Little Crum Creek BMP Sites - Preliminary Recommendations

1. Site: Springfield Square
   Map of Location in Watershed (click to view - site outlined in red)
   Aerial Image of Site (click to view - site outlined in red)
   Coordinates - Latitude: 39d_54m_48.53s NORTH, Longitude: 75d_20m_3.14s WEST
   Elevation: 200 ft
   Hydrologic Zone: headwaters
   Riparian? : yes
   
   • BMP: Green Roof
     Infiltration? : no
     Contributing Area: 2.4 (acre)
     Benefits:
     • Volume Reduction
     • Energy Savings
     • Heat Island Reduction
     • Flood Frequency Reduction
     • Location: Cresson Lane, Springfield
     • Location: Georgetown Road, Ridley Twp
   Comment: Green roof is ideally suited for large flat roofs.
   • BMP: Bioretention
     Infiltration? : yes
     Contributing Area: 14.7 (acre)
     Benefits:
     • Volume Reduction
     • Groundwater Recharge
     • Pollutant Washoff Reduction
     • Flood Frequency Reduction
     • Location: Cresson Lane, Springfield
     • Location: Georgetown Road, Ridley Twp
   Comment: Parking lot well suited for bioretention islands with infiltration since located in headwaters. Recent (July, 2009) addition to lower parking lot covers old stormwater detention basin visible in the image. Detention basin was replaced by concrete retention box under parking lot extension adds capacity to hold 1 foot of depth encouraging infiltration of a portion of the water quality volume.
2. Site: Farmhouse Circle / PECO Training Facility
   Map of Location in Watershed (click to view - site outlined in red)
   Aerial Image of Site (click to view - site outlined in red)
   Coordinates - Latitude: 39d_54m_7.31s NORTH, Longitude: 75d_20m_9.03s WEST
   Elevation: 112 ft
   Hydrologic Zone: headwaters
   Riparian? : yes
   
   • BMP: Constructed Wetland
     Infiltration? : yes
     Contributing Area: 52 (acre)
     Benefits:
     • Volume Reduction
     • Groundwater Recharge
     • Enhanced Evapotranspiration
     • Pollutant Washoff Reduction
     • Flood Frequency Reduction
     • Location: Georgetown Road, Ridley Twp
     • Aesthetics Enhance Property Value
   Comment: Convert dry detention basin at Farmhouse Circle into small constructed wetland with infiltration and evapotranspiration and install constructed wetland on PECO training facility at southwest corner of property.
3. Site: Low Intensity Residential Neighborhoods
   Map of Location in Watershed (click to view - site outlined in red)
   Aerial Image of Site (click to view - site outlined in red)
   Coordinates - Latitude: 39d_54m NORTH, Longitude: 75d_19m WEST
   Elevation: 140 ft
   Hydrologic Zone: headwaters and lowlands
   Riparian? : partially
   
   • BMP: Disconnect Downspouts from Storm Sewer
     Infiltration? : yes
     Contributing Area: 142 (Acres)
     Benefits:
     • Runoff Volume Reduction
     • Water Quality
     • Pollutant Washoff Reduction
     • Enhanced Evapotranspiration
   Comment: Develop a program in the Township to encourage and subsidize private residential land owners to install rain barrels and rain gardens and to connect roof gutters and other drains to them while disconnecting them from the storm sewer system.