or other base map on which the soil lines were Water Features compiled and digitized probably differs from the background Oceans imagery displayed on these naps.As a result,some minor shifting of map unit boundaries may be evident.. Streams and Canals Transportation Rails Interstate Highways US Routes Major Roach Decal Roads Custom Soil Resource Report Table—Hydrologic Soil Group . :.....: :. '.'.. .. '.. '. ..... Y r....og�c a rou ry FY laY .. .. umrxa a ni ssex Cooun assay use vrt ern Part 'tap unfit sy►nbol Map unit name Rating Adres in AC]f Percent-0 f ADl 1 Water 0.3 0,6°/° 38A Pipestone loamy sand,0 to 3 B 3.o 7.5% Z. percent slopes 51 A Swansea muck,0 to 1 percent D 1.8 4.6% slopes 52A Freetown muck,o to 1 percent D 7.9 20.1% slopes 253B Hinckley loamy sand,3 to 8 percent A 0.3 0.8% slopes 253C Hinckley loamy sand,8 to 15 A 0.2 0.5% percent slopes 260A Sudbury fine sandy loam,o to 3 B 8.7 22.2% percent slopes 421 B Canton fine sandy loam,3 to 8 B 2.5 6.4% percent slopes,very stony 710E Canton and Chariton fine sandy B 3.5 9.0% Ioams,steep,extremely stony 711 C. Charlton-Rock outcrop-Hollis B 5.1 13.0% complex,8 to 15 percent slopes 711 D Charlton outcrop-Hollis B 6,0 15,3°/° complex, 15 to 25 percent slopes Totals for Area of Interest 39.4 100.0% Rating options --Hydrologic Soil Group Aggregation Method: Dominant Condition Component Percent Cutoff Nome Specified Tie-break Rule: Lower 28 References ... ........................................... American Association of State Highway and Transportation Officials(AASHTO).2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWSIOBS-79131. Federal Register. July 13, 1994, Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydr c soils of the United States. Hurt,G.W.,and L.M.Vasilas,editors.Version 5.0,2006, Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://soils.usda.gov/ Soil Survey Staff. 1999. Soil taxonomy:A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:]Isoils.usda.gov/ Soil Survey Staff. 2006. Keys to soil taxonomy. 1 oth edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http://soils.usda,gov/ Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.glti.nres.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http:l/soils,usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://soils.usda.gov/ 29 Custom Soil Resource Report United States Department of Agriculture, Soil Conservation Service, 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. 30 l �I f. 1 I j ... jm�@Q Y 1,i�„'Ie ,,...gg,,,,�II' l r';"✓/ ,',')��r%/°:;, rii "'i ,�.;%,-r %,/'li'/ "r;r:;,,,",,,;,,,,, �J�7 F ,,, r„ o � 1 s /';i//iir lil ;1uld�ll uu r 0 1 Ili � i J i r � v i r 1 / y1' ski � ' fly; I i r i I II; l r i f I r Infiltration Test [�7a Sutton Hill Center, North Andover, MA Test: Infiltration-1 Area Mariotte Tube Volume Test Date: 24-Sep-10 inner Ring: 28.97 1.7917 ml/mm Tested By: Mark H.Gates, P.E. Annular Space: 62.39 4.4067 ml/mm Calculations By: Mark H.Gates, P.E. Depth to Water Table: >108" Water Temp(F): 720 Air Temp(F): 720 Flow Readings Infiltration Rates(Velocity) Elapsed Time Annular Between Inner Ring Space Inner Ring Annular Observations Reading Mariotte Tube Reading Mariotte Tube Rate Space Rate Observation Time (min) (mm) Flow(ml) (mm) Flow(ml) (cmlhr) (cmlhr) Remarks 1 9:06:18 - 592 - 530 - 2 9:10:26 4.13 556 64.50 500 132.20 32.32 30.76 3 9:11:48 1.37 544 21.50 490 44.07 32.58 31.01 4 9:17:18 5.50 498 82.42 450 176.27 31.04 30.82 5 9:24:00 6.70 446 93.17 400 220.34 28.80 31.63 6 9:30:55 6.92 396 89.59 350 220.34 26.83 30.64 7 9:39:10 8.25 334 111.09 290 264.40 27.89 30.82 8 9:44:42 5.53 296 68.08 250 176.27 25.48 30.64 9 9:51:30 6.80 246 89.59 200 220.34 27.29 31.16 10 9:58:40 7.17 192 96.75 150 220.34 27.96 29.57 Inner ring average infiltration rate=28.91 cmlhr= 11.38 inlhr Annular space average infiltration rate= 30.78 cmlhr= 12.12 inlhr Note: For design purposes use 2.41 inlhr to be consistent with DEP's reccomended infiltration rate for Loamy Sand i TSS Calculations TSS Removal Calculation Worksheet Project: Sutton Hill Center, North Andover, MA Date: 10/14/2010 Location: Discharge to Isolated Vegetated Wetland B Prepared : MHG p Y A B C D E Amount Removed Remaining Load BMP TSS Removal Rate Starting TSS Load (BxC) ( Stormce for STD 450i 52% 1.00 0.52 0.43 Infiltration System 30% 0.48 0.38 0.10 Total TSS Removal = 90%