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Home My WebLink AboutSD-427-5LAI 0 FOR REGISTRY OF DEEDS USE ONLY / Amr-1A I DECLARE; TO DEVELOPMENT DATA TABLE REQUIRED PROVIDED TOTAL LAND AREA 50,000 S.F. 84,949; S.F. (1.95; AC.) AREA IN VEGETATED WETLAND - 3,466; S.F. DEVELOPABLE SITE AREA - 81,483; S.F. AREA IN COMMON OPEN SPACE 20 ,370; S.F. (25% MIN!) 20,463; S.F. (25%) AREA IN USABLE OPEN SPACE 17,500; S.F. (3,500 S.F. PER UNIT) 40,000; S.F. IMPERVIOUS SURFACE (PAVEMENT) - 6,799; S.F. AREA AND PERCENTAGE OF SITE - 10,669; S.F. (125 °A) COVERAGE OF BUILDINGS DENSITY OF DWELLING UNITS 5.48 UNITS MAX. (PER WORKSHEET) OR THEIR EQUIVALENT 200% MAXIMUM IMPERVIOUS SURFACE REQUIRED (16,990 ;S.F.) 20% IMPERVIOUS SURFACE PROVIDED (16,950 ;S.F.) 5 UNITS PROPOSED UNIT NUMBER BEDROOMS GFA LFA REST OF MY PROFESSIONAL VEHICLE TRIPS LOT 467 �l I7TON, AND BELIEF, THAT 6,808 S.F. 4,000 S.F. 2,808 S.F. ZARED IN ACCORDANCE REGULA77ONS OF THE 4.29 OPEN SPACE 4 6,740 S.F. 4,000 S.F. EASEMENT r 4.29 3 AREA =23,929tS.F. t o /IOf -05 2,889S.F. 9.55 4.29 "A TES, INC. DATE 4 6,232 S.F. `l 2,232 S.F. 25' BUFFER LINE 4.29 '5 2 - 1,200 S.F. - \ RIP RAP APRON PROPOSED SUBSURFACE INFILTRATION BASIN STC ® PROPOSED STORMCEPTOR TREATMENT UNIT CONC. WEIR GV ►� PROPOSED WATER GATE VALVE HvD� STRUCTURE PROPOSED HYDRANT e e PROPOSED SERVICE BOX AND _ - 50' BUFFER LINE BALL VALVE CURB STOP DRAINAGER" & INVE°RT SCBEUULE.- CB -1 DMH -1 ®�►,� BASIN TRICKLE i r''� PIPE / 266 / !/261.4 / ®\ ®� R= 267.50 DMH 2 INV. IN= 265.00 6' (INFIL -B) R =266.20 oe INV. IN= 264.00 6- (INFIL -A) INV. IN= 262.50 12" (STG1) / BERM ®\ INV. OUT--262.50 IT (FE-1) 26+ 45 261.5/ INV.= 261.90 STC-1 f R =267.00 INV. OUT-- 269.00 6- (CB-2) INV. IN= 263.10 IT (DMH -1) INV. OUT= 263.10 12" (DMH 2) BUILDING INV. OUT= 1266.50 So (C134) SfWER4 M iNV. OUT = x266.50 6' (DMH2) 1= 267.00 FT# - 2271 6 - - - `- t t ji DETENTION SMH-2 1= 268.00 LOT 468 j app / INV. IN= 264.50 1 =2 .fl0 + 264.5 FFE 273. BEM - 1 ='267! BSMT 26 264.5 �� ( GAR 264 _ WALK-01 / jt GAR. UN 1 _ _ a ) # FD RM ® ®® 1 D 264.5 ® 5' MIN. DEVELOPMENT DATA TABLE REQUIRED PROVIDED TOTAL LAND AREA 50,000 S.F. 84,949; S.F. (1.95; AC.) AREA IN VEGETATED WETLAND - 3,466; S.F. DEVELOPABLE SITE AREA - 81,483; S.F. AREA IN COMMON OPEN SPACE 20 ,370; S.F. (25% MIN!) 20,463; S.F. (25%) AREA IN USABLE OPEN SPACE 17,500; S.F. (3,500 S.F. PER UNIT) 40,000; S.F. IMPERVIOUS SURFACE (PAVEMENT) - 6,799; S.F. AREA AND PERCENTAGE OF SITE - 10,669; S.F. (125 °A) COVERAGE OF BUILDINGS DENSITY OF DWELLING UNITS 5.48 UNITS MAX. (PER WORKSHEET) OR THEIR EQUIVALENT 200% MAXIMUM IMPERVIOUS SURFACE REQUIRED (16,990 ;S.F.) 20% IMPERVIOUS SURFACE PROVIDED (16,950 ;S.F.) 5 UNITS PROPOSED UNIT NUMBER BEDROOMS GFA LFA SITE COVERAGE VEHICLE TRIPS OCCUPANCY 1 4 6,808 S.F. 4,000 S.F. 2,808 S.F. 9.55 4.29 2 4 6,740 S.F. 4,000 S.F. 2,740 S.F. 9.55 4.29 3 4 6,885 S.F. 4,000 S.F. 2,889S.F. 9.55 4.29 4 4 6,232 S.F. 4,000 S.F. 2,232 S.F. 9.55 4.29 '5 2 - 1,200 S.F. - 5.86 1.84 " ACCESSORY APARTMENT F � c_ 1 SHALLOW SWALE 15' MIN. 1. PROVIDE 2" RIGID INSULATION OVER ALL PROPOSED SEWER WHERE LESS THAN 5 FEET OF COVER. 2. ALL SEWER MAIN TO BE 6' PVC PIPE. INDIVIDUAL LATERALS TO BE 4" PVC PIPE. 3. ALL WATER MAIN TO BE 6" CLD1 PIPE. INDIVIDUAL LATERALS TO BE 1" COPPER OR 1" PE TUBING. 4. THE SITE CONTRACTOR SHALL BE RESPONSIBLE FOR EROSION AND SEDIMENTATION CONTROL MEASURES DURING CONSTRUCTION. POST CONSTRUCTION MAINTENANCE SHALL BE PERFORMED BY THE HOMEOWNER'S ASSOCIATION DECLARATION OF PROTECTIVE COVANENTS AND RESTRICTIONS. 5. STAKED HAYBALES WITH SILTATION FENCE, SHALL BE INSTALLED WHERE INDICATED ON THE PLANS AND IN OTHER APPROPRIATE LOCATIONS WHERE WARRANTED. THESE BARRIERS SHALL BE INSTALLED PRIOR TO THE COMMENCEMENT OF ANY WORK ON SITE AND IN ACCORDANCE WITH THE CONSTRUCTION PLANS. A SUPPLY OF HAYBALES AND SILT FENCE SHALL BE KEPT ON SITE TO REPLACE ANDIOR REPAIR BARRIERS THAT ARE DAMAGED OR DEGRADED. THE BARRIERS SHALL BE OBSERVED AND MAINTAINED AS NECESSARY ON A WEEKLY BASIS DURING CONSTRUCTION. 6. TEMPORARY INLET PROTECTION BARRIERS CONSISTING OF SILT SACKS WILL BE PLACED AROUND ALL CONSTRUCTED DRAINAGE INLETS. THE PURPOSE OF THE FILTER IS TO PREVENT THE INFLOW OF SEDIMENTS INTO THE CONSTRUCTED DRAINAGE SYSTEMS, INFILTRATION SYSTEMS IN PARTICULAR. THE BARRIERS SHALL REMAIN IN PLACE UNTIL A PERMANENT C O VER IS ESTABLISHED OR DIVERSIONS AWAY FROM THE INLETS ARE CONSTRUCTED. THE BARRIERS SHALL BE OBSERVED AND MAINTAINED AS NECESSARY ON A WEEKLY BASIS DURING CONSTRUCTION. 7. TEMPORARY DIVERSION SWALES AND MOUNDS WILL BE CONSTRUCTED TO DIVERT STORMWATER AWAY FROM AREAS UNDER CONSTRUCTION TO LIMIT SEDIMENT TRANSPORT. THESE DIVERSIONS WILL BE RELOCATED AS CONSTRUCTION PROGRESSES. HAY BALE CHECK DAMS WILL BE INSTALLED IN SWALES AS NECESSARY TO LIMIT SCOUR AND SEDIMENT TRANSPORT. 8. THE SURFACE OF ALL DISTURBED AREAS SHALL BE STABILIZED DURING AND AFTER CONSTRUCTION. TEMPORARY MEASURES SHALL BE TAKEN DURING CONSTRUCTION TO PREVENT EROSION AND SILTATION. ALL FINISHED SURFACES SHALL BE STABILIZED WITH FINISH MATERIALS OR PERMANENT VEGETATIVE COVER. SOME OR ALL OF THE FOLLOWING MEASURES WILL BE UTILIZED ON THIS PROJECT AS CONDITIONS MAY WARRANT: TEMPORARY SEEDING, TEMPORARY MULCHING, PERMANENT SEEDING, PLACEMENT OF SOD, HYDROSEEDING, PLACEMENT OF HAY, PLACEMENT OF JUTE NETTING. 9. DURING CONSTRUCTION, THE SUBSURFACE INFILTRATION I RECHARGE BASIN SHALL BE INSPECTED DURING AND AFTER ALL STORM EVENTS TO ENSURE THERE IS NO SEDIMENT ACCUMULATION OR DEGRADATION OF INFILTRATIVE SURFACES. 10. A CONTINGENCY PLAN TO ADDRESS THE SPILLAGE/RELEASE OF 10. PETROLEUM PRODUCTS AND ANY HAZARDOUS MATERIALS WILL BE IMPLEMENTED FOR THE SITE DURING CONSTRUCTION. SEE OPERATION & MATERIALS PLAN FOR DETAILS. 11. ALL PROPOSED ROOF DRAINS SHALL BE CONNECTED TO AN 11. INFILTRATION BASIN EXCEPT BACK (WEST) ROOF OF LOT 4. 12. RIM ELEVATIONS ARE APPROXIMATE. ADJUST ALL 12. CASTINGS TO FINISHED GRADE. THIS PLAN IS 774E SAME PLAN APPROVED BY 774E LEXINGTON PLANNING BOARD ON MAY 11, 2005. A NON - MATERIAL CHANGE WAS MADE TO THE PLAN TO CONSOLIDATE TWO PREVIOUS OWNERSHIP EN7777ES INTO SINGLE OWNERSHIP AS REQUIRED BY THE MASSACHUSETTS LAND COURT. I,- CLERK OF 774E TOWN OF LEXINGTON, MASSACHUSETTS HEREBY CER77FY THAT THE N077CE OF APPROVAL OF 'THIS PLAN BY THE LEXINGTON PLANNING BOARD HAS BEEN RECEI ED AND RECORDED AT THIS OFF70E AND NO N077CE OF APPEAL WAS RECEIVED DURING THE TWENTY DAYS NEXT AFTER SUCH RECEIPT AND RECORDING OF SAID NOTICE. TOWN CLERK DATE DWG No. 4159 18113- PEROB_SITE dwa SAWCUT & MATCH EXISTING PAVEMENT PROVIDE NEW BIT. CONC. BERM TO MATCH EXISTING WHERE REQUIRED ALONG ENTIRE SITE FRONTAGE. CONNECT PROPOSED 6" CLDI WATERLINE TO EXISTING 8" WATER VIA AN 8 "X8"x6" TEE. PROVIDE (2) 8" GATE VALVES AND (1) 6" GATE VALVE. CONNECTION SHALL BE MADE IN ACCORDANCE WITH THE TOWN OF LEXINGTON DPW STANDARDS. SMH -2 SAWCUT & MATCH EXISTING PAVEMENT CONNECT PROPOSED WATER & SEWER SERVICES PER TOWN OF LEXINGTON DPW STANDARDS (TYP.) SAWCUT & MATCH EXISTING PAVEMENT I DECLARE, TO THE BEST OF MY PROFESSIONAL KNOWLEDGE, 1NFORMA77M AND BELIEF, THAT THE PROPERTY LINES DEPICTED ARE THE LINES DIWDING EYJS77NG OWNERSHIP AND 7HE LINES OF STREETS AND WAYS DEPICTED ARE THOSE OF PUBLIC OR PRIVATE STREETS AND WAYS ALREADY ESTABLISHED, AND THAT NO NEW LINES FOR DIVISION OF EAIS77NG OWNERSHIPS OR FOR NEW STREETS AND WAYS ARE DEPICTED. ( MA�$ a F° Q Q� CHAP. 41, SECT. 81 -X ) KE� IN 9N. o. 96 FOR MERD INC. DATE sure ` me REWIS ONS 3 11101105 REVISE LOT NUMBERS JP KED 2 5105105 PER CON -COMI P.B. COMMENTS JPG MJD 1 3125105 ISSUED FOR NOTICE ON INTENT JPG MJD NO- DATE DFSrRIPTION BY 04K1 WAm,aa UAL ® PROPOSED PROPERTY LINE NORTHERLY SIGHT DISTANCE X07 PROPOSED CONTOUR LOT 2 ®- Eca - ® PROPOSED EROSION CONTROL BARRIER > 250' + lou PROPOSED SPOT GRADE > 250' - - - - WETLAND BUFFER LOT 3 RETAINING WALL 150; PROPOSED HOUSE PROPOSED BIT. CONC. PAVEMENT PROPOSED TREELINE EXISTING TREELINE s EXISTING VEGETATION { IN PROPOSED WATERLINE S PROPOSED GRAVITY SEWER ° PROPOSED DRAIN FD PROPOSED FOUNDATION DRAIN w PROPOSED WATER LINE ce PROPOSED CATCH BASIN FE ® PROPOSED FLARED END SECTION Dmm PROPOSED DRAIN MANHOLE FINFa PROPOSED SUBSURFACE INFILTRATION BASIN STC ® PROPOSED STORMCEPTOR TREATMENT UNIT GV ►� PROPOSED WATER GATE VALVE HvD� PROPOSED HYDRANT e e PROPOSED SERVICE BOX AND BALL VALVE CURB STOP DRAINAGER" & INVE°RT SCBEUULE.- CB -1 DMH -1 R= 267.50 R =268.50 INV- IN= 264.00 6' (INFIL -D) INV. IN= 263.20 12" (CS-1) INV. OUT--263.50 IT (DMH -1) INV. IN= 263.20 12" (CB-2) CB-2 INV. OUT= 263.20 12- (STC -1) R= 267.50 DMH 2 INV. IN= 265.00 6' (INFIL -B) R =266.20 INV. IN= 264.00 6- (INFIL -A) INV. IN= 262.50 12" (STG1) INV. OUT= 263.50 12' (DMH -1) INV. IN= 262.80 6" (INFIL -G) INV. OUT--262.50 IT (FE-1) FE -1 INV.= 261.90 STC-1 R =267.00 INV. OUT-- 269.00 6- (CB-2) INV. IN= 263.10 IT (DMH -1) INV. OUT= 263.10 12" (DMH 2) INFit -B INV. OUT= 1266.50 So (C134) INFIL -C iNV. OUT = x266.50 6' (DMH2) INFIL -D INV. OUT =270.00 6' (CB-1) SEWER R. M& INVERT SCHEDULE.- SMH -1'! BLDG. SEWER 1 R= 289.25 1 INV.= 285.65 BLDG. SEWER 2 SMH-2 1= 268.00 R= 274_6; (MATCH EXISTING) BLDG. SEWER 3 INV. IN= 264.50 1 =2 .fl0 BLDG. SEWER 4 1 ='267! SIGHT DISTANCE TABLE. DRIVEWAY NORTHERLY SIGHT DISTANCE SOUTHERLY SIGHT DISTANCE LOT 2 > 250' > 250' COMMON DRIVE > 250' 200'; LOT 3 > 250' 150; ALL SIGHT DISTANCES MEASURED WITHIN IS FROM THE EDGE OF EXISTING PAVEMENT. DEPTW IVE SUBDIVISIONPLAN Site Construction & Utilities Plan 311,33 & 35 CAR YA VENUE LEMNGTON, MASSACHtTSEM 0 bDDLESEX COUIITM PREPARED FOR ,1 SHELDON CORPORA TION SCALE. 1"=20t DATE• FEBRUARY 14, 24105 MERIDIAN ASSOCIATI S, INC. 98 HIGH STREET fig M1IX ST REST, SUffE 302 DANVERS, MASSACWSM-17S 01923 WPSTBOROUGH, MASSACHUSETTS 01581 TELEPHONE- (978)739 -9130 TELEPHONE: (508)871 -7030 3 SHEET No. 5OF9 PROJECTNo. 811