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HomeMy WebLinkAbout2011-08-02 Planning Board Supplemental Materials (21) Rwr d inc. t �7E ) 687 3828 // II consultants Methuen, Massachusetts 01844 lac. Tee. (978) 683-51W 3828 Fax1 ftan6-5100 w.vw.andoveremaullan[s.com July 26, 2011 North Andover Planning Board Town Offices 1600 Osgood Street North Andover, MA 01845 RE: Land Disturbance Permih 140 Academy Road at Stevens Strew Horth Andover, MA Ladies and Gardener: Enclosed please find attached: • Revised site design plan set sheers 1, 2 ,3, 4, 5 and 6 of6, prepared for Tom Pazem axle, dazed November 10, 2010., last:revised 07-26-I1, 4 copies. • "Erosion& Sediment Control Plan', prepared for Tom Tabernacle,dated April 21, 2011, last revised 07-26-11, 4 copies. The attached plans were revised to incorporate the Net review comments contained in a letter to the North Andover Planning]band from Lisa Eggleston, PE of Eggleston Environmental, dated July 14, 2011. The revised plans include the following: Comment 1: The June 28, 2011 calculations indicate that the roadway in the vicinity of the existing culvert will still be overtopped under large storm (25-yr and greater) conditions, albeit to a lesser extent. Consideration should be given to Doing a larger pipe with capacity to convey the entire 25-yr swam flow. Response: We have not increased the size of Ne pipe in the current revision. We coni emainly do so, but only if so conditioned by Town of North Andover town officials. Comment 2: The project will require an casement for the proposed work on private property, at the spillway outlet of the culvert that is being replaced. Response: Noted. The Applicam, Tom Patenaudc, is in the process of obtaining the external. Clvll Erigemars 0 L Surveyors • Lantl Planners Comment 3: The proposed tlrop inlet should have a beehive grate, similar to the catch basin being replaced. Response: The drop inlet demi)has been revised to require a beehive frame and gone, as suggested. Comment 4: A detail has been added to the plans showing weep holes in the retaining wall every 50 R to allow groundwater through and relieve hydrostatic pressure. 1 do, however, still have maces that no vegetated drainage ways for Me upgradient Bows are provide, and that the grading is actually toward rhe house foundation and the driveways. Directing Bows onto the driveways is not acceptable &am a water quality or safety standpoint. Response: The grading behind the houses on lots 3B,4, 5 and 6 has been revised to provide swales to discharge any water Bow from the weep holes around the dwellings and away from the driveway, side. Comment 5: The O&M plan calls for the homeowners to keep the culverts clear of blockages,and they are likely to be motivated to do so. It may, however, be prudent to add sash racks on the upgradlent sides of the culverts to prevent ports balls and the like from getting into the culverts. Response: We have not added Inch racks to the inlet sides of the culverts. It is unlikely for the culverts to he blocked and it is possible that the grams would create more of problem with blockages and hinder any maintenance work. Comment 6: The project entails disturbance of more than one acre of land and is therefore subject to the EPA's NPDES Phase If Construction General Permit. The Applicant has filed a Notice of Intent for coverage under the permit, and a Construction Stormwater Pollution Prevention Plan (SWPPP), dated April 21, 2011, was included with else original application fackN. The Construction SWPPP should be updated to reflect the meant revisions to the project design, and should also incorporate the Erosion & Sediment Control Criteria (Section 8.2) of the North Andover Stormwster and Erosion Control Regulations, as they include several specific requirements not spelled out in the SWPPP. Given the steep slopes and total area of disturbance proposed on the project site, I also recommend a pre- construction meeting with the contractor to discuss implementation of the erosion & sediment controls and encourage either the Planning Board or the Conservation Commission to consider requiring an independent Environmental Monitor for the project Response: Just a clarification, we have prepared all the necessary documents for filing a Notice of hilent with the EPA, but we have not filed it yet. Upon approval, and prior to sharing construction,the Notice of Intent will be submitted to the EPA, as required. The attached Erosion& Sediment Control Plata has been revised to reflect the latest grading and design, as suggested. Also, notes from the Section 8.2 have also been added to the plan to highlight construction requirements not depicted pictorially. The Applicant is working with his Contractor on a Phasing Plan and it will be submitted to the Planning Board prior to construction as required by Section 8.2 (and Note 8 on the attached plan). We agtte that apm-conswcrion meeting is a goad idea and defer to the Town's decision regarding an envimvmmtal monitor. In addition to Ne revisions noted above, we also revised the culvert under Wt 2B form an 8" ductile iron pipe to a 12" ductile ban pipe in response to a request from Town Engineer, Gene Willis. Should you have my questions concerting our revisions noted above, or require anything else, please feel free to contact as. Sincerely, ANDOVER CONSULTANTS, INC. James S. Fairweather 11, P.E. Project Engineer Enclosures cc Tom Pateoaude -ozz 20' WIDE SANITARY SEWER EASEMENT \ / -216 / ole- / / / // / / // / -214 / � LIMIT 0 CLEARING AND WORK NORTH PARISH /// �� �/ ��/ �/ / // ' - - - - - - - - 212 CHURCH / / -961 ,� N/F // // / / � ' /j �� LIMIT OF CLEA ING AND WORK ROBERT STEVENS '� �� / / ��� 4� i 212 - °Ie _ N/F DOWNES 802 . _ � e6 \ � LOT \ -,204- - 7/- 28,582 28,582 S.F. \LOt\ 3B LOT 6 \ \ \ \ \ \ \ 9,789 S.F\ \ \ \\ 21a � / /� / // � /// / / � � - 'CCST 5 \ \ \ \ / / X214 ,LO 4 / / / - 29.x28 S.F. - `\ EXIST. �O \\ \ \ \ \ \ \ \ _ - - �� / / / / 33 501-5.x-- l \ \ \RETAIN G - J.���O.O \ \ \ \ \ \ \ \\ \ \\ ez\\ \ \ � � \ - _ - / // '21035,6� r! // � / /// /- - - _ - - - - - - -/ _ WA ,c� \ \ \ \ \ \ \ \ / - _190- - `O`rF` \ \ \ \ �po \ \\ \ \ \ -. � � 216 / ' // j/ ' , / �� � � // _ - _ � - - _200 -ORILIAMENTAL FENCE--4 FOOT HIGH (typ.)- \ �\ �\ �CQ \ \ °� \ �� / / / - - - - - PROP. RET. WALL \ PROP. SERVICE \ \ - 194-SEWER / - - - - - - - \ LO -208- - OP. 0'Aj \ \��� \ \�- - - - - - - - - - - � - - - - - SWALE 1 SWALE W / - - - - - - - - _ - - / / S PSE \ \ \ \ F \ - - - - _ - - - / / / / - - - - - - - _ WATER \ \ \ _ SWALE _ I \ \ SERVICE \ \ - - - - - - - - - - - _ - - - - - - - - - - - - - - - PROP. RET. WALL r \ _ \ \ \ ` - - - - - - - - - _ _- PRO RET. WALL � \ - -- - - - - - - - - - - - - - - - - - - -061- 7= - �\ \ \ \ PROP. RET. WALL '� - �_ � -202- - -/•G-' ' I _ / / i 1g�1 / �g2 I� \ / - - - I -061 - - 777\ Igo (176.5) - - --73V178.5) � -PROPOSED- x x - - aa� - - - I - - PROPOSED - IIr - - (179.5) PROPOSED' I PROPOSED - I - - - ----_-I --- - - G.F.=176.5 i- DWELLING_ (182.5) DWELLING IG.F.=176.5 PROP. DRIVE -PROP. DRIVE_ - - - - - T.F.=186.5 -sa-�- \ -DWELL-ING- , DWELLING -176- _I T.F.=186.5 GF=fi-82.5 T.F.=192.5 OP. DRIE T.F.=189.5- $ C.F.=178.5 (i _)` I I C.F.=178.5 PROP. DRIVE L - .F.=18 .- _ C.F.=181.5 N (179 / x x _ W• - - W - + - }- - I - , / - �A ,n+►�a P&0' WALK , vas R9R.-WALK ' 3 : 1 I \ \ s, I I mo PROP. WALK I _ n S \ ®�-s \\\ \ 1 [ sao PROP. WALK ' N - \ N ,1a2' 3 II DI - - - C - - - - - - - - \ STOP \ EX. 6" PVC - - - SIGN \ \ _ ROOF INFIL: typ. N - - - -L $� - - \ INV.=174.04 \ \ \ \ _ _ / PROP. RET. WALL(typ.) I - - - - - EX. 6" PV 4 \ 1=174.40 - - - . - ♦ _ s i! TP - _s<<_ U.P. 63 I \ - - ♦ / - - - ---- - - \ PROP. SEWER- INV.=174.22 \ \ \ � � � � _ - - S / � � j SERVICE _ - - - - - - - - - - - - - - - - EX. 12" CPP TP-7 N - TP-a :;. •,• \ - - _ PROP. RET. WALL _ -INV.=168.46 1=168 _ J i1�6 ` 1=1 - - - - -6 r N _ I - r i (to �eTowered) 36 _ _ - - - _ PROP. SEWER - _94L I 168 78 _ _ / ♦ 71.58 _ - - SERVICE � � _ - - - HDWL - 1=171.14 - - - - - I _ - - - _ ' - ` - - - - - - - - - - - - - - - - -180- - - -I - - - - - U.P. - - - - - - U.P./657� -z U.P.�165� Off\ \ CB � \ _ - - - - _ _ _ - - ♦ -_-_ _ - - - - - - - - - - - - - X59 _ - - - I =77-- ;p I _ - - _ RIM=174.65 � \ \ \ - - - - -LL -LL N INV.IN=173.51 (SW) 175.10(eg) _P./662 - - - - - e 07: - - -x - INV.IN=173.49 (NE) _ INV.OUT=172.41(12") - - - - , - - - - IL 1 -I 170.38(e9) 4( e) -� nose � 1=174.15 20 L.F. 12"DI _ _ _ - N - _ _ EDGE OF PAVEMENT to PROP. SEWER - - I PROP. WATER P 173.43(eg) 10" VC s r'., EX. SUMP = 170.65 S-0.0125 17s.00(ey) - -_ - _ _ 8 VC �y INV.IN=173.10 (NEW 12") _ 8" PVC S I S SERVICE S S-0.0100 S S S - NEW SUMP = 168.40 � S S \ S=0.0100 SMH-ex BIT. CONC. BERM 3 PROP. WATER 3 " � PROP. WA � 22 L.F. 12' DI 36 L.F. 12 HDPE 2' WIDE x 6 DEEP 3 EXIST. WATER MAIN RIM=175.51 3 DIVERSION (typ.) PROP. SEWER - SERVICE PROP. WATER �S=0.0200 42 L.F. 12 DI DRIVEWAY SWALE t _ INV.=166.50 �� - �s<<\ SERVICE / �-ll SERVICE S=0.0100 / SERVICE S=0.0200 __ i HYDRANT 12" W 12 W \ 12 W / 12 W 12 X 12° W - / - - - - - - - - - - - - - -- _1ss - PROPOSED SMH 2 - - - - - ,c- x --max EDGE OF PAVEMENT _ -- BENCH - / - - RIM=171.12 MARK "-SL - - - - - - -_-_- ___- _ - - - - / ' MAG NAIL SET SIGN PROPOSED SMH-1 PROPOSED SILT FENCE _ _ \ EX. 12" CPP STREET- INV.=164.00 / ELEV.=175.70' (NGVD) RIM=174.77 991 I I INV.=166.65 RI ,1 �� I STEVEN SINV.=167.40 DROP INLET INV =166.03 (new) _ _ _ - -164 PROPOSED SWALE �- - - - - - - INV.IN=169.66 (12") RIM=170.0 WITH STONE TRENCH - / PROPOSED SWALE WITH 68.0 UNDER OAT-1 - INV.IN=163.29 (24") STONE TRENCH UMDER 164- THR = - INV.OUT=163.10 (24") REPLACE EXISTING CATCH 1=167.05 IN - - - - - 2C 3C 1=166.75 OUT _ - - _ _ - X00 BUFFER ZONE / �-- - . . .�I ® - - . . 5C� BASIN WITH NEW STRUCTURE LOT DISTURBANCE SUMMARY: SUMP=162.75 - - - J ,I, PROVIDE "SNOUT" OIL TRAP • 162- - _ AND HD "BEEHIVE FRAME & LOT TOTAL LOT DISTURBANCE - - - - �� _ L I�, 6C F GRATE U 1Ii, 1Ii, 1,I, ,1�, �! AI, 2B 19,850± S.F. - i1, • . / 3B 24,855± S.F. RIPRAP APRON 00 \ 4 16,375± S.F. 3'W x 13'W x 121 LEGEND: 5 18,110± S.F. "REVISED 07-26-11: PER PEER REVIEW COMMENTS NOTES: 6 19,525± S.F. - - "REVISED 06-27-11: PER REVIEW COMMENTS . . . _ . _ 2A \ _ - - , �1$$ EXISTING CONTOUR "REVISED 04-21-11: GENERAL REVISIONS ����� 1.) THE INTENT OF THIS PLAN IS TO SHOW THE PROPOSED 6) USE OF FILL MATERIAL CONTAINING HAZARDOUS MATERIALS IS 11.) THE LOCATION OF EXISTING PIPES, CONDUITS, AND OTHER PROPOSED CONTOUR CONSTRUCTION OF 5 DETACHED SINGLE-FAMILY HOMES WITH PROHIBITED. UNDERGROUND STRUCTURES OR UTILITIES ARE SHOWN _ . .3C EDGE OF WETLANDS LOT GRADING PLAN ! ,i1, �!!\ 1A APPURTENANT GRADING, DRIVEWAYS AND UTILITY SYSTEMS. BASED UPON EXISTING RECORD INFORMATION AND ARE NOT 7.) THE LIMITS OF WORK (i.e. SILT FENCE LINE) SHALL BE STAKED WARRANTED TO BE CORRECT, OR THAT ALL SUCH FEATURES 0-10" VC EXISTING SEWER STEVENS STREET 2.) THE WORK IS SHOWN ON A PORTION OF THE PROPERTY �FARING,UT AND INSTALLED PRIOR TO START OF CONSTRUCTION AND SITE ARE SHOWN.OR VERIFYINGHALL ITE CONTRACTOR SHALL UNDERGROUND UTILITIES,BE STRUCTURES, 12" W EXISTING WATER NORTH AND 0 VE R , MASS DEPICTED ON NORTH ANDOVER ASSESSOR MAP 96 PARCEL 33. PIPES, ETC. PRIOR TO CONSTRUCTION. THE SITE CONTRACTOR THE PARCEL IS WITHIN THE RESIDENCE 3 ZONING DISTRICT. 8•) DRAINAGE STRUCTURES SHALL BE CLEANED AT THE COMPLETION OF SHALL ALSO BE RESPONSIBLE FOR CONTACTING DIG-SAFE, IN EXISTING DRAINAGE PREPARED FOR: TOM PATENAUDE THE CONSTRUCTION PERIOD AND ALL STORMWATER FACILITIES COMPLIANCE WITH THE REQUIRED TIMELINES AND ALSO BE DATE: NOVEMBER 10, 2010; **REV 04-21 -11 3.) THE WETLAND MAPPING WAS PERFORMED BY BASBANES MAINTAINED IN ACCORDANCE WITH THE OPERATION AND RESPONSIBLE FOR ALL NECESSARY PRE-MARKING PRIOR TO EXISTING TREE LINE **REV 06-27-11 9.) WETLAND CONSULTING INC. AND LOCATED BY AN MAINTENANCE SCHEDULE THEREAFTER. COMMENCING ANY EXCAVATION ACTIVITY. SCALE: 1 = 20 INSTRUMENT SURVEY PERFORMED BY ANDOVER CONSULTANTS, X(182.5) PROPOSED SPOT GRADE **REV 07-26-11 INC. IN AUGUST 2010. HAULING OF EARTHWORK TO OR FROM THE SITE SHALL BE 12.) SLOPES SHALL BE LOAMED (4 MINIMUM), SEEDED AND RESTRICTED TO THE HOURS OF 7:0 AM TO 6:00 PM MONDAY THRU STABILIZED WITH EROSION CONTROL MATS MANUFACTURED BY QS S PROPOSED SEWER 4.) RECORD OWNER IS: FRIDAY ONLY. NORTH AMERICAN GREEN, OR EQUAL, AS SOON AS FEASIBLE. a n d o ve r ' PROPOSED TREE LINE consultants ROBERT STEVENS 10.) EXISTING CONDITIONS WERE OBTAINED FROM AN INSTRUMENT 13.) PROJECT PROPONENT: 140 ACADEMY ROAD FIELD SURVEY CONDUCTED BY ANDOVER CONSULTANTS, INC. IN TOM PATENAUDE PROPOSED SILT FENCE inc. NORTH ANDOVER, MA 01845 JULY AND AUGUST 2010. TOPOGRAPHY BASED UPON 1929 NGVD 100 SALEM STREET DATUM. NORTH ANDOVER, MA 01845 1 East River Place BENCHMARK: SET MAG NAIL IN EDGE OF PAVEMENT ON Methuen, Mass. 01844 Professional Engineer 5.) PLAN REFERENCES (ESSEX NORTH REGISTRY OF DEEDS): EASTERLY SIDE OF STEVENS STREET APPROX 60 FEET 0 20 40 60 80 Ft. PLAN NO. 16348 NORTH OF THE CENTER OF PAVEMENT OF GREAT POND PLAN N0. 16349 ROAD, ELEV=175.70 P: \1 0\1 0-23\DWG\SITE-ENG.DWG FSHEET 2 OF 6 0 5 10 20 Meter FINISH GRADE \ 190• . . . •190 190 . . •190 190 . . . . •190 FINISH _ EXISTING q GRADE - o GRADE PROPOSED WALL o0 00 \ 170. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \. . . . . . . . . . . . . . . . . . . . . . . . . . .170 0^ EXISTING EXISTING 4 VGRADE 00 0 - \ 4 EXISTING 12" CPP CULVERT \ GRADE +1 o L \ Lq Ln 8 PVC 0 PROPOSED 12" CPP CULVERT \ 00 II \ \ I I 5=0.0100_ \ EXISTING 12" CLDI \ EXISTING =340 \ WATER MAIN VERIFY z z_ GRADE CLEARANCE WITH 8 PVC TEST PIT PRIOR TO 1 5=0.0100 �_ \ 180 • INSTALLING SEWER . . •180 180 . . . . . . I� � •180 180 • . . •180 = 5' 18 g p QJG p s\ 6''A I FINISH 00 1`0 N ( � 45° BEND � O� L 45° BEND s �' GRADE � � INV.=175.3± . INV.=175.65± . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O. A160. o .In � 160 M �, II a, �, II PROPOSED SMH-2 �, II �s8 � �O 45° BEND n c c `n .� c > @ STA.3+40 .� O INV.=173.95± ALO RIM=171.12 ALO I o a) 0 -- o (0 U o ° = 0 G' ° ' PROVIDE m 0 00 J 0 000 _j m U 00 INV.=164.00 J cn 0 00 p PROPOSED SMH-3 �\,s INFILTRATION RIM=171.06 s PRESSURE PROVIDE PROPOSED SMH-1 INV=162.15 RATED TRENCH P RAT DRE © STA.0+00 Q�G PIPE BOT.=170.9± PIPE RIM=174.77 EXISTING SMH 170. . . . . . . x. 00 170 170 . . . . . . . . . 170 170 . . . . . . .170 INV.=167.40 ® STA.6+80 �p0 �,y RIM=162.76 1181, p\lG U S � 45' BEND INFILTRATION INV.=154.90 INV.=170.9± TRENCH S,0 0302 (2)45° BENDS BOT.=168.8± 150. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150 O L�50 INV.=167.9± 8" SEWER PROPOSED SMH-B INV.=167.33 45° BEND 00 c0 cD N o I q (0 o In 00 INV.=16 6.8± � STA.0+50 6" PVC -/ 8" SEWER _ S=0.0200 I N V.=166.28 I�j N o r_� 4 N EXISTING SMH RIM=175.50 L-20' 6" PVC © STA.0+00 INV.IN=168.70(6") S=0.0200 RIM=175.51 INV. IN=168.60(8"-STUB) L=16' INV.IN=167.00 INV.OUT=168.50 0+00 1+00 2+00 3+00 4+00 5+00 6+00 PROVIDE WATER TIGHT FRAME & COVER PROFILE- - STEVENS STREET - SCALE: 1"=40' HORIZ., 1"=4' VERT. . . . . . . . . . . . . . . . . . . . . . . . . . . . .160 160 . . . . . . . . �. . . 160 160 160 Ln 0 00 o N CO 00 M In 0 00 r- I'7 00 4 (6 N 0+00 1+00 0+00 0+00 PROFILE PROFILE PROFILE LOT 3 SEWER SERVICE LOT 4 SEWER SERVICE LOT 213 SEWER SERVICE SCALE: 1"=40' HORIZ., 1"=4' VERT. SCALE: 1"=40' HORIZ., 1"=4' VERT. SCALE: 1"=40' HORIZ., 1"=4' VERT. 20• MADE SANIIA, SEWER EASEMENT EXISTING SAW CUT PAVEMENT PAVEMENT FOR TRENCH <901-18oZ \j\C �` T CLEARING AND WORK OOZ- - - - fit \ 0 / �/ \ \ \ �!� N/F / / / / �2� / EXISTING BASE EXISTING BASE �� NORTH PARISH / / / / / 6/ / _ - - - -212 � \ CHURCH / 1 / � \ \\ � _ - - -198- / 6LJ / \ N/F / / / / / / MIT OF CLEARNG AND WORK ROBERT STEVENS // / / / / // �21ai .212/ - o! COMPACTED owNE Ds BACK FILL NEW PAVEMENT 96 L- - TO MATCH EXISTING � _ _ - - - - (959 STANDARD / / / / PROCTOR) aal- - �� / \ \ \ THICKNESS (4" MIN.) 981 e LOT 2B \ \ \ �, \ \ ?wF /� / � / / / /' - -2p61 - - - - - - - - \ \ sl \ \ \ \ \ o� 36\ \\ - - - � / 1�/ // /// - _ _2oa- LOT \ \ \ \ \ \ \ \ 218- -214 / / / /// / - tor-5 _ _ _zOz_ - - - - _ - - -\ \\ \901> TRENCH PAVEMENT \\\ EXIST. \ \ \ \ - - \ \\ RET 1 190 '4�y _ \ \ \ \ \\ \ \� \\ \ 216- / / / �210� // / // _ _ -200 - - - - ENTAL FENCE-4 FOOT HIGH ky-p- \ \ _ \ \ \ \ ROP.RET.WALL - 11°z\ PATCH DETAIL ilk NOT TO SCALE �i \ \ ` - \� / 2 � - - -194- \961- - - - - 6/ \ 00 O� \ _ - - - / / i - i\ / / -_ � � _ - _ - l\ asl 6l�_ 61 s \ \ \ \ \ Ef.W /// ROP.R.WALL 'C Z61- -e l _ PROP.RALL / X061 16 '�•�+ ' - - �'4'�+\\\8L L-�1\ \ \ \ \ 9°'s \ 0� - - �/ _ _ _ � � i � � I� 190 - - - - � � - - - - -I- -RROp06ED 88 L - x.10$ WEOJ I $ / T.F.-188.5 N11- O.F.-47&5 - - - G Fr178.6 T.F.-188.5 - -98 L- X1$6 0&1 \ Z,F�18�5 T.F.-192.5 - - GFr1f9.5 'TFr1�1.8/ �1a C.F.-178.6 s6 9 � / - _ � -Cf+183 - - � /C,Er 5 166 - - - - - - - - / - - 8L- // AL 116 \ \\ \ - - - � _ / / / Z8 a' _A50 \ PR wALL(bvJ / li / / -j- -RO_IbIR6 W J rt �3a $RET - ROP WA; / . 1/J6/- - s SEWER PLAN & PROF ILE S is , z4l PE R=:::'_ 9 STEVENS STREET `-EGOF PAVEMENT S=0.0100 PROPOSED SMH-13 8PVC S S '°< B• PVC RIM=175.00 STS S ; 8" PVC S=0.0100 - 8" PVC SS=0.0468'/--w_ NORTH ANDOVER , MASS INV.IN=168.70 : �y : > / 2� - / 12" w INV.OUT=168.50- '- 174- ,?•W ,Z•W / ,2•W / 12' -1' -,2•w ,rw '2'W 12�W 12�W PREPARED FOR: TOM PATENAUDE 8" PVC S=0.0302 / BENCH MARK % / - - _ _- _ - 6 o X ** EDGE OF PAVEMENT FT WJE_ �/ _ � -_= PROPOSED SMH-2 \ DATE: NOVEMBER 10, 2010; REV 04-21 -11 / MAG NAIL SET ggL� - RIM=171.12 GA L=50' ,� ELEV.ns.�0• (NGVD) ��SILT -164 SMH-ex » > 1� PROPOSED SMH-1 -� - INV.=164.00 �� PROPOSED SMH-3 RIM=162.76 SCALE: 1 =40 **REV 06-27-11 _ RIM=171.06 \ INV.=154.90 **REV 07-26-11 164- - - - m _ �1SMH-ex -162 3c o� INV.=162.15 Ak A5 AL do?� �f ��o' \ R M175.51 INV=167.40 1 2- - - - - - _ - - - -'°0 BUFFER ZONE -1�0 ZA . � . . _ A. o < � INV.=166.50 AL AL AL AL A` °L A` A` �•A6C L a n d o ve r A` AL AL \ 3A AL 6C AL AL consultants AL AkA• - . . = AL A AL AL AkL ,,k ,Ik Dula�A • 1 East River Place Methuen, Mass. 01844 Professional Engineer "REVISED 07-26-11: PER PEER REVIEW COMMENTS 0 40 80 120 160 Ft. "REVISED 06-27-11: PER REVIEW COMMENTS EEEEEEI \10-23\dwg\SITE-ENG.dwg "REVISED 04-21-11: GENERAL REVISIONS FSHEET 3 OF 6 0 10 20 40 Meter