1-9700-63.GM CONTRACT DRAWINGS.pdf

PDF 10 MB Posted Mar 18, 2026

Attached to: Green Lane Park Parking Lot Expansion, Contract No. 9700-71. GL3
Solicitation number: Not on record
Issued by: Montgomery County, Pennsylvania

About this file

Written by GovTribe AI · Mar 23, 2026

Grist Mill Basin Conversions Contract Documents Summary

This file contains contract drawings and specifications prepared by CKS Engineers for Towamencin Township in Montgomery County, Pennsylvania, for the Grist Mill Basin Conversions project (Contract No. 9700-63.GM). The project involves improvements to two separate existing Township-owned stormwater facilities located within the Grist Mill residential development to provide water quality benefits to Towamencin Creek. Work includes the replacement of outlet culverts, modification of outlet structures, regrading of basins, removal and replacement of existing culverts (60 linear feet at the East Basin and 40 linear feet at the West Basin), installation of underdrains and cleanout systems, construction of riprap aprons, spillway protection with turf reinforcement matting, and comprehensive erosion and sediment control measures. The East Basin encompasses 0.88 acres of disturbance with 465 feet of length and 802 feet of width, while the West Basin covers 0.85 acres. The contract drawings include ten sheets detailing location maps, erosion and sediment control plans, existing features and demolition plans, grading and stabilization plans, and site stormwater notes and details. All contractors must contact the Pennsylvania One-Call System at 1-800-242-1776 at least 72 hours prior to excavation and notify the Township Engineer at least 48 hours in advance of work activities. The project requires compliance with PennDOT specifications, Towamencin Township ordinances, and Pennsylvania Department of Environmental Protection regulations.

Bids must include lump sum or unit prices and be accompanied by a certified check, bank draft, or bid bond issued by a surety company licensed in Pennsylvania for at least 10 percent of the total bid amount. The Pennsylvania Prevailing Wage Act applies to this contract as the estimated project cost exceeds $25,000, and all bidders and subcontractors must be PennDOT prequalified. All contractors and subcontractors are required to utilize the federal E-Verify Program to confirm employment eligibility. The contract requires performance, labor and materials, and maintenance bonds equal to 100 percent of the contract value, with final payment withheld at 10 percent of the total bid price until successful completion of all punch-list items. Liquidated damages of $975 per calendar day will be assessed for delays beyond the specified completion period. The project is partially funded through a Commonwealth of Pennsylvania Department of Transportation GLG grant program. No specific set-aside designations for disadvantaged enterprises were noted in the documentation. The Township reserves the right to reject any or all bids and waive minor informalities in the bidding process.

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Other files

File	Type	Posted
1-9700-71.GL3 CONTRACT DRAWINGS.pdf	PDF	Jul 27, 2026
2-9700-71.GL3 CONTRACT DOCUMENTS.pdf	PDF	Jul 27, 2026
7-Form of Proposal.pdf	PDF	Dec 1, 2025
9-Public Works Employment Verification Form.pdf	PDF	Dec 1, 2025
10-Worker Protection and Investment Certificate Form.pdf	PDF	Dec 1, 2025
8-Non-Collusion Affidavit of Prime Bidder.pdf	PDF	Dec 1, 2025
3-03 Item Quantities Per Intersection.pdf	PDF	Dec 1, 2025
4-04 Construction Narrative Combined.pdf	PDF	Dec 1, 2025
5-Contractors Qualification Statement.pdf	PDF	Dec 1, 2025
1-01(a-j) Traffic Signal Permit Plans.pdf	PDF	Dec 1, 2025
6-Form of Guaranty.pdf	PDF	Dec 1, 2025
11-05 Bid Document FINAL.pdf	PDF	Dec 1, 2025
2-02 Traffic Signal System Permit Plan.pdf	PDF	Dec 1, 2025

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465'

802'

EAST

BASIN

LOCATION

WEST

BASIN

LOCATION

PREPARED BY:

PREPARED FOR:

GRIST MILL BASIN CONVERSIONS

CONTRACT NO. 9700-63.GM

CKS

ENGINEERS

4259 W. Swamp Road, Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

TOWAMENCIN TOWNSHIP

AN ARRO CONSULTING COMPANY

NOTES:

THE LOCATION AND DEPTH OF ANY UTILITY LINES SHOWN HEREON ARE APPROXIMATE ONLY. ACTUAL

LOCATIONS AND DEPTHS SHALL BE FIELD VERIFIED BY THE CONTRACTOR PRIOR TO ANY

CONSTRUCTION.

CONTRACTOR IS RESPONSIBLE FOR CHECKING ALL DISTANCES, GRADES, QUANTITIES, LINES AND

ELEVATIONS AND NOTIFYING ENGINEER OF ANY DISCREPANCIES.

ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH PENNDOT SPECIFICATIONS, PUBLICATION 408, TOWAMENCIN TOWNSHIP ORDINANCES, LATEST EDITIONS AND THE PROJECT CONSTRUCTION

SPECIFICATIONS.

THE CONTRACTOR IS RESPONSIBLE FOR THE PROTECTION OF ALL UTILITY POLES, INCLUDING GUYS, IN CLOSE PROXIMITY TO THE CONSTRUCTION AREA. THE UTILITY POLES SHALL BE SUPPORTED AND

BRACED IN ACCORDANCE WITH METHODS RECOMMENDED AND APPROVED BY THE RESPECTIVE

UTILITY COMPANIES WHO SHALL BE NOTIFIED NO LESS THAN SEVEN (7) DAYS PRIOR TO THE START OF

CONSTRUCTION NEAR EFFECTED UTILITY POLE.

CONTRACTOR SHALL BE RESPONSIBLE FOR CLEARING, GRUBBING, PAVING, TOPSOILING, FERTILIZING

AND SEEDING OR OTHERWISE RESTORING ALL AREAS DISTURBED BY HIS ACTIVITIES,

CONTRACTOR SHALL BE RESPONSIBLE FOR PROTECTION AND MAINTENANCE OF TRAFFIC CONTROL AT ALL TIMES IN ACCORDANCE WITH THE REQUIREMENTS OF THE APPROPRIATE GOVERNMENTAL AGENCY

HAVING JURISDICTION.

IN ACCORDANCE WITH ACT 50, THE CONTRACTOR SHALL CONTACT ALL UTILITY COMPANIES

INDIVIDUALLY AND SHALL NOTIFY THE PENNSYLVANIA UTILITIES "ONE-CALL" SERVICE AT LEAST 72

HOURS PRIOR TO COMMENCEMENT OF ANY EXCAVATION.

ANY ITEMS DAMAGED AS A RESULT OF THE CONTRACTOR'S OPERATIONS (i.e. WALLS, PAVING, FENCES, ETC.) SHALL BE REPLACED IN KIND BY THE CONTRACTOR AT NO ADDITIONAL COST TO TOWAMENCIN

TOWNSHIP.

RIGHT-OF-WAY LINES, EASEMENTS AND PROPERTY BOUNDARY INFORMATION SHOWN HEREON HAS

BEEN ESTABLISHED GRAPHICALLY USING DEEDS AND PLANS OF RECORD AND IS APPROXIMATE.

CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE TOWNSHIP ENGINEER A MINIMUM OF 48

HOURS IN ADVANCE OF ANY WORK BEING PERFORMED ON THIS PROJECT.

CONTRACTOR SHALL BE RESPONSIBLE FOR EROSION AND SEDIMENTATION CONTROLS AS MAY BE

REQUIRED BY TOWAMENCIN TOWNSHIP, THE DEPARTMENT OF ENVIRONMENTAL PROTECTION AND THE

MONTGOMERY COUNTY CONSERVATION DISTRICT.

INSPECTION OF, OR FAILURE TO INSPECT ANY MATERIAL OR WORKMANSHIP BY STATE, COUNTY OR TOWNSHIP OFFICIALS SHALL IN NO WAY RELIEVE THE CONTRACTOR OF HIS RESPONSIBILITIES TO PERFORM THE WORK IN ACCORDANCE WITH THE APPLICABLE PLANS, SPECIFICATIONS AND LAWS.

CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTAINING UTILITY SERVICES (ELECTRIC, GAS, WATER AND SANITARY SEWERS, ETC.). ANY INTERRUPTION IN SERVICE, OR NECESSARY REPAIRS TO MAINTAIN

SERVICE, SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR.

NO MATERIAL SHALL BE PLACED OR ANY DISTURBANCE PERMITTED BEYOND THE LIMITS OF WORK WITHOUT THE WRITTEN PERMISSION OF THE PROPERTY OWNER DIRECTLY INVOLVED AND APPROVAL

OF THE TOWNSHIP.

THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE LOCATING AND MARKOUT OF ALL EXISTING

UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ALL PIPING AND APPURTENANCES TO LINE AND

GRADE AS INDICATED ON THE PLANS.

10.

11.

12.

13.

14.

15.

16.

17.

EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA)

GEOSPATIAL DATA PORTAL.

1. ACT 50

NOTICE

IT IS THE CONTRACTOR'S RESPONSIBILITY TO VERIFY ALL EXACT LOCATIONS AND

ELEVATIONS OF ALL UNDERGROUND FACILITIES AND STRUCTURES BEFORE THE

START OF CONSTRUCTION ON THIS PROJECT. THIS NOTICE APPLIES ON INFORMATION

SHOWN ON THIS PLAN AND ANY ASSOCIATED PLANS FOR THIS PROJECT INCLUDING

PLANS OF SAME PREPARED BY OTHERS, E.G. UTILITY COMPANY PLANS.

THE CONTRACTOR SHALL CONTACT ALL UTILITIES OR PRIVATE CONCERNS IN

COMPLIANCE WITH THE REQUIREMENTS OF P.L. 852, No. 287, DECEMBER 10, 1974 AS

AMENDED ON APRIL 28, 2018 BY ACT No. 50, 72 HOURS PRIOR TO ANY EXCAVATION BY

CALLING 800-242-1776 AND/OR TELEPHONE NUMBERS LISTED BELOW. UTILITIES OR

PRIVATE CONCERNS TO BE CONTACTED SHALL INCLUDE, BUT NOT BE LIMITED TO,

THE FOLLOWING:

VERIZON BUSINESS FORMERLY MCI

7000 WESTON PKWY

CARY, NC. 27513

ATTN. VICTOR WOOD

EMAIL: victor.s.wood@verizon.com

NORTH PENN WATER AUTHORITY

300 FORTY FOOT ROAD

LANSDALE, PA 19446

ATTN. STEVE FRETZ

EMAIL: SFRETZ@NPWA.ORG

PECO (AN EXCELON COMPANY) C/O USIC

450 S. HENDERSON ROAD, SUITE B

KING OF PRUSSIA, PA 19406

ATTN. NIKKIA SIMPKINS

EMAIL: nikkiasimpkins@usicllc.com

COMCAST

1004 CORNERSTONE BOULEVARD

DOWNINGTOWN, PA 19335

ATTN. JOHN CEDRICK SALVATIERRA

EMAIL: johncedricksalvatierra@comcast.com

TOWAMENCIN TOWNSHIP

1090 TROXEL ROAD

LANSDALE, PA 19446

ATTN. DAVID HILLMANTEL

EMAIL: dhillmantel@towamencin.org

UNDERGROUND UTILITY NOTE

LOCATIONS OF EXISTING UTILITIES SHOWN HEREON

ARE BASED ON INFORMATION RECEIVED FROM

FACILITY OWNERS FOLLOWING A CALL TO PA ONE

CALL SYSTEM, INC. COMPLETENESS OR ACCURACY

OF TYPE, SIZE, DEPTH, OR HORIZONTAL LOCATION OF

UTILITIES CANNOT BE GUARANTEED. CONTRACTORS

MUST VERIFY THE LOCATION AND DEPTH OF

UNDERGROUND UTILITIES BEFORE THE START OF

WORK BY NOTIFYING FACILITY OWNERS, THROUGH

THE PA ONE CALL SYSTEM (1-800-242-1776 OR 811),

NOT LESS THAN 3 BUSINESS DAYS NOR MORE THAN 10

BUSINESS DAYS IN ADVANCE OF BEGINNING

EXCAVATION OR DEMOLITION WORK PER THE

REQUIREMENTS OF PA ACTS 287 OF 1974, EFFECTIVE

OCTOBER 9, 2008, AS AMENDED

INDEX SHEET

DRAWING TITLE

DRAWING INDEX

SHEET NO.

GRADING & STABILIZATION PLAN - EAST BASIN 4 OF 10

EXISTING FEATURES & DEMO PLAN - EAST BASIN

EROSION & SEDIMENT CONTROL PLAN - EAST BASIN

EROSION & SEDIMENT CONTROL PLAN - WEST BASIN 5 OF 10

GRADING & STABILIZATION PLAN - WEST BASIN

EXISTING FEATURES & DEMO PLAN - WEST BASIN

EROSION & SEDIMENT CONTROL NOTES

9 OF 10EROSION & SEDIMENT CONTROL DETAILS

10 OF 10SITE STORMWATER NOTES & DETAILS

SERIAL NUMBERS: 20253241924 (EAST BASIN)

20253242328 (WEST BASIN)

(C0005018.00)

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NORTH PENN

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WATER AUTHORITY

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HEEBNER WAY

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WIEBEL WAY

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WELSH

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RD.

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ALLENTOWN RD.

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GRIST

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MILL

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DRIVE

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FORTY FOOT ROAD

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SPECHT PARK

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QUARRY ROAD

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REIFF ROAD

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TAPESTRY WAY

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FAMILY WORSHIP

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CENTER

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SNYDER ROAD

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ORVILLA

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SCHOOL

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INGLEWOOD

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RD.

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AVE.

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COLUMBIA

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CHERRY LA.

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WALNUT LA.

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WEIKEL RD.

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TROXEL RD.

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AMBER LA.

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OXFORD RD.

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COMPLEX

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MUNICIPAL

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TOWNSHIP

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ENCAMPMENT ROAD

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ALLENTOWN RD.

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DRINNON WAY

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MILITIA DR.

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TENNIS CIR.

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KEELER ROAD

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MUSKET CIR.

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FIELDSTONE WAY

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PICKWICK LN.

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HAMPTON WAY

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AVALON WAY

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TENNIS WAY

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SUSAN DR.

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BUCKBOARD WAY

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CARRIAGE WAY

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MORGANDALE

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DRIVE

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WOODLAWN DRIVE

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ORCHARD LN.

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WOODLAWN DRIVE

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BOYD AVE.

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WASHINGTON AVE.

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WAYNE AVE.

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WOODLAWN DRIVE

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WILLIAM PENN WAY

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KEELER ROAD

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MADISON WAY

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MICHEAL

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WAY

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TYLER WAY

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CHESWALD DR.

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DEAN DR.

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MAXWELL CT.

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VILLAGE WAY

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TROXEL RD.

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TROXEL RD.

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GRIST MILL PARK

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GAS PIPELINE

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T:\AUTOCAD\TOWAMENCIN TOWNSHIP\9700-63.GM\CAD\9700-63.GM DESIGN PLAN SHEETS.DWG

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SCALE: 1"=1000'

AutoCAD SHX Text As reprinted from the CKS Engineers, Inc. street map of Towamencin Township, Montgomery County, Pa.

AutoCAD SHX Text

LOCATION MAP

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LIST OF PUBLIC UTILITIES

AutoCAD SHX Text 1-800-242-1776

AutoCAD SHX Text A

AutoCAD SHX Text I

AutoCAD SHX Text N

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AutoCAD SHX Text C

AutoCAD SHX Text A

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AutoCAD SHX Text V

AutoCAD SHX Text Y

AutoCAD SHX Text N

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AutoCAD SHX Text P

AutoCAD SHX Text O

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AutoCAD SHX Text N

AutoCAD SHX Text T

AutoCAD SHX Text E

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AutoCAD SHX Text I

AutoCAD SHX Text N

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AutoCAD SHX Text M

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AutoCAD SHX Text G

AutoCAD SHX Text D

AutoCAD SHX Text I

AutoCAD SHX Text S

AutoCAD SHX Text L

AutoCAD SHX Text U

AutoCAD SHX Text O

AutoCAD SHX Text Y

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LOD

LOD LOD

LOD LOD LOD

LOD

12''CFS

12''CFS12''CFS

12''CFS

''C

12''CFS

''C

12''CFS

TPF

TPFTPFTPFTPFTPFTPF

TPF

TREE PROTECTION

FENCE (500 LF±)

COMPOST FILTER

SOCK (400 LF±)

ROCK CONSTRUCTION

ENTRANCE (600 SF±)

RIPRAP APRON 'E1'

R-5 (24 CY±)

RIPRAP APRON 'E0'

R-5 (18 CY±)

TPF

TPFTPFTPF

TPF

PUMPED WATER

FILTER BAG

LIMIT OF DISTURBANCE

(0.88 AC)

TOPSOIL

STOCKPILE

COMPOST FILTER

SOCK (60 LF±)

TREE PROTECTION

FENCE (180 LF±)

(To Remain)

(TBR)

REMOVE CMP CULVERT (60 LF),

REPLACING IMMEDIATELY WITH

NEW PIPE SECTIONS & BACKFILLING

(To Remain)

TEMP. INLET PROTECTION

ON GRATES

SUMP PIT

7 30

304303302301

296.5

5 30

PROVIDE TEMP SILT FENCE AND

ROCK FILTER OVER OPENINGS

SEE "OUTLET STRUCTURE

SEDIMENT PROTECTION" DETAIL

Existing Curb

Existing Edge of Pave

Existing Contour

Existing Storm Sewer

Existing Tree Line

Existing Water Main

Soil Type

Existing Utility Pole

Property Line

Legal Right-of-Way

Existing Street Tree

TPF TPF TPF Tree Protection Fence

LOD Limit of Earth Disturbance 12''CFS Compost Filter Sock

Inlet Filter Protection

Topsoil Stockpile

465'

802'

9700-63.GM12/15/25

Date:

Checked By:1" = 20'

Scale: Drawn By:

JE/MS

Plan No. Sheet No.

Rev. No.

E&S CONTROL PLAN (EAST BASIN)

Date Description

CKS

ENGINEERS

4259 W. Swamp Road Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

Towamencin Township Montgomery County, Pennsylvania

AN ARRO CONSULTING COMPANY

0 20 40 Feet1020

SCALE: 1" = 20'

GENERAL NOTES:

EAST BASIN

LOCATION

WEST BASIN

LOCATION

SOILS LIST

1. EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL

DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA

SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED

FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA) GEOSPATIAL DATA PORTAL.

2. RIGHT-OF-WAY LINE AND PROPERTY LINE INFORMATION SHOWN HEREON HAS BEEN ESTABLISHED

GRAPHICALLY USING DEEDS AND PLANS OF RECORD.

3. LOCATION OF EXISTING UTILITIES WERE OBTAINED FROM VARIOUS PLANS AND LIMITED FIELD

EXPLORATION. THEY ARE APPROXIMATE. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING

AND MARK OUT OF ALL EXISTING UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

GRIST MILL BASIN CONVERSIONS

TOWAMENCIN TOWNSHIP

C0005018.00

LOCATION MAP

Scale : 1" = 1,000'

LEGEND

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SPUR ROAD

AutoCAD SHX Text

AutoCAD SHX Text x 303.65

AutoCAD SHX Text x 308.90

AutoCAD SHX Text x 300.33

AutoCAD SHX Text N/L Towamencin Township Parid 53-00-03487-06-753-00-03487-06-7

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text Sign to remain (Non Mow Area)

AutoCAD SHX Text S

AutoCAD SHX Text

AutoCAD SHX Text Landscape Island

AutoCAD SHX Text Concrete Sidewalk

AutoCAD SHX Text Concrete Curb

AutoCAD SHX Text Legal Right-of-Way Line

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AutoCAD SHX Text S

AutoCAD SHX Text Landscape Bed

AutoCAD SHX Text

GRIST MILL DRIVE (TWP)

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WELSH ROAD (S.R. 0063)

AutoCAD SHX Text

AutoCAD SHX Text 305.42

AutoCAD SHX Text 304.37

AutoCAD SHX Text 42"x60" ECMP (60 LF @ 0.60%)

AutoCAD SHX Text S

AutoCAD SHX Text Outlet Pipe Inv. 294.25

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text RhB

AutoCAD SHX Text D

AutoCAD SHX Text 30"x30" Rect. Weir Inv. 297.43

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text 42"x60" CMP

AutoCAD SHX Text Double 'M' Inlet T.G. 308.64 Inv. 303.94

AutoCAD SHX Text Headwall #20 Inv. 293.00

AutoCAD SHX Text Type 'C' Inlet #10 T.G. 300.02 Inv. 295.42

AutoCAD SHX Text Type 'C' Inlet #17 T.G. 300.38 Inv. 296.88

AutoCAD SHX Text

15" CMP

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18" CMP

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15" CMP

AutoCAD SHX Text 33"x60" CMP

AutoCAD SHX Text @ 2.14%

AutoCAD SHX Text Conc. Endwall 'E1' T.W. 307.08 Inv. 303.38

AutoCAD SHX Text Concrete Box Outlet Structure

AutoCAD SHX Text 30"x30" Rect. Weir Inv. 297.04

AutoCAD SHX Text 2'x4' Grate T.G. 301.63

AutoCAD SHX Text 2'x4' Grate T.G. 301.84

AutoCAD SHX Text Conc. Endwall 'E0' Inv. 293.89

AutoCAD SHX Text CbA

AutoCAD SHX Text D

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WELSH

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RD.

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ALLENTOWN RD.

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GRIST

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MILL

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DRIVE

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ORVILLA

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RD.

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TROXEL RD.

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ENCAMPMENT ROAD

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ALLENTOWN RD.

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DRINNON WAY

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MILITIA DR.

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TENNIS CIR.

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KEELER ROAD

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MUSKET CIR.

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FIELDSTONE WAY

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PICKWICK LN.

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HAMPTON WAY

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AVALON WAY

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WILLIAM PENN WAY

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GAS PIPELINE

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T:\AUTOCAD\TOWAMENCIN TOWNSHIP\9700-63.GM\CAD\9700-63.GM DESIGN PLAN SHEETS.DWG

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NOTE:

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NO SOIL TESTING OR GEOTECHNICAL ANALYSIS OF THIS PROJECT HAS BEEN PERFORMED.

AutoCAD SHX Text RhB

AutoCAD SHX Text Reaville Silt Loam

AutoCAD SHX Text 3 - 8%

AutoCAD SHX Text SOILS AND SOILS CHARACTERISTICS SHOWN HAVE BEEN INTERPRETED FROM USDA, NRCS CUSTOM SOIL RESOURCE REPORT FOR MONTGOMERY COUNTY, PENNSYLVANIA, AN ELECTRONIC REPORT GENERATED BY NRCS WEB SOIL SURVEY.

AutoCAD SHX Text

MAP SYMBOL

AutoCAD SHX Text

SOIL SERIES

SLOPE

LOD

LOD LOD

LOD LOD LOD

LOD

12''CFS

12''CFS12''CFS

12''CFS

''C

12''CFS

''C

12''CFS

TPF

TPFTPFTPFTPFTPFTPF

TPF

TPFTPFTPF

TPF

(To Remain)

(TBR)

REMOVE CMP CULVERT (60 LF),

REPLACING IMMEDIATELY WITH

NEW PIPE SECTIONS & BACKFILLING

(To Remain)

Existing Curb

Existing Edge of Pave

Existing Contour

Existing Storm Sewer

Existing Tree Line

Existing Water Main

Soil Type

Existing Utility Pole

Property Line

Legal Right-of-Way

Existing Street Tree

465'

802'

Culvert Removal

Tree and Brush Removal

12/15/25

Date:

Checked By:1" = 20'

Scale: Drawn By:

JD/MS

Plan No. Sheet No.

Rev. No.

EXISTING FEATURES & DEMOLITION PLAN (EAST BASIN)

Date Description

CKS

ENGINEERS

4259 W. Swamp Road Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

Towamencin Township Montgomery County, Pennsylvania

AN ARRO CONSULTING COMPANY

0 20 40 Feet1020

SCALE: 1" = 20'

GENERAL NOTES:

1. EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS

CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL

DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA

SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED

FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA) GEOSPATIAL DATA PORTAL.

2. RIGHT-OF-WAY LINE AND PROPERTY LINE INFORMATION SHOWN HEREON HAS BEEN ESTABLISHED

GRAPHICALLY USING DEEDS AND PLANS OF RECORD.

3. LOCATION OF EXISTING UTILITIES WERE OBTAINED FROM VARIOUS PLANS AND LIMITED FIELD

EXPLORATION. THEY ARE APPROXIMATE. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING

AND MARK OUT OF ALL EXISTING UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

GRIST MILL BASIN CONVERSIONS

TOWAMENCIN TOWNSHIP

SOILS LIST

NOTE:

NO SOIL TESTING OR GEOTECHNICAL ANALYSIS OF THIS PROJECT HAS BEEN

PERFORMED.

RhB Reaville Silt Loam 3 - 8%

SOILS AND SOILS CHARACTERISTICS SHOWN HAVE BEEN INTERPRETED FROM USDA,

NRCS CUSTOM SOIL RESOURCE REPORT FOR MONTGOMERY COUNTY, PENNSYLVANIA,

AN ELECTRONIC REPORT GENERATED BY NRCS WEB SOIL SURVEY.

MAP SYMBOL SOIL SERIES SLOPE

9700-63.GM 03 OF 10

C0005018.00

EAST BASIN

LOCATION

WEST BASIN

LOCATION

LOCATION MAP

Scale : 1" = 1,000'

LEGEND

AutoCAD SHX Text

SPUR ROAD

AutoCAD SHX Text

AutoCAD SHX Text x 303.65

AutoCAD SHX Text x 308.90

AutoCAD SHX Text x 300.33

AutoCAD SHX Text N/L Towamencin Township Parid 53-00-03487-06-753-00-03487-06-7

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text Sign to remain (Non Mow Area)

AutoCAD SHX Text S

AutoCAD SHX Text

AutoCAD SHX Text Landscape Island

AutoCAD SHX Text Concrete Sidewalk

AutoCAD SHX Text Concrete Curb

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text

AutoCAD SHX Text S

AutoCAD SHX Text Landscape Bed

AutoCAD SHX Text

GRIST MILL DRIVE (TWP)

AutoCAD SHX Text

WELSH ROAD (S.R. 0063)

AutoCAD SHX Text

AutoCAD SHX Text 305.42

AutoCAD SHX Text 304.37

AutoCAD SHX Text 42"x60" ECMP (60 LF @ 0.60%)

AutoCAD SHX Text S

AutoCAD SHX Text Outlet Pipe Inv. 294.25

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text RhB

AutoCAD SHX Text D

AutoCAD SHX Text 30"x30" Rect. Weir Inv. 297.43

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text 42"x60" CMP

AutoCAD SHX Text Double 'M' Inlet T.G. 308.64 Inv. 303.94

AutoCAD SHX Text Headwall #20 Inv. 293.00

AutoCAD SHX Text Type 'C' Inlet #10 T.G. 300.02 Inv. 295.42

AutoCAD SHX Text Type 'C' Inlet #17 T.G. 300.38 Inv. 296.88

AutoCAD SHX Text

15" CMP

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text

15" CMP

AutoCAD SHX Text 33"x60" CMP

AutoCAD SHX Text @ 2.14%

AutoCAD SHX Text Conc. Endwall 'E1' T.W. 307.08 Inv. 303.38

AutoCAD SHX Text Concrete Box Outlet Structure

AutoCAD SHX Text 30"x30" Rect. Weir Inv. 297.04

AutoCAD SHX Text 2'x4' Grate T.G. 301.63

AutoCAD SHX Text 2'x4' Grate T.G. 301.84

AutoCAD SHX Text Conc. Endwall 'E0' Inv. 293.89

AutoCAD SHX Text CbA

AutoCAD SHX Text D

AutoCAD SHX Text

WELSH

AutoCAD SHX Text

RD.

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

GRIST

AutoCAD SHX Text

MILL

AutoCAD SHX Text

DRIVE

AutoCAD SHX Text

ORVILLA

AutoCAD SHX Text

RD.

AutoCAD SHX Text

TROXEL RD.

AutoCAD SHX Text

ENCAMPMENT ROAD

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

DRINNON WAY

AutoCAD SHX Text

MILITIA DR.

AutoCAD SHX Text

TENNIS CIR.

AutoCAD SHX Text

KEELER ROAD

AutoCAD SHX Text

MUSKET CIR.

AutoCAD SHX Text

FIELDSTONE WAY

AutoCAD SHX Text

PICKWICK LN.

AutoCAD SHX Text

HAMPTON WAY

AutoCAD SHX Text

AVALON WAY

AutoCAD SHX Text

WILLIAM PENN WAY

AutoCAD SHX Text

GAS PIPELINE

T:\AUTOCAD\TOWAMENCIN TOWNSHIP\9700-63.GM\CAD\9700-63.GM DESIGN PLAN SHEETS.DWG

4"Ø PERF HDPE

UNDERDRAIN

(220 LF @ 2%)

CLEANOUT

INV 300.00

CLEANOUT

INV 300.00

42"Ø O-RING RCP

(60 LF @ 0.60%)

TOP OF BERM

ELEV 305.00

TOP OF BERM 305.00

TOP OF BERM 307.00

EMERGENCY

SPILLWAY

ELEV 303.08

C350 TURF

REINFORCEMENT

MATTING (160 SY±)

RIPRAP APRON 'E1'

R-5 (24 CY±)

RIPRAP APRON 'E0'

R-5 (18 CY±)

STANDARD LAWN

SEED MIX

(270 SY±)

SAND FILTER (200 SF±)

SEE DETAIL

4"Ø PERF. HDPE

UNDERDRAIN

(120 LF @ 0.5%)

ANTI-SEEP

COLLAR

6"Ø PERF. HDPE

UNDERDRAIN

(60 LF @ 0%)

OUTLET STRUCTURE PROTECTIONS

TO BE REMOVED UPON

ACHIEVEMENT OF STABILIZATION

ERNMX-126 (OAE)

BASIN FLOOR MIX

(450 SY±)

ERNMX-126 (OAE)

BASIN FLOOR MIX

(700 SY±)

ERNMX-181 (OAE)

NATIVE STEEP SLOPE MIX

(2,750 SY±)

CLEANOUT

INV 299.40

GROUT/SEAL SIDES

OF EX OPENING

CORE-DRILL NEW OPENING

FOR NEW 4"Ø U-DRAIN

INV 295.00

CLEANOUT

INV 300.00

CLEANOUT

INV 299.25

6"Ø HDPE

(60 LF @ 1.25%)

RIVER ROCK

(0.5 CY±)

RIVER ROCK

(1.0 CY±)

S75 MATTING (OAE)

(1,530 SY±)

7 30

304303302301

296.5

5 30

INSTALL NEW

EDUCATIONAL SIGNAGE

(SEE DETAIL SHEET)

S75BN EROSION

CONTROL BLANKET

(400 SY±)

S75BN EROSION

CONTROL BLANKET

(1,130 SY±)

465'

802'

Existing Curb

Existing Edge of Pave

Existing Contour

Existing Storm Sewer

Existing Tree Line

Existing Water Main

Soil Type

Existing Utility Pole

Property Line

Legal Right-of-Way

Existing Street Tree

Proposed Grading Contour

Proposed Outlet Culvert

Proposed Underdrain

Proposed Riprap Apron

Spillway Matting (C350)

Basin Bottom Seeding

Slope Seeding & ECB (S75BN)

Standard Lawn Seeding

12/15/25

Date:

Checked By:1" = 20'

Scale: Drawn By:

JE/MS

Plan No. Sheet No.

Rev. No.

GRADING & STABILIZATION PLAN (EAST BASIN)

Date Description

CKS

ENGINEERS

4259 W. Swamp Road Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

Towamencin Township Montgomery County, Pennsylvania

AN ARRO CONSULTING COMPANY

0 20 40 Feet1020

SCALE: 1" = 20'

GENERAL NOTES:

LOCATION MAP

Scale : 1" = 1,000'

LEGEND

1. EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL

DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA

SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED

FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA) GEOSPATIAL DATA PORTAL.

2. RIGHT-OF-WAY LINE AND PROPERTY LINE INFORMATION SHOWN HEREON HAS BEEN ESTABLISHED

GRAPHICALLY USING DEEDS AND PLANS OF RECORD.

3. LOCATION OF EXISTING UTILITIES WERE OBTAINED FROM VARIOUS PLANS AND LIMITED FIELD

EXPLORATION. THEY ARE APPROXIMATE. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING

AND MARK OUT OF ALL EXISTING UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

GRIST MILL BASIN CONVERSIONS

TOWAMENCIN TOWNSHIP

SOILS LIST

NOTE:

NO SOIL TESTING OR GEOTECHNICAL ANALYSIS OF THIS PROJECT HAS BEEN PERFORMED.

RhB Reaville Silt Loam 3 - 8%

SOILS AND SOILS CHARACTERISTICS SHOWN HAVE BEEN INTERPRETED FROM USDA,

NRCS CUSTOM SOIL RESOURCE REPORT FOR MONTGOMERY COUNTY, PENNSYLVANIA,

AN ELECTRONIC REPORT GENERATED BY NRCS WEB SOIL SURVEY.

MAP SYMBOL SOIL SERIES SLOPE

9700-63.GM 04 OF 10

C0005018.00

EAST BASIN

LOCATION

WEST BASIN

LOCATION

AutoCAD SHX Text

SPUR ROAD

AutoCAD SHX Text

AutoCAD SHX Text x 303.65

AutoCAD SHX Text x 308.90

AutoCAD SHX Text x 300.33

AutoCAD SHX Text N/L Towamencin Township Parid 53-00-03487-06-753-00-03487-06-7

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text Sign to remain (Non Mow Area)

AutoCAD SHX Text S

AutoCAD SHX Text

AutoCAD SHX Text Landscape Island

AutoCAD SHX Text Concrete Sidewalk

AutoCAD SHX Text Concrete Curb

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text

AutoCAD SHX Text S

AutoCAD SHX Text Landscape Bed

AutoCAD SHX Text

GRIST MILL DRIVE (TWP)

AutoCAD SHX Text

WELSH ROAD (S.R. 0063)

AutoCAD SHX Text

AutoCAD SHX Text 305.42

AutoCAD SHX Text 304.37

AutoCAD SHX Text S

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text RhB

AutoCAD SHX Text D

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text 42"x60" CMP

AutoCAD SHX Text Double 'M' Inlet T.G. 308.64 Inv. 303.94

AutoCAD SHX Text Headwall #20 Inv. 293.00

AutoCAD SHX Text Type 'C' Inlet #10 T.G. 300.02 Inv. 295.42

AutoCAD SHX Text Type 'C' Inlet #17 T.G. 300.38 Inv. 296.88

AutoCAD SHX Text

15" CMP

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text

15" CMP

AutoCAD SHX Text 33"x60" CMP

AutoCAD SHX Text @ 2.14%

AutoCAD SHX Text Conc. Endwall 'E1' T.W. 307.08 Inv. 303.38

AutoCAD SHX Text Concrete Box Outlet Structure

AutoCAD SHX Text 30"x30" Rect. Weir Inv. 297.04

AutoCAD SHX Text 2'x4' Grate T.G. 301.63

AutoCAD SHX Text 2'x4' Grate T.G. 301.84

AutoCAD SHX Text Conc. Endwall 'E0' Inv. 293.89

AutoCAD SHX Text

WELSH

AutoCAD SHX Text

RD.

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

GRIST

AutoCAD SHX Text

MILL

AutoCAD SHX Text

DRIVE

AutoCAD SHX Text

ORVILLA

AutoCAD SHX Text

RD.

AutoCAD SHX Text

TROXEL RD.

AutoCAD SHX Text

ENCAMPMENT ROAD

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

DRINNON WAY

AutoCAD SHX Text

MILITIA DR.

AutoCAD SHX Text

TENNIS CIR.

AutoCAD SHX Text

KEELER ROAD

AutoCAD SHX Text

MUSKET CIR.

AutoCAD SHX Text

FIELDSTONE WAY

AutoCAD SHX Text

PICKWICK LN.

AutoCAD SHX Text

HAMPTON WAY

AutoCAD SHX Text

AVALON WAY

AutoCAD SHX Text

WILLIAM PENN WAY

AutoCAD SHX Text

GAS PIPELINE

AutoCAD SHX Text CbA

AutoCAD SHX Text D

12''CFS

''C

12''CFS

TPF

TPFTPF

TPF

TPFTPF

TPF

ROCK CONSTRUCTION

ENTRANCE (600 SF±)

LIMIT OF DISTURBANCE

(0.85 AC)

12''CFS

12''C

12''CFS

LOD

12" COMPOST

FILTER SOCK

(400 LF±)

RIPRAP APRON 'W0'

R-4 (7 CY±)

PUMPED WATER

FILTER BAG

TOPSOIL

STOCKPILE

RIPRAP APRON 'W1'

R-4 (3± CY)

TREE PROTECTION

FENCE (500 LF±)

TREE PROTECTION

FENCE (200 LF±)

PROVIDE TEMP SILT FENCE AND

ROCK FILTER OVER OPENINGS

SEE "OUTLET STRUCTURE

SEDIMENT PROTECTION" DETAIL

TEMP. INLET

PROTECTION

ON GRATE

LOD

LODLOD

LOD

CORE-DRILL

ORIFICE OPENINGS

SUMP PIT

(To Remain)

REMOVE CMP CULVERT (40 LF),

REPLACING IMMEDIATELY WITH

NEW PIPE SECTIONS & BACKFILLING

314.5

320.5

465'

802'

Existing Curb

Existing Edge of Pave

Existing Contour

Existing Storm Sewer

Existing Tree Line

Existing Water Main

Soil Type

Existing Utility Pole

Property Line

Legal Right-of-Way

Existing Street Tree

TPF TPF TPF Tree Protection Fence

LOD Limit of Earth Disturbance 12''CFS Compost Filter Sock

Inlet Filter Protection

Topsoil Stockpile

12/15/25

Date:

Checked By:1" = 20'

Scale: Drawn By:

JE/MS

Plan No. Sheet No.

Rev. No.

E&S CONTROL PLAN (WEST BASIN)

Date Description

GRIST MILL BASIN CONVERSIONS

TOWAMENCIN TOWNSHIPCKS

ENGINEERS

4259 W. Swamp Road Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

Towamencin Township Montgomery County, Pennsylvania

AN ARRO CONSULTING COMPANY

0 20 40 Feet1020

SCALE: 1" = 20'

GENERAL NOTES:

1. EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS

CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL

DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA

SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED

FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA) GEOSPATIAL DATA PORTAL.

2. RIGHT-OF-WAY LINE AND PROPERTY LINE INFORMATION SHOWN HEREON HAS BEEN ESTABLISHED

GRAPHICALLY USING DEEDS AND PLANS OF RECORD.

3. LOCATION OF EXISTING UTILITIES WERE OBTAINED FROM VARIOUS PLANS AND LIMITED FIELD

EXPLORATION. THEY ARE APPROXIMATE. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING

AND MARK OUT OF ALL EXISTING UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

SOILS LIST

9700-63.GM 05 OF 10

C0005018.00

EAST BASIN

LOCATION

WEST BASIN

LOCATION

LOCATION MAP

Scale : 1" = 1,000'

LEGEND

AutoCAD SHX Text 318.87

AutoCAD SHX Text N/L James Richard & Tiffany Frances Cole Parid 53-00-08495-56-9

AutoCAD SHX Text N/L Charles J. Morreale Parid 53-00-08495-64-1

AutoCAD SHX Text N/L Towamencin Township Parid 53-00-03487-16-653-00-03487-16-6

AutoCAD SHX Text N/L William James & Erin Kathleen Mcateer Parid 53-00-04945-11-4

AutoCAD SHX Text N/L Michael J. Sr. & Susan E. Gensch Parid 53-00-04945-12-353-00-04945-12-3

AutoCAD SHX Text N/L Linda J. Trout Parid 53-00-04945-13-253-00-04945-13-2

AutoCAD SHX Text N/L Subir & Sharmila Gupta Parid 53-00-04945-14-1

AutoCAD SHX Text

AutoCAD SHX Text 320.56

AutoCAD SHX Text 320.64

AutoCAD SHX Text 314.64

AutoCAD SHX Text 322.86

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text Swale CL

AutoCAD SHX Text Concrete Curb

AutoCAD SHX Text

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text Concrete Sidewalk

AutoCAD SHX Text 24"x36" CMP (40 LF @ 1.6%)

AutoCAD SHX Text Top of Berm 320.5

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text PeB

AutoCAD SHX Text B

AutoCAD SHX Text

GRIST MILL DRIVE

AutoCAD SHX Text Endwall 'W0' T.W. 316.85 Inv. 313.64

AutoCAD SHX Text

AutoCAD SHX Text Conc. Endwall T.W. 322.30 Inv. 319.96

AutoCAD SHX Text Type 'M' Inlet T.G. 322.81 Inv. 320.46

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text Outlet Structure T.G. 318.59 Orifice 4"x4" 314.29 Inv. Out 314.29

AutoCAD SHX Text

WELSH

AutoCAD SHX Text

RD.

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

GRIST

AutoCAD SHX Text

MILL

AutoCAD SHX Text

DRIVE

AutoCAD SHX Text

ORVILLA

AutoCAD SHX Text

RD.

AutoCAD SHX Text

TROXEL RD.

AutoCAD SHX Text

ENCAMPMENT ROAD

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

DRINNON WAY

AutoCAD SHX Text

MILITIA DR.

AutoCAD SHX Text

TENNIS CIR.

AutoCAD SHX Text

KEELER ROAD

AutoCAD SHX Text

MUSKET CIR.

AutoCAD SHX Text

FIELDSTONE WAY

AutoCAD SHX Text

PICKWICK LN.

AutoCAD SHX Text

HAMPTON WAY

AutoCAD SHX Text

AVALON WAY

AutoCAD SHX Text

WILLIAM PENN WAY

AutoCAD SHX Text

GAS PIPELINE

AutoCAD SHX Text CbA

AutoCAD SHX Text D

AutoCAD SHX Text

T:\AUTOCAD\TOWAMENCIN TOWNSHIP\9700-63.GM\CAD\9700-63.GM DESIGN PLAN SHEETS.DWG

AutoCAD SHX Text

NOTE:

AutoCAD SHX Text

NO SOIL TESTING OR GEOTECHNICAL ANALYSIS OF THIS PROJECT HAS BEEN PERFORMED.

AutoCAD SHX Text PeB

AutoCAD SHX Text Penn Silt Loam

AutoCAD SHX Text 3 - 8%

AutoCAD SHX Text

MAP SYMBOL

AutoCAD SHX Text

SOIL SERIES

12''CFS

''C

12''CFS

TPF

TPFTPF

TPF

TPFTPF

TPF

12''CFS

12''C

12''CFS

LOD

LODLOD

LOD

(To Remain)

REMOVE CMP CULVERT (40 LF),

REPLACING IMMEDIATELY WITH

NEW PIPE SECTIONS & BACKFILLING

465'

802'

Existing Curb

Existing Edge of Pave

Existing Contour

Existing Storm Sewer

Existing Tree Line

Existing Water Main

Soil Type

Existing Utility Pole

Property Line

Legal Right-of-Way

Existing Street Tree

Culvert Removal

Tree and Brush Removal

12/15/25

Date:

Checked By:1" = 20'

Scale: Drawn By:

JD/MS

Plan No. Sheet No.

Rev. No.

EXISTING FEATURES & DEMOLITION PLAN (WEST BASIN)

Date Description

CKS

ENGINEERS

4259 W. Swamp Road Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

Towamencin Township Montgomery County, Pennsylvania

AN ARRO CONSULTING COMPANY

0 20 40 Feet1020

SCALE: 1" = 20'

GENERAL NOTES:

1. EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS

CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL

DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA

SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED

FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA) GEOSPATIAL DATA PORTAL.

2. RIGHT-OF-WAY LINE AND PROPERTY LINE INFORMATION SHOWN HEREON HAS BEEN ESTABLISHED

GRAPHICALLY USING DEEDS AND PLANS OF RECORD.

3. LOCATION OF EXISTING UTILITIES WERE OBTAINED FROM VARIOUS PLANS AND LIMITED FIELD

EXPLORATION. THEY ARE APPROXIMATE. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING

AND MARK OUT OF ALL EXISTING UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

GRIST MILL BASIN CONVERSIONS

TOWAMENCIN TOWNSHIP

SOILS LIST

9700-63.GM 06 OF 10

C0005018.00

EAST BASIN

LOCATION

WEST BASIN

LOCATION

LOCATION MAP

Scale : 1" = 1,000'

LEGEND

AutoCAD SHX Text 318.87

AutoCAD SHX Text N/L James Richard & Tiffany Frances Cole Parid 53-00-08495-56-9

AutoCAD SHX Text N/L Charles J. Morreale Parid 53-00-08495-64-1

AutoCAD SHX Text N/L Towamencin Township Parid 53-00-03487-16-653-00-03487-16-6

AutoCAD SHX Text N/L William James & Erin Kathleen Mcateer Parid 53-00-04945-11-4

AutoCAD SHX Text N/L Michael J. Sr. & Susan E. Gensch Parid 53-00-04945-12-353-00-04945-12-3

AutoCAD SHX Text N/L Linda J. Trout Parid 53-00-04945-13-253-00-04945-13-2

AutoCAD SHX Text N/L Subir & Sharmila Gupta Parid 53-00-04945-14-1

AutoCAD SHX Text

AutoCAD SHX Text 320.56

AutoCAD SHX Text 320.64

AutoCAD SHX Text 314.64

AutoCAD SHX Text 322.86

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text Swale CL

AutoCAD SHX Text Concrete Curb

AutoCAD SHX Text

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text Concrete Sidewalk

AutoCAD SHX Text 24"x36" CMP (40 LF @ 1.6%)

AutoCAD SHX Text Top of Berm 320.5

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text PeB

AutoCAD SHX Text B

AutoCAD SHX Text

GRIST MILL DRIVE

AutoCAD SHX Text Endwall 'W0' T.W. 316.85 Inv. 313.64

AutoCAD SHX Text

AutoCAD SHX Text Conc. Endwall T.W. 322.30 Inv. 319.96

AutoCAD SHX Text Type 'M' Inlet T.G. 322.81 Inv. 320.46

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text Outlet Structure T.G. 318.59 Orifice 4"x4" 314.29 Inv. Out 314.29

AutoCAD SHX Text

WELSH

AutoCAD SHX Text

RD.

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

GRIST

AutoCAD SHX Text

MILL

AutoCAD SHX Text

DRIVE

AutoCAD SHX Text

ORVILLA

AutoCAD SHX Text

RD.

AutoCAD SHX Text

TROXEL RD.

AutoCAD SHX Text

ENCAMPMENT ROAD

AutoCAD SHX Text

ALLENTOWN RD.

AutoCAD SHX Text

DRINNON WAY

AutoCAD SHX Text

MILITIA DR.

AutoCAD SHX Text

TENNIS CIR.

AutoCAD SHX Text

KEELER ROAD

AutoCAD SHX Text

MUSKET CIR.

AutoCAD SHX Text

FIELDSTONE WAY

AutoCAD SHX Text

PICKWICK LN.

AutoCAD SHX Text

HAMPTON WAY

AutoCAD SHX Text

AVALON WAY

AutoCAD SHX Text

WILLIAM PENN WAY

AutoCAD SHX Text

GAS PIPELINE

AutoCAD SHX Text CbA

AutoCAD SHX Text D

AutoCAD SHX Text

T:\AUTOCAD\TOWAMENCIN TOWNSHIP\9700-63.GM\CAD\9700-63.GM DESIGN PLAN SHEETS.DWG

AutoCAD SHX Text

NOTE:

AutoCAD SHX Text

NO SOIL TESTING OR GEOTECHNICAL ANALYSIS OF THIS PROJECT HAS BEEN PERFORMED.

AutoCAD SHX Text PeB

AutoCAD SHX Text Penn Silt Loam

AutoCAD SHX Text 3 - 8%

AutoCAD SHX Text

MAP SYMBOL

AutoCAD SHX Text

SOIL SERIES

CLEANOUT

INV 316.00

6"Ø PERF. HDPE

UNDERDRAIN

(40 LF @ 0%)

4"Ø PERF. HDPE

UNDERDRAIN

(100 LF @ 0.5%)

C350 TURF

REINFORCEMENT

MATTING (100 SY±)

ANTI-SEEP COLLAR

CLEANOUT

INV 314.83

INV 316.00

6"Ø HDPE

(100 LF @ 0.50%)

CLEANOUT

INV 316.50

CLEANOUT

INV 316.50

4"Ø PERF. HDPE

UNDERDRAIN

(60 LF @ 0%)

SAND FILTER

(80 SF±)

SEE DETAIL

ERNMX-126 (OAE)

BASIN FLOOR MIX

(360 SY±)

ERNMX-126 (OAE)

BASIN FLOOR MIX

(1,440 SY±)

ERNMX-181 (OAE)

NATIVE STEEP SLOPE MIX

(1,580 SY±)

STANDARD LAWN

SEED MIX

(725 SY±)

CORE-DRILL NEW OPENING

FOR NEW 4"Ø U-DRAIN

INV 314.33

RIVER ROCK

(0.5 CY±)

RIVER ROCK

(0.5 CY±)

CLEANOUT

INV 314.58

4"Ø PERF. HDPE

UNDERDRAIN

(50 LF @ 0.5%) GROUT/SEAL SIDES

OF EX OPENING

S75BN EROSION

CONTROL BLANKET

(325 SY±)

314.5

EMERGENCY

SPILLWAY

ELEV 319.25

24"Ø O-RING RCP

(40 LF @ 1.6%)

TOP OF BERM

ELEV 320.50

TOP OF BERM

ELEV 320.50

320.5

INSTALL NEW

EDUCATIONAL SIGNAGE

(SEE DETAIL SHEET)

465'

802'

Existing Curb

Existing Edge of Pave

Existing Contour

Existing Storm Sewer

Existing Tree Line

Existing Water Main

Soil Type

Existing Utility Pole

Property Line

Legal Right-of-Way

Existing Street Tree

Proposed Grading Contour

Proposed Outlet Culvert

Proposed Underdrain

Proposed Riprap Apron

Spillway Matting (C350)

Basin Bottom Seeding

Slope Seeding & ECB (S75BN)

Standard Lawn Seeding

12/15/25

Date:

Checked By:1" = 20'

Scale: Drawn By:

Plan No. Sheet No.

Rev. No.

GRADING & STABILIZATION PLAN (WEST BASIN)

Date Description

CKS

ENGINEERS

4259 W. Swamp Road Suite 410 Doylestown, PA 18902 www.cksengineers.com 215.340.0600

Towamencin Township Montgomery County, Pennsylvania

AN ARRO CONSULTING COMPANY

0 20 40 Feet1020

SCALE: 1" = 20'

GENERAL NOTES:

1. EXISTING TOPOGRAPHIC INFORMATION SHOWN HEREON IS BASED UPON LIMITED FIELD SURVEYS

CONDUCTED BY CKS ENGINEERS, INC. DURING THE MONTHS OF MARCH AND APRIL, 2024. VERTICAL

DATUM BASED ON NAVD 88 GEOID12B DATUM AND HORIZONTAL DATUM BASED ON NAD83 PA

SOUTH STATE PLAN DATUM. ADDITIONAL AERIAL, LIDAR AND ELEVATION DATA WAS OBTAINED

FROM THE PENNSYLVANIA SPATIAL DATA ACCESS (PASDA) GEOSPATIAL DATA PORTAL.

2. RIGHT-OF-WAY LINE AND PROPERTY LINE INFORMATION SHOWN HEREON HAS BEEN ESTABLISHED

GRAPHICALLY USING DEEDS AND PLANS OF RECORD.

3. LOCATION OF EXISTING UTILITIES WERE OBTAINED FROM VARIOUS PLANS AND LIMITED FIELD

EXPLORATION. THEY ARE APPROXIMATE. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING

AND MARK OUT OF ALL EXISTING UTILITIES IN THE FIELD PRIOR TO COMMENCING WORK.

GRIST MILL BASIN CONVERSIONS

TOWAMENCIN TOWNSHIP

SOILS LIST

NOTE:

NO SOIL TESTING OR GEOTECHNICAL ANALYSIS OF THIS PROJECT HAS BEEN

PERFORMED.

PeB Penn Silt Loam 3 - 8%

SOILS AND SOILS CHARACTERISTICS SHOWN HAVE BEEN INTERPRETED FROM USDA,

NRCS CUSTOM SOIL RESOURCE REPORT FOR MONTGOMERY COUNTY, PENNSYLVANIA,

AN ELECTRONIC REPORT GENERATED BY NRCS WEB SOIL SURVEY.

MAP SYMBOL SOIL SERIES SLOPE

EAST BASIN

LOCATION

WEST BASIN

LOCATION

LOCATION MAP

Scale : 1" = 1,000'

LEGEND

9700-63.GM 07 OF 10

C0005018.00

AutoCAD SHX Text 318.87

AutoCAD SHX Text N/L James Richard & Tiffany Frances Cole Parid 53-00-08495-56-9

AutoCAD SHX Text N/L Charles J. Morreale Parid 53-00-08495-64-1

AutoCAD SHX Text N/L Towamencin Township Parid 53-00-03487-16-653-00-03487-16-6

AutoCAD SHX Text N/L William James & Erin Kathleen Mcateer Parid 53-00-04945-11-4

AutoCAD SHX Text N/L Michael J. Sr. & Susan E. Gensch Parid 53-00-04945-12-353-00-04945-12-3

AutoCAD SHX Text N/L Linda J. Trout Parid 53-00-04945-13-253-00-04945-13-2

AutoCAD SHX Text N/L Subir & Sharmila Gupta Parid 53-00-04945-14-1

AutoCAD SHX Text

AutoCAD SHX Text 320.56

AutoCAD SHX Text 320.64

AutoCAD SHX Text 314.64

AutoCAD SHX Text 322.86

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text Swale CL

AutoCAD SHX Text Concrete Curb

AutoCAD SHX Text

AutoCAD SHX Text Legal Right-of-Way Line

AutoCAD SHX Text Concrete Sidewalk

AutoCAD SHX Text Mature Trees

AutoCAD SHX Text PeB

AutoCAD SHX Text B

AutoCAD SHX Text

GRIST MILL DRIVE

AutoCAD SHX Text Endwall 'W0' T.W. 316.85 Inv. 313.64

AutoCAD SHX Text

AutoCAD SHX Text Conc. Endwall T.W. 322.30 Inv. 319.96

AutoCAD SHX Text Type 'M' Inlet T.G. 322.81 Inv. 320.46

AutoCAD SHX Text

18" CMP

AutoCAD SHX Text Outlet Structure T.G. 318.59 Orifice 4"x4" 314.29 Inv. Out 314.29

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WELSH

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RD.

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ALLENTOWN RD.

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GRIST

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MILL

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DRIVE

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ORVILLA

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RD.

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TROXEL RD.

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ENCAMPMENT ROAD

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ALLENTOWN RD.

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DRINNON WAY

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MILITIA DR.

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TENNIS CIR.

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KEELER ROAD

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MUSKET CIR.

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FIELDSTONE WAY

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PICKWICK LN.

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HAMPTON WAY

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AVALON WAY

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WILLIAM PENN WAY

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GAS PIPELINE

AutoCAD SHX Text CbA

AutoCAD SHX Text D

POTENTIAL SOIL LIMITATIONS AND RESOLUTIONS

EROSION AND SEDIMENTATION CONTROL

CONSTRUCTION SEQUENCE

1. THE LAND OWNER, ALL APPROPRIATE MUNICIPAL OFFICIALS, CONTRACTOR AND LICENSED

PROFESSIONAL ENGINEER WILL MEET ON THE SITE FOR A PRE-CONSTRUCTION

CONFERENCE AT LEAST 7 DAYS PRIOR TO THE START OF ANY EARTH DISTURBANCE

ACTIVITIES.

2. CONTRACTOR MUST VERIFY LOCATION AND DEPTH OF ALL UNDERGROUND FACILITIES

PRIOR TO START OF WORK BY CONTACTING THE PA ONE CALL SYSTEM AT 1-800-242-1776.

3. CONTRACTOR MUST CONTACT TOWAMENCIN TOWNSHIP (215-368-7602) AND

TOWNSHIP ENGINEER (215-340-0600) AT LEAST 3 DAYS PRIOR TO COMMENCEMENT OF

EARTH WORK ACTIVITIES.

4. LIMITS OF EARTH DISTURBANCE AND ENVIRONMENTALLY SENSITIVE AREAS MUST BE

CLEARLY MARKED IN THE FIELD PRIOR TO CONSTRUCTION.

5. ALL EARTH DISTURBANCE ACTIVITIES SHALL PROCEED IN ACCORDANCE WITH THE

FOLLOWING SEQUENCE. EACH STAGE SHALL BE COMPLETED BEFORE THE FOLLOWING

STAGE IS INITIATED (UNLESS OTHERWISE NOTED). CLEARING AND GRUBBING SHALL BE

LIMITED TO THOSE AREAS AS DESCRIBED IN EACH STAGE.

6. INSTALL THE TEMPORARY STONE CONSTRUCTION ENTRANCE/TIRE CLEANER IN

ACCORDANCE WITH THE CONSTRUCTION DETAIL.

7. PLACE COMPOST FILTER SOCK AND ROCK FILTERS AS INDICATED ON THE EROSION AND

SEDIMENT CONTROL PLAN.

8. UPON INSTALLATION AND STABILIZATION OF ALL PERIMETER SEDIMENT CONTROL BMP'S

AND AT LEAST 3 DAYS PRIOR TO PROCEEDING WITH THE BULK EARTH DISTURBANCE

ACTIVITIES, THE CONTRACTOR SHALL PROVIDE NOTIFICATION TO THE TOWNSHIP.

9. STRIP AND STOCKPILE TOPSOIL FROM AREAS TO BE GRADED.

a. STOCKPILE TOPSOIL AS SHOWN ON THE EROSION AND SEDIMENT CONTROL PLAN.

b. STABILIZE STOCKPILE AND PROTECT AREA WITH COMPOST FILTER SOCKS. (NOTE:

WHENEVER DISTURBED AREAS ARE LEFT EXPOSED, TEMPORARILY SEED AND MULCH IN

ACCORDANCE WITH THE SEEDING SPECIFICATIONS.)

10. MINIMIZE SEDIMENTATION POTENTIAL:

a. SCHEDULE WORK FOR LOW FLOW SEASONS.

b. TIME IS OF ESSENCE TO COMPLETE BASIN CONSTRUCTION. MINIMIZE EXPOSED

DISTURBED AREAS BY LIMITING DAILY EXTENT OF EARTH DISTURBANCE. LEAVE AS MUCH

AREA UNDISTURBED AS POSSIBLE PRIOR TO EXCAVATION.

c. STABILIZE DISTURBED AREAS THAT RUNOFF TO BASINS AT END OF EACH DAY.

d. ENSURE REQUIRED MATERIALS ARE STOCKPILED AT SITE TO AVOID DELAYS.

e. CONSTRUCTION OF INDIVIDUAL BASINS SPECIFIED BELOW MAY TAKE PLACE

CONCURRENTLY OR INDIVIDUALLY IF STABILIZATION OF DISTURBED AREAS WILL NOT BE

DELAYED.

11. BASIN CONSTRUCTION (EACH):

a. EXISTING CONCRETE ENDWALLS ARE TO REMAIN.

b. REMOVE EXISTING ELLIPTICAL CMP AND REPLACE WITH O-RING RCP FROM ENDWALL TO

OUTLET STRUCTURE, INCLUDING ANTI-SEEP COLLAR AND STONE BACKFILL. INSTALL

RIPRAP APRON 'E0' WITH COMPOST FILTER SOCK AS SHOWN ON PLAN.

c. CLEAR, GRUB AND ROUGH GRADE PROPOSED BASIN AREA.

d. ANY PUMPED WATER FROM THE EXCAVATED AREAS MUST BE FILTERED PRIOR TO

DISCHARGING TO STREAM. USE A FILTER BAG AS SHOWN (SEE DETAIL).

e. INSTALL NEW RIPRAP APRON 'E1' AS SHOWN ON PLANS. MODIFY OUTLET STRUCTURE

AND INSTALL ALL UNDERDRAINS AND CLEANOUTS. CONSTRUCT SPILLWAY AND INSTALL

TRM.

f. STABILIZE DISTURBED AREAS.

g. FINISH GRADING.

h. REPLACE TOPSOIL TO A MINIMUM DEPTH OF 6-IN. AND FINISH GRADE, WHEREVER AND

WHENEVER POSSIBLE. SEED AND MULCH EACH AREA OF DISTURBANCE IMMEDIATELY

AFTER CONSTRUCTION IS COMPLETED. NO MORE THAN 15,000 S.F. OF DISTURBED AREA

SHALL REACH FINAL GRADE BEFORE INITIATING SEEDING AND MULCHING OPERATIONS.

GRADED AREAS SHOULD BE SCARIFIED OR OTHERWISE LOOSENED TO A DEPTH OF 3- TO

5-INCHES PRIOR TO TOPSOIL PLACEMENT.

PERFORM FINAL LANDSCAPING OPERATIONS. PERMANENTLY SEED AND MULCH

DISTURBED AREAS. SEEDING SHALL FOLLOW FERTILIZATION AND SEEDING RATES SPECIFIED

IN SEEDING SPECIFICATION CHART. IF FINISH GRADING IS NOT PRACTICAL TEMPORARILY

SEED ALL DISTURBED AREAS.

NOTE: THE TOWNSHIP ENGINEER MUST BE NOTIFIED PRIOR TO REMOVAL OF PRIMARY

EROSION AND SEDIMENT CONTROL BMP'S.

UPON FINAL STABILIZATION, REMOVE ALL OTHER TEMPORARY SEDIMENT CONTROLS. AN AREA

SHALL BE CONSIDERED TO HAVE ACHIEVED FINAL STABILIZATION WHEN IT HAS MINIMUM

UNIFORM 70% PERENNIAL VEGETATIVE COVER OR OTHER PERMANENT NON-VEGETATIVE COVER

WITH A DENSITY SUFFICIENT TO RESIST ACCELERATED SURFACE EROSION AND SUBSURFACE

CHARACTERISTICS SUFFICIENT TO RESIST SLIDING AND OTHER MOVEMENTS.

ANY SEDIMENT CONTROL, SUCH AS A COMPOST SOCK AND ROCK FILTERS MUST NOT BE

REMOVED UNTIL ALL VEGETATION (UPSTREAM OF THAT PARTICULAR CONTROL) HAS BEEN

RE-ESTABLISHED.

ANY AREA(S) DISTURBED DURING THE REMOVAL OF SEDIMENT CONTROLS SHALL BE

RE-STABILIZED.

TOPSOIL APPLICATION

GRADED AREAS SHOULD BE SCARIFIED OR OTHERWISE LOOSENED TO A DEPTH OF 3 TO 5

INCHES TO PERMIT BONDING OF THE TOPSOIL TO THE SURFACE AREAS AND TO PROVIDE A

ROUGHENED SURFACE TO PREVENT TOPSOIL FROM SLIDING DOWN SLOPE.

TOPSOIL SHOULD BE UNIFORMLY DISTRIBUTED ACROSS THE DISTURBED AREA TO A DEPTH OF

4 TO 8 INCHES MINIMUM - 2 INCHES ON FILL OUTSLOPES. SPREADING SHOULD BE DONE IN

SUCH A MANNER THAT SODDING OR SEEDING CAN PROCEED WITH A MINIMUM OF

ADDITIONAL PREPARATION OR TILLAGE. IRREGULARITIES IN THE SURFACE RESULTING FROM

TOPSOIL PLACEMENT SHOULD BE CORRECTED IN ORDER TO PREVENT FORMATION OF

DEPRESSIONS UNLESS SUCH DEPRESSIONS ARE PART OF THE PCSM PLAN.

TOPSOIL SHOULD NOT BE PLACED WHILE THE TOPSOIL OR SUBSOIL IS IN A FROZEN OR MUDDY

CONDITION, WHEN THE SUBSOIL IS EXCESSIVELY WET, OR IN A CONDITION THAT MAY

OTHERWISE BE DETRIMENTAL TO PROPER GRADING AND SEEDBED PREPARATION.

COMPACTED SOILS SHOULD BE SCARIFIED 6 TO 12 INCHES ALONG CONTOUR WHEREVER

POSSIBLE PRIOR TO SEEDING.

TABLE 11.1:

RECYCLING PROCEDURES:

THE POTENTIAL OR ANTICIPATED CONSTRUCTION WASTES FOR THIS PROJECT INCLUDE THOSE

THAT ARE INCIDENTAL TO THE DEMOLITION OF AN EXISTING COMMERCIAL/INDUSTRIAL

BUILDING AND ALSO TO RESIDENTIAL CONSTRUCTION, AS WELL AS THOSE ASSOCIATED WITH

THE CONSTRUCTION OF NEW RESIDENTIAL CONSTRUCTION WITH THE TYPICAL UTILITIES. THE

OPERATOR SHALL REMOVE FROM THIS SITE, RECYCLE, OR DISPOSE OF ALL BUILDING

MATERIALS AND WASTES IN ACCORDANCE WITH THE DEPARTMENT'S SOLID WASTE

MANAGEMENT REGULATIONS AT 25 PA. CODE 260.1 ET SEQ., 271.1 ET SEQ. THE CONTRACTOR

SHALL NOT ILLEGALLY BURY, DUMP, OR DISCHARGE ANY BUILDING MATERIAL OR WASTES AT

THIS SITE.

POTENTIAL POLLUTION IDENTIFICATION:

THE GEOLOGICAL FORMATIONS ON-SITE ARE SUCH THAT THE POLLUTION POTENTIAL IS NOT

CONSIDERED A CONCERN. THE SOIL CONDITIONS ON-SITE VARY TO SOME EXTENT WHERE THE

EXISTING SOILS MAY HAVE A POTENTIAL FOR EROSION. THE SOIL EROSION FROM THE

EXISTING SOILS COULD POTENTIALLY CAUSE WATER POLLUTION, AND TO MINIMIZE THIS

POTENTIAL THE EROSION AND SEDIMENT CONTROL BMPS MENTIONED ON THIS SHEET ARE

TO BE PROVIDED.

ANTIDEGREDATION ANALYSIS:

SINCE THIS PROJECT DOES NOT DRAIN TO HQ/EV WATER OR EV WETLANDS, THIS ANALYSIS IS

NOT APPLICABLE.

MINIMIZE DISTURBANCE EXTENT AND DURATION, MINIMIZE SOIL COMPACTION, MAXIMIZE

DRAINAGE AREA PROTECTION

IN ORDER TO MINIMIZE THE EXTENT AND DURATION OF EARTH DISTURBANCE, TO MINIMIZE

SOIL COMPACTION, AND TO MAXIMIZE DRAINAGE AREA PROTECTION, THE AREAS OUTSIDE

THE LIMITS OF DISTURBANCE ARE SUBJECT TO THE FOLLOWING CRITERIA:

· AREAS SHALL NOT BE SUBJECT TO GRADING OR MOVEMENT OF EXISTING SOIL

· EXISTING…

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File details come from the government source that posted it. Updated Mar 23, 2026.