pollutant reduction plan - spring township€¦ · pollutants of concern, existing sediment...
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Pollutant Reduction Plan
Logan Branch and Chesapeake Bay
June 16, 2017
Prepared For:
Spring Township
Centre County, PA
1309 Blanchard Street
Bellefonte, PA 16823
Prepared By:
Table of Contents
1.0 Purpose and Scope ............................................................................................................... 1
2.0 Permit Requirements............................................................................................................ 1
3.0 Background/Setting ............................................................................................................. 2
3.1 Logan Branch ........................................................................................................................... 3
3.2 Chesapeake Bay....................................................................................................................... 4
4.0 Pollutant Reduction .............................................................................................................. 4
4.1 Public Participation ................................................................................................................... 4
4.2 Storm Sewersheds.................................................................................................................... 4
4.3 Pollutants of Concern................................................................................................................ 5
4.4 Existing Pollutant Loading.......................................................................................................... 5
4.5 Proposed Best Management Practices (BMPs) ........................................................................... 6
4.6 Funding Mechanisms................................................................................................................ 7
4.7 Operations and Maintenance..................................................................................................... 8
5.0 Conclusion ............................................................................................................................. 8
6.0 Definitions ............................................................................................................................. 8
Appendix A Public Comment and ReponsesAppendix B Developed Land Loading Rates for PA CountiesAppendix C Supporting CalculationsAppendix D Proposed BMP MapAppendix E Storm Sewershed/Land Cover Map
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1.0 Purpose and Scope
Spring Township is required to develop and implement a Pollutant Reduction Plan (PRP) for Municipal
Separate Storm Sewer System (MS4) discharges to Logan Branch and the Chesapeake Bay as part
of the 2018 National Pollutant Discharge Elimination System (NPDES) MS4 Individual Permit
application to the Pennsylvania Department of Environmental Protection (PA DEP). The purposes of
this plan is to improve water quality to surface waters listed as impaired for sediment and/or
nutrients.
This document will serve as the single plan for both the Chesapeake Bay PRP and the Logan Branch
PRP requirements. This plan has been prepared based on the best and most current guidance made
available by PA DEP. Definitions of relevant regulatory terms have been provided in Section 6.0 of
this report.
2.0 Permit Requirements
In order to develop a PRP, it is important to have an understanding of the Township’s requirements.
Spring Township is required by the PA DEP and United States Environmental Protection Agency (EPA)
to reduce sediment loading by ten (10) percent, phosphorous loading by five (5) percent, and nitrogen
loading by three (3) percent from stormwater discharges to the Chesapeake Bay and phosphorous
loading from stormwater discharges to streams impaired by nutrients (Logan Branch) by five (5)
percent over the five (5) year permit term (March 16, 2018 to March 15, 2023) by implementing
projects or Best Management Practices (BMPs).
Spring Township has MS4 discharges or “outfalls” to Logan Branch. Logan Branch is listed by the
2014 Pennsylvania Integrated Water Quality Monitoring and Assessment Report (Integrated Report)
as impaired for Organic Enrichment/Low Dissolved Oxygen (D.O.) (i.e. nutrients). Logan Branch
ultimately drains to the Chesapeake Bay. By satisfying the reduction requirements for Logan Branch,
the Township will also satisfy the reduction requirements for the Chesapeake Bay as further
described in the sections below.
Table 1- MS4 Requirements Table (Municipal) Except
MS4 NameNPDES
ID
IndividualPermit
Required?Reason
ImpairedDownstream Watersor Applicable TMDL
Name
Requirement(s)Other Cause(s) of
Impairment
Spring Twp,Centre County
Yes SP
Chesapeake BayNutrients/Sediment
Appendix D-Nutrients,Siltation (4a)
Logan Branch
Appendix C-PCB (5),Appendix E-Organic
Enrichment/Low D.O.(5)
Bald Eagle CreekAppendix B-
Pathogens (5)
2
Spring Township is required to reduce the phosphorous loading to Logan Branch by five (5) percent
over the five (5) year permit term. To comply with the Chesapeake Bay PRP, it is also required to
reduce sediment by ten (10) percent, phosphorous by five (5) percent, and nitrogen by three (3)
percent within the five (5) year permit term.
3.0 Background/Setting
Spring Township comprises approximately 27 square miles located in the center of Centre County, in
the middle of Pennsylvania. Approximately 800 acres of the western portion of the Township have
been designated as 2010 Urbanized Area (U.S. Census Bureau).
Figure 1: Spring Township Location Map
Figure 2 below displays a map of the streams that cross Spring Township, along with the 2010
Urbanized Area (hatched). Stream segments colored red indicate impaired portions of streams.
Spring Township has a total of seven (7) MS4 outfalls, all of which discharge to the impaired portion
of Logan Branch, and ultimately the Chesapeake Bay. The Urbanized Area define the jurisdictional
limits of the NPDES MS4 permit. The Township is responsible for outfalls that discharge stormwater
from or within the Urbanized Area.
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Figure 2: Spring Township 2010 Urbanized Area and Impaired Streams
3.1 Logan Branch
Logan Branch flows into the western portion of the Township from the south in a northerly direction
and into Spring Creek, near the Township boundary with the Borough of Bellefonte. The segment of
Logan Branch that flows through the Township was listed in 1998 as impaired for polychlorinated
biphenyls (PCBs) (source unknown) and in 2004 for organic enrichment/low D.O. (industrial point
sources). The downstream portion of Logan Branch from Mann Road northward is not listed as
impaired. Table 2 below lists the impairment information from the 2014 Integrated Report.
The Township has seven (7) MS4 outfalls that discharge to the section of Logan Branch listed as
impaired for organic enrichment/low D.O. Refer to Appendices for MS4 mapping.
Table 2: 2014 Integrated Report – Logan BranchImpairment Cause Impairment Source Category Assessed Use Date Listed
Organic Enrichment/Low D.O. Industrial Point Source 5 Aquatic Life 2004
PCB Source Unknown 5 Fish Consumption 1998
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3.2 Chesapeake Bay
Logan Creek flows into Spring Creek, which drains to Bald Eagle Creek, then the North Branch of the
Susquehanna River, then the Susquehanna River, and ultimately reaches the Chesapeake Bay. The
actions taken to reduce phosphorous loading to Logan Creek by five (5) percent will also address the
PRP requirements of the Chesapeake Bay, as illustrated further in the sections below.
The seven (7) MS4 outfalls that discharge to Logan Branch also ultimately drain to the Chesapeake
Bay. Refer to Appendices for MS4 mapping.
4.0 Pollutant Reduction
Per the MS4 permit and PRP Instructions document (3800-PM-BCW0100k Rev. 3/2017), the
following sections are addressed and described below: Public Participation, Storm Sewersheds,
Pollutants of Concern, Existing Sediment Loading, Proposed Best Management Practices (BMPs),
Funding Mechanisms, and Operations and Maintenance.
4.1 Public Participation
Spring Township made this plan available to the public to review and provide comment for thirty (30)
days. A copy of the public notice was published as required, initiating the 30 day comment period,
and is in Appendix A. All timely comments received and a record of consideration of these comments
will be located in Appendix A.
The PRP will be presented at the Board of Supervisors workshop meeting on August 7, 2017.
Comments will be accepted at this meeting from any interested members of the public.
4.2 Storm Sewersheds
Storm sewersheds that drain to each of the seven (7) outfalls were manually delineated in ArcMap
10.5 using two (2) foot topographic contours from the 2006-2008 PAMAP Program data published
by the Pennsylvania Department of Conservation and Natural Resources (DCNR), while referencing
Google Street View and multiple sources of aerial imagery.
“Parsing” provides an opportunity to eliminate areas within storm sewersheds from the existing
pollutant load that do not drain to the MS4 and areas that are already covered by an NPDES permit
for the control of stormwater. No areas were parsed out of the storm sewersheds in the development
of this plan. No storm sewersheds extend outside of the municipal boundary. Therefore, the storm
sewershed boundaries are synonymous with the planning area boundaries. A map illustrating the
storm sewersheds can be found in Appendix E.
The following table (Table 3) includes a list of outfalls and the associated storm sewershed acreage
that drain to each outfall.
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Table 3: Storm Sewershed Acreage by Outfall
Receiving Water Outfall Number Storm Sewershed (acres)
Logan Branch/Chesapeake Bay
1 0.112 20.493 82.214 57.335 0.326 0.047 0.28
TOTAL 160.78
4.3 Pollutants of Concern
There are three (3) pollutants of concern that Spring Township is required to address: sediment,
phosphorous and nitrogen. To meet the requirements, minimum reductions of ten (10) percent
sediment, five (5) percent phosphorous, and three (3) percent nitrogen have been demonstrated in
this plan.
4.4 Existing Pollutant Loading
To determine the existing pollutant loading to Logan Branch and the Chesapeake Bay, the general
methodology described in the DEP guidance document entitled “Pollution Reduction Plan: A
Methodology” was utilized.
Utilizing ArcGIS 10.5, 2011 National Land Cover Dataset (NLCD) data, the acreage of each land cover
classification type within the storm sewersheds was calculated. The aggregate NLCD statistics within
the storm sewersheds for each impaired receiving water is compiled below (Table 4) with a
breakdown of the area by land cover classification type. Refer to Appendix F for the Land Cover Map.
Table 4: NLCD 2011 Land Cover to Impervious/Pervious Conversion
ReceivingWaters
Number of StormSewersheds within
HUC 12
NLCD Land CoverClassification
Area(acres)
PercentImpervious
ImperviousArea (acres)
PerviousArea
(acres)
LoganBranch/
ChesapeakeBay
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Developed, Open Space 57.73 19 10.97 46.76
Developed, LowIntensity
63.65 49 31.19 32.46
Developed, MediumIntensity
1.18 79 0.93 0.25
Hay/Pasture 14.09 0 14.09Cultivated Crops 6.85 0 6.85Deciduous Forest 17.28 0 17.28
TOTAL 160.78 43.09 117.69
6
“Developed” land cover classifications were then converted to percent impervious coverage based
on the NLCD 2011 definitions. The impervious percentages used are as follows:
Developed, Open Space – 19% impervious
Developed, Low Intensity – 49% impervious
Developed, Medium Intensity – 79% impervious
Developed, High Intensity – 100% impervious
All other land cover classifications were assumed to be 100 percent pervious. The “Developed Land
Loading Rates for PA Counties” (Attachment B of the PRP Instructions) for Centre County were then
applied for impervious developed and pervious developed. This table is attached as Appendix B.
The existing sediment loading quantified from the entire Planning Area is 101,741.75 lbs/yr,
phosphorous loading is 171.76 lbs/yr, and nitrogen loading is 3,007.38 lbs/yr. A more detailed
breakdown is located in Table 5 below. Please refer to Appendix D for supporting calculations.
Table 5: Existing Sediment Loading for Stormwater Outfalls to Sediment Impaired Streams
Pollutant Load
Receiving Water Land Use Area (ac) TN (lbs/yr) TP (lbs/yr)TSS [Sediment]
(lbs/yr)
Logan Branch/Chesapeake Bay
Impervious,Developed
43.09 827.76 99.97 76,339.54
Pervious, Developed 117.69 2,179.62 71.79 25,402.21TOTAL: 3,007.38 171.76 101,741.75
4.5 Proposed Best Management Practices (BMPs)
Spring Township proposed to meet the required pollutant load reductions for Logan Branch and the
Chesapeake Bay by implementing a basin retrofit project within the Planning Area in the
Steeplechase development during the five (5) year permit term. Proposed BMPs should be located
within or downstream of the 2010 Urbanized Area boundary.
This BMP was identified by analyzing the most fiscally responsible solution that will provide a water
quality improvement and real-world benefit, while meeting the mandated pollutant reduction
requirements. This analysis was performed in ArcMap 10.5 using aerial imagery, two (2)-foot
topographic contours, and hydrologic data. Site visits were conducted to verify project viability and
collect information and measurements of existing BMPs where applicable.
As there were no opportunities with projects in the planning/design phase or with existing BMPs on
Township-owned property within the Planning Area, BMP retrofits on private property were assessed
for retrofit. The Steeplechase Basin Retrofit project treats a large drainage area and reduces the
number of BMPs to be implemented.
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Pollutant reductions resulting from the proposed BMPs were quantified using the same methodology
stated above for existing sediment loading with the drainage area for each BMP, then applying
reduction rates. Reductions from retrofits of existing BMPs were calculated using the methodology in
the “Recommendations of the Expert Panel to Define Removal Rates for Urban Stormwater Retrofit
Projects” (revised January 20, 2015). Please refer to Appendix C for supporting calculations.
Sediment and nutrient load reductions achieved through the proposed implementation of the
Steeplechase Basin Retrofit are located Table 6 below. A total sediment reduction of 13 percent,
total phosphorous reduction of 14 percent, and a total nitrogen reduction of 14 percent have been
achieved, exceeding the minimum required reductions of 10 percent, 5 percent, and 3 percent,
respectively.
Table 6: Pollutant Load Reductions from Proposed BMPs
BMPName
DrainageArea(ac)
TSS Reduction TP Reduction TN Reduction
lbs/yr %% of
RequiredReduction
lbs/yr %% of
RequiredReduction
Lbs/yr %% of
RequiredReduction
SteeplechaseBasin Retrofit
82.21 13,581.41 13 133 23.86 14 277429.07
14 475
The scope of the proposed BMP is described in more detail below.
Steeplechase Basin Retrofit
This BMP consists of the retrofit of an existing basin at the entrance of the Steeplechase
development, on the south side of Steeplechase Drive, near the intersection of Axemann Road. The
drainage area to this basin is 82.21 acres. A steel plate will be installed over the current orifice,
effectively reducing the orifice size to six (6) inches, to promote infiltration and extended detention,
increasing water quality benefits. The ownership of the basin is currently in the process of being
converted from the developer to the Steeplechase Homeowners Association (HOA).
4.6 Funding Mechanisms
The funding mechanisms and estimated costs for the implementation of the proposed BMP are
included in Table 7. The costs provided are conceptual, to be utilized for preliminary planning
purposes only, and subject to change.
Table 7: Proposed BMP Funding Mechanisms
Proposed BMP Property OwnerFunding
MechanismEstimated
Design Cost1
EstimatedConstruction
Cost2
Total EstimatedCost
SteeplechaseBasin Retrofit
SteeplechaseDeveloper/HOA
Spring Township $3,500 $2,500 $6,000
1Estimated Design Cost includes survey, design, engineering, any anticipated permitting, bid administration, andconstruction inspection. Developed based on 2017 costs/rates.
2Estimated Construction Cost includes construction, materials, and as-built survey. Developed based on 2017costs/rates. It does NOT include costs associated with operations and maintenance (O&M).
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4.7 Operations and Maintenance
To ensure the long-term effectiveness of these proposed BMPs, operation and maintenance (O&M)
is crucial. The chart below (Table 8) outlines the responsible party and the necessary O&M practices
required for each proposed BMP (Pennsylvania Stormwater BMP Manual, December 30, 2006).
Table 8: Proposed BMP O&M Responsibilities
BMP OwnerResponsible Party for
O&MO&M Responsibilities
Steeplechase BasinRetrofit
SteeplechaseDeveloper/HOA
SteeplechaseDeveloper/HOA
Inspect at least 2x per year Clean inlets at least 2x per
year Maintain vegetation Remove invasive species Prohibit vehicular access Avoid excessive compaction by
mowers Drain-down time < 72 hours Mow as appropriate (remove
clippings) Remove accumulated
sediment
5.0 Conclusion
The required ten (10) percent sediment, five (5) percent phosphorous, and three (3) percent nitrogen
reductions have been achieved through the proposed implementation of one (1) basin retrofit project
at the entrance to the Steeplechase development. This BMP will be implemented by March 15, 2023.
9
6.0 Definitions
Best Management Practices (BMPs): Schedules of activities, prohibitions of practices, structural
controls (e.g., infiltration trenches), design criteria, maintenance procedures, and other management
practices to prevent or reduce pollution to the waters of the Commonwealth. BMPs include Erosion
and Sedimentation Control Plans, Post Construction Stormwater Management Plans, MS4 TMDL
Plans, Stormwater Management Act Plans, and other treatment requirements, operating procedures
and practices to control runoff, spillage or leaks, sludge or waste disposal, drainage from raw material
storage, and methods to reduce pollution, to recharge groundwater, to enhance stream base flow
and to reduce the threat of flooding and stream bank erosion. [NPDES Stormwater Discharges from
Small MS4s General Permit 5/2016 (PAG-13)]
Municipal Separate Storm Sewer System (MS4): All separate storm sewers that are defined as “large”
or “medium” or “small” municipal separate storm sewer systems pursuant to 40 CFR §§
122.26(b)(18), or designated as regulated under 40 CFR § 122.26(a)(1)(v). [PAG-13]
National Pollutant Discharge Elimination System (NPDES): A permit issued under 25 Pa. Code
Chapter 92a (relating to National Pollutant Discharge Elimination System permitting, monitoring and
compliance) for the discharge or potential discharge of pollutants from a point source to surface
waters. [PAG-13]
Outfall: A “Point Source” as defined by 40 CFR § 122.2 is the point where an MS4 discharges
stormwater to other surface waters of this Commonwealth. This does not include open conveyances
connecting two municipal separate storm sewers, or pipes, tunnels or other conveyances which
connect segments of the same stream and are used to convey waters of the Commonwealth (40 CFR
§ 122.26 (b) (9)). [PAG-13]
Owner or operator: The owner or operator of any “facility” or “activity” subject to regulation under the
NPDES program. [PAG-13]’
Parsing: A process in which land area is removed from a Planning Area in order to calculate the
actual or target pollutant loads that are applicable to an MS4. [NPDES from Small MS4 PRP
Instructions- Attachment A]
Planning Area: All of the storm sewersheds that an MS4 must calculate existing loads and plan load
reductions for. [NPDES from Small MS4 PRP Instructions]
Pollutant: Any contaminant or other alteration of the physical, chemical, biological, or radiological
integrity of surface water which causes or has the potential to cause pollution as defined in section
1 of The Clean Streams Law, 35 P.S. § 691.1. [PAG-13]
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Storm Sewershed: The catchment area that drains into the storm sewer system based on the surface
topography in the area served by the storm sewer. (Source: NPDES Stormwater Discharges from
Small MS4s General Permit [PAG-13]
Stormwater: Runoff from precipitation, snow melt runoff and surface runoff and drainage.
“Stormwater” has the same meaning as “Storm Water.” (Source: NPDES Stormwater Discharges from
Small MS4s General Permit [PAG-13]
Urbanized Area (UA): Land area comprising one or more places (central place(s)) and the adjacent
densely settled surrounding area (urban fringe) that together have a residential population of at least
50,000 and an overall population density of at least 1,000 people per square mile, as defined by the
United States Bureau of the Census and as determined by the latest available decennial census. The
UA outlines the extent of automatically regulated areas. UA maps are available at:
http://www.epa.gov/npdes/stormwater/urbanmaps,
or at: http://www.epa.gov/enviro/html/em/index.html. [PAG-13]
Appendix A
Public Comment and Responses
Appendix B
Developed Land Loading Rates for PA Counties
Appendix C
Supporting Calculations
MUNICIPALITY: Spring Township
RECEIVING WATERS: Logan Branch/Chesapeake Bay
COUNTY: Centre
Developed Land:
Land Use1 Area (ac) % Impervious2 Impervious Area (ac) Pervious Area (ac)
Developed, Open Space 57.73 19 10.97 46.76
Developed, Low Intensity 63.65 49 31.19 32.46
Developed, Medium Intensity 1.18 79 0.93 0.25
Developed, High Intensity 100
Hay/Pasture 14.09 0 14.09
Cultivated Crops 6.85 0 6.85
Decidous Forest 17.28 0 17.28
Total 160.78 43.09 117.69
Conversion from NLCD 2011 Land Use Designation to Impervious and Pervious Areas
1. NLCD 2011 Land Use and Areas
2. Highest % of impervious used from each NLCD 2011 definition per PADEP
CEDARVILLE Engineering Group, LLCSustaining Communities by Design
MUNICIPALITY: Spring Township
RECEIVING WATERS: Logan Branch/Chesapeake Bay
COUNTY: Centre
Developed Land:
Land Use Area (ac)
TN
(lbs/ac/yr)
TP
(lbs/ac/yr)
TSS [Sediment]
(lbs/ac/yr) TN (lbs/yr) TP (lbs/yr)
TSS [Sediment]
(lbs/yr)
Impervious,Developed 43.09 19.21 2.32 1,771.63 827.76 99.97 76339.54
Pervious, Developed 117.69 18.52 0.61 215.84 2179.62 71.79 25402.21
3,007.38 171.76 101,741.75
Existing Loads using PRP Loading Rates
Pollutant Loading Rates1 Pollutant Load
Logan Branch Total Pollutant Load
CEDARVILLE Engineering Group, LLCSustaining Communities by Design
BMP NAME: Steeplechase Basin Retrofit
MUNICIPALITY: Spring Township
RECEIVING WATERS: Logan Branch/Chesapeake Bay
COUNTY: Center
RETROFIT CLASS: Existing BMP Conversion
LOCATION: Axemann Rd and Steeplechase Dr
GPS LOCATION: Lat: 40.8725/ Long: -77.7584
TOTAL DRAINAGE AREA TREATED (ac): 82.21
TYPE OF BMP: Ex. Surface Basin to be retrofitted with Outlet Structure Modification
CLASSIFICATION OF BMPs BASED ON RUNOFF REDUCTION CAPABILITY: Runoff Reduction Practice (RR)
Amount of Runoff Volume treated (in) = RS x 12 where:
IA RS = Runoff Storage Volume (ac-ft)
IA = Impervious Area (ac)
Impervious area treated (ac) Runoff Storage Volume (ac-ft)
Amount of Runof Volume
treated (in) TN (%) TP (%)
TSS [Sediment]
(%)
14.27 0.277 0.233 28 32 34
Pollutant Load to Steeplechase Basin Retrofit:
Land Use Area (ac) TN (lbs/ac/yr)
TP
(lbs/ac/yr)
TSS
[Sediment]
(lbs/ac/yr) TN (lbs/yr)
TP
(lbs/yr)
TSS
[Sediment]
(lbs/yr)
Impervious,Developed 14.27 19.21 2.32 1,771.63 274.13 33.11 25281.16
Pervious, Developed 67.94 18.52 0.61 215.84 1258.25 41.44 14664.17
Total 1,532.38 74.55 39,945.33
TN (lbs/yr) TP (lbs/yr)
TSS
[Sediment]
(lbs/yr)
429.07 23.86 13581.41Pollutant Load reduced with Steeplechase Basin Retrofit:
Note: It was assumed that the since the basin was dry even with no low flow orifice, the soils beneath the basin have naturally good infiltration rate and do not require an infiltration bed. The basin outlet structure must
be modified to detain runoff from the stormwater quality design storm for extended periods. Since the 13" orifice is a very big for water quality improvements, we will be suggesting to reduce the size of the orifice to 6"
by utilizing a steel plate. Furthermore, water quality benefits were assumed minimal as the basin was only designed for peak flow control, the existing basin has zero removal rate.
Efficiency Rates for Stormwater Retrofit Projects using Cheasapeake Bay Panel Report
Projected Removal Rates
Pollutant Pollutant Load
CEDARVILLE Engineering Group, LLCSustaining Communities by Design
MUNICIPALITY: Spring Township
RECEIVING WATERS: Logan Branch/Chesapeake Bay
COUNTY: Centre
TN (lbs/yr) TP (lbs/yr)
TSS
[Sediment]
(lbs/yr)
Steeplechase BMP Conversion 82.21 429.07 23.86 13581.41
Total 82.21 429.07 23.86 13,581.41
TN (lbs/yr) TP (lbs/yr)
TSS
[Sediment]
(lbs/yr) TN (lbs/yr) TP (lbs/yr)
TSS [Sediment]
(lbs/yr) TN TP
TSS
[Sediment]
Logan Branch/Chesapeake Bay 160.78 3010.00 171.91 101,834.20 2580.93 148.05 88252.79 14% 14% 13%
Total 160.78 3,010.00 171.91 101,834.20 2,580.93 148.05 88,252.79 14% 14% 13%
Pollutant Load Reduction by BMPs
BMP Name BMP Drainage Area (ac)
Pollutant Reduction by BMPs
Receiving Waters Storm sewershed Area (ac)
Existing Pollutant without BMPs Pollutant Load with BMPs % Reduction
CEDARVILLE Engineering Group, LLCSustaining Communities by Design
Appendix E
Proposed BMP Map
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DISCLAIMER:This product is for informational purposes and may not have been prepared for, or be suitable for legal, engineering, or surveying purposes. Users of thisinformation should review or consult the primary dataand information sources to ascertain the usability ofthe information.
Spring Township,Centre County,
PennsylvaniaCEDARVILLEEngineering Group, LLC
POLLUTANT REDUCTION PLANPROPOSED BMP
Steeplechase Basin Retrofit
MAP UPDATED: JUNE 2017
1 inch = 300 feet
Legend#VMS4 Outfalls
Proposed BMPsDrainage AreaStorm Sewersheds/Planning Area
Stormw ater Structures") Inlet, Township!( Manhole, TownshipW Inflow, Tow nshipXWOutflow, Township") Inlet, State!( Manhole, StateW Inflow, StateXWOutflow, State") Inlet, Private!H Riser, PrivateW Inflow, PrivateXWOutflow, PrivateStormw ater Conveyances
Pipe, TownshipSwale, Tow nshipPipe, StatePipe, PrivateSwale, PrivateImpaired StreamsNon-Impaired Streams
RoadsTownshipPENNDOTPrivateIndex ContoursParcelsTow nship Boundary
NOTES:
1. Drainage area to the proposedBMP equals the storm sewershed/planning area.
2. Property Owners: -Steeplechase HOA 13-529
Appendix F
Storm Sewershed/Land Cover Map
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E COL LEGE AVE
N MAIN ST
JOD ON AVE
DA NIE LLE DR
WEAVER HILL RD
BIRCHWOOD LN
MILMARCIR
AXEMANN RD
OBSIDIANC
T
MIDDLEST
S LATECT
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JAS P E
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CT
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KIA
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LN
MA R B
L E
LN
PINOAK
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PATRICIA LN
SHEPHERD LN
LIGHTHOU SELN
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SPRUCEST
N HARRISON RD
KELL
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ELM ST
RACHEL DR
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JENN IFER
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MELANIE LN
BROOKS
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GRANITE DR
SHARRISON
RD
BILGER AVE
SLATE CT
FLINT CT
BLANCHARD ST
HERMAN ST
CLOVER LN
STEEPLECHASED R
CHAPEL
HILLC IR
WHITMAN AVE
N DANIELLE DR
MIDDLE ST
HEATHER
CIR
W HI T MAN CIR
HARVEY ST
C OLB Y CIR
SR26 HWY
ROBINSON LN
FA LC O NLN
GR I FFITH LN
NVA
NESS
ADR
TAMARA
CIR
SANDRA LN
OAK ST
RACHEL DR
RHOADS DR
MANN RD
OBSIDIA N CT
LOCUST ST
QUARTZ DR
SR26 HWY
SHADY HOLLOW DR
ARBOR BLUFF DR
BLUEBIRD LN
IRISH HOLLOW RD
AXEMANN RD
ON THE HILL RD
GEMAR AVE
LIMESTONE DR
GETTIG L N
I99S80ON RAMP
I99N80OFF RAMP
I99N81ON RAMP
RISHEL HILL RD
STONE Q UARRY RD
I99S81OFF RAMP
I99NI99S
I99N81OFF RAMP
E ROLLING RIDGE DR
I99S81ON RAMP
WITHERITE RD
Loga
n Bran
ch
BENNER TWP
820
1070
990
1070
980
1010
850
1260
900
930
1070
1100
920920
900
1110
1000
810
1040
1100
1200
1090
960
950
880
1070
940
1080
830
1000
1060
990
950
1050
1100
1030
1100
980
1040
1020
1300
820
910
970
830
1190
980
900
1140
1050
1010
950
1020
950
920
1080
870
940
1050
1030
121084
0
930
1050
1220
970
1100
860
850
1090
860
910
1060
1000
1090
860
930
930
890
1110
1050
980
930
980
1080
990
1080
1220
1180
900
1020
1040
1010
1060
1200
1060
960
1300
1090
1060
1000
1010
1030
1000
950
1010
1070
850
1010
1050
1090
1050
970
900
1030
980
990
990
1050
1010
910
1020
990
1040
1070
970
990
1090
1010
1080
870
1080
990
960
990
930
1060
970
930
1050
1040
880
1100
1030
1020
1100
1020
980
1050
830
990
1000
1000
1060
1030
1000
1090
1050
1010
820
940
960
940
1060
1000
980
990
1030
1020
1090
1000
990
940
1390
900
1040
1060
1060
1010
990
850
990
1080
1050
980
9101030
1000
1090
1010
950
1050
920
1050
1050
990
1060
1070
980
1000
1000
1090
1050
1040
1050
970
940
990
980
1020
960
1040
1020
1050
880
830
1030
1040
1040
1030
1030
1070
980
1060
1040
1000
1060
1210
990
10301030
840
1110
1230
1090
1080
1010
1020
990
1220
1040
940
1090
1010
960
990
1010
1020
1090
970
1020
860
990
1090
1010
1000
1020
1030
1070
1010
1060
1070
1110
860
1030
1080
930
1070
1000
1010
950
910
1060
1040
1000
10101050
1070
980
1000
1070
1010
840
1040
1100
1060
990
1010
1010
1010
1040
1100
990
1060
1020
1050
1060
1040
1070
1100
1010
1080
1070
1230
1110
1370
900
950
1000
1070
1090
10901080
1010
1100
1010
1300
1040
1070
990
960
1090
960
1060
1020
950
910
1030
810
1090103
0
1220
1360
1020
1110
1060
1050
1090
1100
860
1030
1040
880
1010
1000
820
1000
1010
1070
1200
910
1040
810
1350
1000
1020
960
970
1070
970
86010
90
810
1060
1040
1010
1000
1340
1060
1080
1040
1100
1150
870
1090
1060
990
1330
980
950
1110
1030
1000
1050
1030
1030
940
1000
960
1060
870
860920
1320
970
970
1020
980
1050
1090
1310
950
1030
930
1190
1060
990
850
1050
970
990
980
1090
1300
990
1040
840830
1020
940
1230
1300
1000
820
1020
1060
1130
1110
970
1120
990
960
1060
1040
960
950
1070
910
1290
1100
1010
980
1080
930
890900
1110
880
950
9401290
1060
1100
1090
1100
1010
1080
1050
1220
920970
1000
1070
1030
960
960
1050
1060
950
1050
940
1030
930920
1120
126012
50
10801020
1240
1080
1270 1280
1070
1230
1060
1180
1060
1140
1150
1050
1130
1060
1160
11701120
1110
1090
1100
1080
1030
1070
1060
960
940
950
990
1000
980
970
1030
1020
1010
1
1
3
4
5
6
7
2
1
3
6
5
7
4
2
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community
®
SPRIN
G TO
WNS
HIP
POLL
UTAN
T RED
UCTIO
N PL
ANPL
ANNI
NG A
REA/
LAND
COVE
R MAP
1 inch = 400 feet
CENT
RE CO
UNTY
, PA
DRAWN BY: AR
0 390195Feet
NOTES:1. Land cover data is derivedfrom the National Land CoverDatabase 2011 (NLCD 2011).
DISCLAIMER:This product is for informational purposes and may not have been prepared for, or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources toascertain the usability of the information.
Legend_̂Proposed BMP
#VMS4 OutfallsStorm Sewersheds/Planning Area
Land Cover21- De veloped, Open Space22- De veloped, Low Intensity23- De veloped, Medium Intensity41- De ciduous F ore st81- Hay/Pasture82- Cultivated Crops
Stormwater Structures") Inlet, Tow nship!( Manhole, Tow nshipW Inflow, TownshipXWOutflow, Township") Inlet, State!( Manhole, StateW Inflow, StateXWOutflow, Stat e") Inlet, Private!H Riser, Pr ivateW Inflow, Pr iva teXWOutflow, PrivateStormwater Conveyances
Pipe, Tow nshipSwa le, Tow nshipPipe, StatePipe, PrivateSwa le, Private
RoadsTow nshipPENNDOTPrivateImpaired StreamsNon-Impaired StreamsIndex ContoursExisting BMPsParcels2010 U rba nize d AreaTow nship Boundary
2010URBANIZED AREA
PROPOSED BMP
DEP MS4 AGGREGATED REQUIREMENTS TABLE