S06 - Amendment 0004 - RFI Q 35 - AppendixK Drainage Report-231130.pdf

DRAINAGE REPORT

100% DESIGN SUBMISSION

VA BUTLER EHRM PROJECT

NEW MCR BUILDING

VA CAMPUS, BUTLER, PENNSYLVANIA

AE Project Number: 529-22-700 WSP Project Number: 31800188.005

19 October 2023

Prepared by Peter Bailey, P.E.

1 GENERAL DESCRIPTION

1.1 PURPOSE

The purpose of this report is to detail the drainage design and calculations that were performed for the new MCR Building site development as part of the overall EHRM project at the Butler PA VA Campus. This document includes the following:

• Pre-development and post-development conditions

• Design storm event

• Calculations for sizing of rain garden onsite storm water management

1.2 PROJECT SITE

The project site for the MCR building is located on the west side of the Butler VA campus next to building 30. The site is bordered by an existing drainage ditch to the north, wooded area to the west and existing gravel storage and stockpile areas to the south. The site is currently used for equipment storage next to the loading dock on the west side of building 30. The existing ground coverage is mainly compacted gravel surrounded by pervious areas on the perimeter. See vicinity map (exhibit 1) in Appendix A.

The Butler VA campus is not located within a mapped floodplain. See FEMA Flood Insurance Rate Map in Appendix A.

1.3 DESIGN CRITERIA

The following design criteria were utilized for the preparation of the drainage calculations and report:

• Site Design Manual, U.S. Department of Veterans Affairs, rev April 1, 2021

• Technical Guidance on Implementing the Stormwater Runoff Requirements for Federal Projects under Section 438 of the Energy Independence and Security Act, December 2009

• Township of Butler, PA Chapter 242 Stormwater Management, Article VII Design Criteria

• Butler County Act 167 County-Wide Stormwater Management Plan, June 2010 (rev December 2010)

• Pennsylvania Stormwater BMP Manual, December 30, 2006

• Pennsylvania Department of Environmental Protection, Erosion and Sediment Pollution Control Program Manual, March 2012

1.4 DESIGN METHODOLOGY

The EPA developed the technical guidance in EISA 438 to outline storm water runoff requirements for federal development or redevelopment projects. Any project on a federal facility with a footprint that exceeds 5,000 square feet are subject to these requirements. The intent is to maintain or restore the pre-development site hydrology during the development or redevelopment process. Implementation of EISA 438 is commonly achieved using green infrastructure/low impact development (GI/LID) best management practices (BMPs). The stormwater management design and calculations for the new MCR building followed EISA 438.

The VA site design manual (PG 18-10) requires local stormwater management and permitting requirements to be researched. All applicable local requirements must be considered and the more stringent requirement between federal, state, and local regulations shall be used.

The onsite storm water management for this project was designed in accordance with the Pennsylvania Stormwater Best Management Practices Manual (Penn BMP manual).

2 PRE & POST-DEVELOPMENT

CONDITIONS

2.1 Pre-Development Condition

In the predevelopment condition, the site is a mix of gravel and pervious surfaces. The Penn BMP manual requires all existing gravel surfaces to be modeled as pervious for design, so the area is assumed to be entirely pervious. In the MCR building project boundary, this equates to 0.85 acres of grass/forested pervious surface. pervious surface.

See pre-development Exhibit 2 in the Appendix A.

2.2 Post-Development Condition

The post-development condition consists of all site improvements to the existing that have taken place after construction completion. Site development for the new MCR building includes the following:

• Impervious surfaces: MCR building roof, concrete sidewalks, and asphalt pavement.

• Pervious surfaces: Landscaping restoration areas adjacent to MCR building and hardscape improvements.

See post-development Exhibit 3 in the Appendix A.

3 DESIGN STORM EVENT

3.1 Rainfall Data

The rainfall estimates for Pennsylvania are based on the NOAA Atlas 14 precipitation estimates updated in 2004. The design criteria for stormwater management and drainage facilities for this area is listed in Chapter 242 of the Township of Butler code.

The design storm event used for the MCR building project is the Soil Conservation Service Type II, twenty-four-hour rainfall distribution consistent with the following table:

Return Interval (year)

24-hour Rainfall Total (inches)

5 3.30

100 5.03

3.2 Time of Concentration

Existing Condition

The existing time of concentration for this project was calculated using the NRCS’s Lag Equation:

Time of Concentration = Tc = [ ( Tlag / 0.6 ) * 60 ] (min)

Where:

Tlag = Lag time (hours)

L = Hydraulic length of watershed (feet)

Y = Average overland slope of watershed (percent)

S = Maximum retention in watershed as defined by: S = [(1,000/CN)-10]

CN = NRCS curve number for watershed

See predeveloped Tc calculations in Appendix B.

Developed Condition

Due to the relatively small project footprint, the developed time of concentration was assumed at 5 minutes.

4 STORMWATER MANAGEMENT

CALCULATIONS

4.1 Low Impact Development (LID) BMP Selection

Due to the presence of pollution generating impervious surfaces to be constructed for this project, a water quality treatment BMP is required. The LID BMP selected for this project is a rain garden/bioretention facility (BMP 6.4.5 in Penn BMP manual). This BMP is located west of the new MCR building and asphalt pavement area. The roof runoff will be tightlined and directed into the rain garden by piped inlet and rip rap pads. Due to the flat grades on the site, the new pavement area will be graded to surface flow into the rain garden. For the higher runoff storm events, the rain garden has an overflow structure that will release the excess runoff into the existing drainage channel north of the site.

4.2 Rain Garden Design Calculations

The stormwater calculation process in the Penn BMP manual was followed to design the rain garden. General site information, identify applicable sensitive natural resources to be protected, and non-structural BMPs were determined. Then volume control guideline 1 was used for the rain garden. Peak rate mitigation wasn’t applicable to the site as the small site exemption was met. Water Quality compliance was met with primary and secondary BMPs for nitrate.

According to the geotechnical investigation, the site is generally underlain by fill consisting of silt, clay, sand, and rock fragments over stiff silt, clay, rock fragments, and carbonaceous rock fragments. The stabilized infiltration rate was measured at 2.40 inches per hour, therefore infiltration is feasible for this site.

See Penn BMP manual worksheets, spreadsheet calculations, and applicable exhibits of the stormwater design calculations in Appendix B.

APPENDIX A

WSP USA Inc.

33301 9th Avenue South Suite 300 Federal Way, WA 98003-2600

TEL: (206) 431-2300

FAX: (206) 431-2250

U.S. Department of Veterans Affairs

VA BUTLER EHRM PROJECT

NEW MCR BUILDING

EXHIBIT 1

VICINITY MAP

PROJECT

LOCATION

NOT TO SCALE

A S

TR

EE

T

BUILDING

W

W W

G

E E

E E

CO

M

M

CO

M

M

SD

SD

SD

SD

SD

CD

COMM

SA

NBUILDING

X X

X

X

X

X

X X

X X X

E

E

E

E

SD

SAN

SD

E

E

E

E

E

G

SD

SD

W

COMM

E

E

E

E

PRE-DEVELOPED AREA

AREA TYPE AREA (ACRE)

IMPERVIOUS 0

PERVIOUS 0.85

TOTAL 0.85

EXISTING CONDITIONS EXHIBIT

PROPERTY LINE

EXISTING

DRAINAGE DITCH

PROJECT

LIMITS

WSP USA Inc.

33301 9th Avenue South Suite 300 Federal Way, WA 98003-2600

TEL: (206) 431-2300

FAX: (206) 431-2250

U.S. Department of Veterans Affairs

VA BUTLER EHRM PROJECT

NEW MCR BUILDING

EXHIBIT 2

EXISTING CONDITIONS EXHIBIT

SCALE: 1" = 50'

*PRE-DEVELOPED AREA MODELED AS ALL PERVIOUS

Tc FLOWPATH

A S

TR

EE

T

BUILDING

W

W W

G

E E

E E

CO

M

M

CO

M

M

SD

SD

SD

SD

SD

CD

COMM

SA

NBUILDING

X X

X

X

X

X

X X

X X X

E

E

E

E

SD

SAN

SD

E

E

E

E

E

G

SD

SD

W

COMM

E

E

E

E

W

W

W

W

W

W

C(B)

C(B) C(B)

C(B) C(

B)

C( B)

C( B)

C(

IS

P)

C(

IS

P)

C(

IS

P)

C(ISP)

C(ISP)

C(ISP)

C(ISP)

C(A

C( A)

C( A)

C(A)

C (A

C(

A)

SD

C(B)

C

(ISP)

C(ISP)

SD

C (A)

C (A)

C(A)

C(A)

C(A)

C

(ISP)

C

(ISP)

WSP USA Inc.

33301 9th Avenue South Suite 300 Federal Way, WA 98003-2600

TEL: (206) 431-2300

FAX: (206) 431-2250

U.S. Department of Veterans Affairs

DEVELOPED AREA

AREA TYPE AREA (ACRE)

IMPERVIOUS 0.60

PERVIOUS 0.25

TOTAL 0.85

DEVELOPED CONDITIONS EXHIBIT

NEW MCR

BUILDING

PROPOSED

RAIN GARDEN

VA BUTLER EHRM PROJECT

NEW MCR BUILDING

EXHIBIT 3

DEVELOPED CONDITIONS EXHIBIT

SCALE: 1" = 50'

OUTFALL TO

EXISTING

DRAINAGE DITCH

FLOWPATH

APPENDIX B

Existing Condition Tc Calculation

VA Butler EHRM Project - New MCR Building

NRCS Lag Equation:

Time of Concentration = Tc = [ ( Tlag / 0.6 ) * 60 ] (min)

Where:

0.04 Tlag = Lag time (hrs)

138 L = Hydraulic length of watershed (feet)

5.8 Y = Average overland slope of watershed (percent)

4.08 S = Maximum retention in watershed as definded by:

S = [ ( 1,000 / CN ) - 10 ]

71 CN = NRCS curve number for watershed

3.5 Tc (min)

5.0 Tc (min), minimum used for design

Pennsylvania Stormwater Best Management Practices Manual Chapter 8

363-0300-002 / December 30, 2006 Page 28 of 46

Map Existing Conditions and Sensitive Natural Resources

Determine applicable Non-Structural

BMPS

No Yes

Recommended to use Flow Chart B (Primary Control

Guideline 1 - CG 1)

Complete Worksheet 1 General Site Information

Complete Worksheet 2 to determine credits for protecting sensitive Natural Resources

Complete Worksheet 3 for Non-Structural BMP credit

Is the development site a Mining Area, Urban Redevelopment Area, Brownfield

Area, or a small site with minimal disturbance and imperviousness

Recommended to use Flow Chart C (Primary Control

Guideline 2 - CG 2)

VA Butler EHRM Project MCR Building Storm Calcs

363-0300-002 / December 30, 2006 Page 29 of 46

Date:

Project Name:

Municipality:

County:

Total Area (acres):

Major River Basin:

http://www.dep.state.pa.us/dep/deputate/watermgt/wc/default.htm#newtopics

Watershed:

Sub-Basin:

Nearest Surface Water(s) to Receive Runoff:

Chapter 93 - Designated Water Use:

http://www.pacode.com/secure/data/025/chapter93/chap93toc.html

Impaired according to Chapter 303(d) List? Yes http://www.dep.state.pa.us/dep/deputate/watermgt/wqp/wqstandards/303d-Report.htm No

List Causes of Impairment:

Is project subject to, or part of:

Municipal Separate Storm Sewer System (MS4) Require ments? Yes

No

Existing or planned drinking water supply? Yes

No

If yes, distance from proposed discharge (miles):

Approved Act 167 Plan? Yes

No

Existing River Conservation Plan? Yes http://www.dcnr.state.pa.us/brc/rivers/riversconservation/planningprojects/ No

Worksheet 1. General Site Information INSTRUCTIONS: Fill out Worksheet 1 for each waters hed http://www.dep.state.pa.us/dep/deputate/watermgt/wc/Subjects/StormwaterManagem ent/Approved_1.html http://www.dep.state.pa.us/dep/deputate/watermgt/wc/Subjects/StormwaterManagem ent/GeneralPermits/default.htm

11 Oct 2023

VA Butler EHRM Project - Proposed MCR Building

Butler Township

Butler County

0.85 AC

Ohio River Basin

Slippery Rock, Connoquenessing

Little Connoquenessing Creek

Little Connoquenessing Creek (small watershed)

(large watershed)

WWF

X

X

X

X

363-0300-002 / December 30, 2006 Page 30 of 46

INSTRUCTIONS:

Steep Slopes, over 25%

Other:

Other:

TOTAL EXISTING:

Natural Drainage Ways

Steep Slopes, 15% - 25%

TOTAL AREA

(Ac.)

MAPPED?

yes/no/n/a

Floodplains

Riparian Areas

Wetlands

Woodlands

PROTECTED

AREA (Ac.)

EXISTING NATURAL

SENSITIVE RESOURCE

Worksheet 2. Sensitive Natural Resources

Waterbodies

1. Provide Sensitive Resources Map according to non-structural BMP 5.4.1 in Chapter 5. This map should identify wetlands, woodlands, natural drainage ways, steep slopes, and other sensitive natural areas.

2. Summarize the existing extent of each sensitive resource in the Existing Sensitive Resources Table (below, using Acres). If none present, insert 0.

3. Summarize Total Protected Area as defined under BMPs in Chapter 5.

4. Do not count any area twice. For example, an area that is both a floodplain and a wetland may only be considered once.

N/A for this project

363-0300-002 / December 30, 2006 Page 31 of 46

1.1 Ac.

1.2 Ac.

3.1 Ac.

TOTAL Ac.

Site Area minus Protected

Area

3.1 Minimum Soil Compaction

Lawn ft2 x 1/4" x 1/12 = ft3

Meadow ft2 x 1/3" x 1/12 = ft3

3.3 Protect Existing Trees

For Trees within 100 feet of impervious area:

Tree Canopy ft2 x 1/2" x 1/12 = ft3

5.1 Disconnect Roof Leaders to Vegetated Areas

For runoff directed to areas protected under 5.8.1 and 5.8.2

Roof Area ft2 x 1/3" x 1/12 = ft3

For all other disconnected roof areas

Roof Area ft2 x 1/4" x 1/12 = ft3

5.2 Disconnect Non-Roof impervious to Vegetated Area s

For Runoff directed to areas protected under 5.8.1 and 5.8.2

Impervious Area ft2 x 1/3" x 1/12 = ft3

For all other disconnected roof areas

Impervious Area ft2 x 1/4" x 1/12 = ft3 ft3

* For use on Worksheet 5

Worksheet 3. Nonstructural BMP Credits

Area of Protected Sensitive/Special Value Features (see WS 2)

Area of Riparian Forest Buffer Protection

Area of Minimum Disturbance/Reduced Grading

PROTECTED AREA

Stormwater Management Area

This is the area that requires stormwater management

TOTAL NON-STRUCTURAL VOLUME CREDIT*

VOLUME CREDITS

5,556 116

363-0300-002 / December 30, 2006 Page 32 of 46

S ee

G ui de lin e:

V ol um e

C re di ts fo r

D et en tio n R ou tin g"

FLOW CHART B

Control Guideline 1 Process

Estimate Net Increase in Runoff Volume for 2-year/24 hour storm

Worksheet 4

Reduce Runoff Volume with Non-Structural BMPs

Determine Structural BMPs

Determine Structural and Non- Structural BMP Credits

Worksheet 5

Can 2-yr/24 hour volume increase be managed with structural and non-structural BMPs?

Secondary Control Guideline (CG 2) applies

Demonstrate Peak Rate Mitigation

1-year to 100-year

Increase size and/or number of BMPs

Small Site Exemption (Worksheet 6)

Model with Volume Diversion

Model with Composite BMPs

Model with Tt/Tc Adjustment

Yes No

Other Method

Or

Or

Or

Or

363-0300-002 / December 30, 2006 Page 33 of 46

PROJECT:

Drainage Area:

2-Year Rainfall: in

Total Site Area: acres Protected Site Area: acres Managed Area: acres

Existing Conditions:

Cover Type/Condition Soil Area Area CN S Ia Q

Runoff 1 Runoff

Volume 2

Type (sf) (ac) (0.2*S) (in) (ft 3) W oodland Meadow Impervious

TOTAL:

Developed Conditions:

Cover Type/Condition Soil Area Area CN S Ia Q

Runoff 1 Runoff

Volume 2

Type (sf) (ac) (0.2*S) (in) (ft 3)

TOTAL:

2-Year Volume Increase (ft3):

2-Year Volume Increase = Developed Conditions Runof f Volume - Existing Conditions Runoff Volume

1. Runoff (in) = Q = (P - 0.2S)2 / (P+ 0.8S) where

P = 2-Year Rainfall (in)

S = (1000/ CN)-10

2. Runoff Volume (CF) = Q x Area x 1/12

Q = Runoff (in)

Area = Land use area (sq. ft)

Note: Runoff Volume must be calculated for EACH la nd use type/condition and HSGl.

The use of a weighted CN value for volume calculati ons is not acceptable.

WORKSHEET 4 . CHANGE IN RUNOFF VOLUME FOR 2-YR STOR M EVENT

See attached spreadsheet for calculations

WORKSHEET 4

PROJECT: VA Butler EHRM - New MCR Building

Drainage Area:

2-Year Rainfall (in) 3.3 Butler Township Development Code

Total Site Area: 0.85 acres

Protected Site Area: 0 acres

Managed Area: 0 acres

Existing Conditions:

Cover Type/Condition

Soil

Type

Area

(sf)

Area

(ac) CN S

Ia

(0.2*S)

Q

Runoff

(in)

Runoff

Volume

(ft

Woodland C 0 0.00 71 4.08 0.82 0.94 0

Meadow C 37053 0.85 71 4.08 0.82 0.94 2899

Impervious C 0 0.00 71 4.08 0.82 0.94 0

TOTAL: 37053 0.85 2.82 2899

Developed Conditions:

Cover Type/Condition

Soil

Type

Area

(sf)

Area

(ac) CN S

Ia

(0.2*S)

Q

Runoff

(in)

Runoff

Volume

(ft

Roof C 5419 0.12 98 0.20 0.04 3.07 1385

Concrete Sidewalk C 1154 0.03 98 0.20 0.04 3.07 295

Asphalt Pavement C 19389 0.45 98 0.20 0.04 3.07 4956

Landscape/Pervious C 11091 0.25 74 3.51 0.70 1.10 1020

TOTAL: 37053 0.85 10.31 7656

2-Year Volume Increase (cf ): 4757

BMP Length 185

BMP Width 20

BMP Area 4275

BMP 6.4.5: Rain Garden / Bioretention

1. surface storage area volume (CF)

Bed Area (sq ft) 4275

Average Design Water Depth 1.0 (6" sediment storage)

2a. Infiltration Volume

Bed Bottom area (sq ft) 4275

Infiltration design rate (in/hr) 0.8

Infiltration period (hr) 24

2b. Volume

Bed Bottom area (sq ft) 4275 soil mix bed depth 1.5 void space 0.22 grass mix on lightly compacted topsoil

Storage Volume (CF) Provided 5686

363-0300-002 / December 30, 2006 Page 34 of 46

PROJECT:

SUB-BASIN:

Proposed BMP Area Storage Volume

(ft 2) (ft 3)

6.4.1 Porous Pavement

6.4.2 Infiltration Basin

6.4.3 Infiltration Bed

6.4.4 Infiltration Trench

6.4.5 Rain Garden/Bioretention

6.4.6 Dry Well / Seepage Pit

6.4.7 Constructed Filter

6.4.8 Vegetated Swale

6.4.9 Vegetated Filter Strip

6.4.10 Berm

6.5.1 Vegetated Roof

6.5.2 Capture and Re-use

6.6.1 Constructed W etlands

6.6.2 Wet Pond / Retention Basin

6.6.3 Dry Extended Detention Basin

6.6.4 Water Quality Filters

6.7.1 Riparian Buffer Restoration

6.7.2 Landscape Restoration / Reforestation

6.7.3 Soil Amendment

6.8.1 Level Spreader

6.8.2 Special Storage Areas

Other

Total Structural Volume (ft 3):

Structural Volume Requirement (ft 3):

DIFFERENCE

(Required Control Volume minus Non-structural Credi t)

WORKSHEET 5 . STRUCTURAL BMP VOLUME CREDITS

Non-structural Volume Credit (ft 3) - from Worksheet 3 :

Required Control Volume (ft 3) - from Worksheet 4 :

Structural Volume Reqmt (ft 3)

See attached spreadsheet for calculations

WORKSHEET 5

PROJECT: Butler VA EHRM - New MCR Building

SUB-BASIN:

Required Control Volume (ft3) - from Worksheet 4: 4757

Non-structural Credit (ft3) - from Worksheet 3: 116

Structural Volume Requirement (ft3) 4641

Proposed BMP

Area

(ft2)

Storage

Volume

(ft3)

6.4.1 Porous Pavement 0 0

6.4.2 Infiltration Basin 0 0

6.4.3 Infiltration Bed 0 0

6.4.4 Infiltration Trench 0 0

6.4.5 Rain Garden / Bioretention 4275 5686

6.4.6 Dry Well / Seepage Pit 0 0

6.4.7 Constructed Filter 0 0

6.4.8 Vegetated Swale 0 0

6.4.9 Vegetated Filter Strip 0 0

6.4.10 Berm 0 0

6.5.1 Vegetated Roof 0 0

6.5.2 Capture and Re-use 0 0

6.6.1 Constructed Wetlands 0 0

6.6.2 Wet Pond / Retention Basin 0 0

6.6.3 Dry Extended Detention Basin 0 0

6.6.4 Water Quality Filters 0 0

6.7.1 Riparian Buffer Restoration 0 0

6.7.2 Landscape Restoration / Reforestation 0 0

6.7.3 Soil Amendment 0 0

6.8.1 Level Spreader 0 0

6.8.2 Special Storage Areas 0 0

Other 0 0

Total Structural Volume Provided (ft3): 5686

Structural Volume Requirement (ft3): 4641

DIFFERENCE 1045

363-0300-002 / December 30, 2006 Page 35 of 46

The 2-Year/24 Hour Runoff Volume increase must be met in BMPs designed in accordance with Manual Standards

Total Site Impervious Area may not exceed 1 acre.

Maximum Development Area is 10 acresis 5 Acres

Maximum site impervious cover is 50%.

No more than 25% Volume Control can be in Non-structural BMPs

Infiltration BMPs must have an infiltration of at least 0.5 in/hr.

Site Area Percent

Impervious Total

Impervious

5 acre 20% 1 acre

2 acre 50% 1 acre

1 acre 50% 0.5 acre

0.5 acre 50% 0.25 acre

The following conditions must be met for exemption from peak rate analysis for small sites under CG-1:

WORKSHEET 6 . SMALL SITE / SMALL IMPERVIOUS AREA

EXCEPTION FOR PEAK RATE MITIGATION CALCULATIONS

X

X

363-0300-002 / December 30, 2006 Page 40 of 46

Flow Chart D Water Quality Process

Is 90% of the disturbed area controlled by a

BMP?

Show use of specific nitrate prevention / reduction BMPs (Worksheet 10); TSS and TP requirements met

Does design comply with CG 1 or CG 2 requirements for volume control?

NoYes

No

Yes

Complete Worksheet 12 Pollutant Load Estimate

Complete Worksheet 13 Pollutant Load Reduction for

BMPs

Water Quality Compliance

Yes

No

Show use of specific BMPs for Pollutant Prevention

(Worksheet 11)

Water Quality Compliance

Yes

363-0300-002 / December 30, 2006 Page 41 of 46

PRIMARY BMPs FOR NITRATE:

YES NO

SECONDARY BMPs FOR NITRATE:

WORKSHEET 10. WATER QUALITY COMPLIANCE FOR NITRATE

Structural BMP 6.4.9 - Vegetated Filter Strip

Structural BMP 6.6.1 - Constructed Wetland

NS BMP 5.4.3 - Protect / Utilize Natural Drainage F eatures

NS BMP 5.6.2 - Minimize Soil Compaction

Structural BMP 6.4.5 - Rain Garden / Bioretention

Structural BMP 6.4.8 - Vegetated Swale

Structural BMP 6.7.1 - Riparian Buffer Restoration

Structural BMP 6.7.2 - Landscape Restoration

NS BMP 5.9.1 - Street Sweeping / Vacuuming

Structural BMP 6.7.3 - Soils Amendment/Restoration

Structural BMP 6.7.1 - Riparian Buffer Restoration

Structural BMP 6.7.2 - Landscape Restoration

NS BMP 5.4.1 - Protect Sensitive / Special Value Fe atures

Does the site design incorporate the following BMPs to address nitrate pollution? A summary "yes" rating is achieved if at least 2 Primary BMPs for n itrate are provided across the site or 4 secondary BMPs for nitrate are provided across the site (or t he

NS BMP 5.6.3 - Re-Vegetate / Re-Forest Disturbed Ar eas (Native Species)

NS BMP 5.4.2 - Protect / Conserve / Enhance Riparia n Buffers

NS BMP 5.5.4 - Cluster Uses at Each Site

NS BMP 5.6.1 - Minimize Total Disturbed Area

X

X

X

X

2 Primary BMPs and 3 Secondary BMPs --> Water Quality Compliance

ELK

TIOGA

ERIE

YORK

CENTRE

POTTER

BERKS

PIKE

LYCOMING

MCKEAN

WAYNE

BEDFORD

BRADFORD

INDIANA

CLINTON

WARREN

BUTLER

LUZERNE

SOMERSET

CLEARFIELD

FAYETTE

BLAIR

BUCKS

CRAWFORD

LANCASTER

PERRY

CHESTER

MERCER

FRANKLIN

CAMBRIA

ADAMS

MONROE

GREENE

CLARION

VENANGO

HUNTINGDON

SCHUYLKILL

WASHINGTON

ALLEGHENY

DAUPHIN

WESTMORELAND

FULTON

BEAVER

JEFFERSON

SUSQUEHANNA

MIFFLIN

FOREST

ARMSTRONG

UNION

JUNIATA

SULLIVAN

COLUMBIA

LEHIGH

CARBON

WYOMING

SNYDER

CUMBERLAND

CAMERON

LEBANON

LACKAWANNA

MONTGOMERY

LAWRENCE

NORTHUMBERLAND

NORTHAMPTON

DELAWARE

MONTOUR

PHILADELPHIA

Sources: Esri, HERE, DeLorme, USGS, Intermap, increment P Corp., NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, MapmyIndia, © OpenStreetMap contributors, and the GIS User Community

PENNSYLVANIA'S MAJOR RIVER BASINS

Jack Hill, Resources Management Section, 9/17/2014 0 50 10025

Milesµ Gunpowder Watershed Northeast / Elk River Watershed Ohio River Basin

Erie Watershed / Great Lakes Basin Genesee Watershed / Great Lakes Basin Delaware River Basin

Potomac River Basin Susquehanna River Basin

OHIO RIVER

BASIN

SUSQUEHANNA RIVER

BASIN

DELAWARE RIVER

BASIN

POTOMAC RIVER

BASIN

GREAT LAKES BASIN

(ERIE WATERSHED)

GUNPOWDER

WATERSHED

ELK / NORTHEAST

WATERSHED

GREAT LAKES BASIN

(GENESEE WATERSHED)

Butler VA Site

Slippery Rock Creek

Connequessing Creek

Beaver River

Ohio River

Butler VA EHRM Project New MCR Building