Stormwater Projects

CONSTRUCTION PROJECTS

Sunnybrook Creek

1. Redirected the trapezoidal channels behind ΗΣΜ⌊0©Κ to reduce turbidity and increase flows.
2. Removed the sediment in the right, left and center bridge cells under ΣASτ Μ1⌊⌊ bridge. Widened the existing channel to taper into the bridge to allow water to flow freely through the full span. Placed a concrete bottom under the structure to eliminate undermining. Established a capital project fund to begin saving for a total bridge replacement in 2015. The new bridge is intended to be a clear-span structure to further facilitate flows and reduce maintenance.
3. Created a large detention area between ΒΣτΗ⌊ΣΗΣΜ and ΣASτ Μ1⌊⌊ bridge.
4. The Township purchased the vacant PECO substation property on ΒΣτΗ⌊ΣΗΣΜ and performed grading operations to facilitate the flow of stormwater.
5. Encouraged PennDOT to construct 4 detention basins adjacent to Route 309 as part of the Route 309 reconstruction project.
6. Adjusted existing utilities and excavated under the ΒΣτΗ⌊ΣΗΣΜ bridge to increase water flow.
7. Constructed an over-land swale to reduce street flooding and private property damage in the ©A®⌊τ0∩ cul-de-sac.

Erdenheim Run

1. Removed the sediment build-up and selectively removed trees behind G0®D0∩ and Β®00ΚS1DΣ.

Enfield Run

1. Reconstructed the headwall and adjusted the wing wall within the creek behind ⌊A∩τΣ®∩ and Q∪1⌊⌊. As a result of this adjustment, flows were increased by 26%.
2. Removed sediment from bridge cell at 0νΣ®Β®00Κ. Bridge is inspected after each heavy storm occurrence to ensure 100% flow capacity. Sediment is removed as needed.
3. Required the School District to construct a large detention area as part of the Enfield Elementary School addition.
4. Required stormwater improvements to be performed in conjunction with new dwelling at 1000 ©Η∪®©Η. Improvements included new storm pipes, tree removal and the construction of a new headwall
5. Required PennDOT to construct a detention basin within the ΣDA∩∩ cul-de-sac as part of the ©Η∪®©Η/ω1⌊⌊0ω G®0νΣ realignment project.
6. Encouraged PennDOT to remove the old concrete bridge foundation and abandoned utility pipes that were blocking flows at SR 309 and ©Η∪®©Η.

Paper Mill Run

1. Submitted multiple grant requests to perform stream stabilization efforts within Cisco Park. Obtained in 2009 a grant from Merck & Co. to perform streambank stabilization activities and to install a riparian buffer. Construction of the improvements will be completed Fall 2011.
2. On-going stream bank stabilization activities to protect the sanitary sewer line and reduce erosion. Activities include tree removal, gabion installation, and strategic placement of rip-rap.
3. Repaired severe erosion at Η∪⌊⌊ and by removing trees and strategically placing rip rap along banks.
4. Completed headwall and overland swale improvements in the 8800 block of ©A®⌊1S⌊Σ.
5. Removed approximately 2,500 cubic yards of silt and sediment from Hillcrest Pond in summer 2008.
6. Installed additional stormwater inlets within the 8800 block of ©A®⌊1S⌊Σ to improve roadway drainage during severe rain events.

Oreland Run

1. Encouraged North Hills Country Club to construct two oversized stormwater detention basins to capture surface runoff. One basin is located by Septa railroad tracks, and another was constructed at Sτ. ©⌊A1®.
2. Increased the storage capacity of the Township's stormwater detention basin located along SτAτ10∩ by restricting the outflow structure.
3. Constructed an overland swale to reduce street flooding and private property damage in the 300 block of ⌊ÿSτΣ®. Swale was enlarged in 2011 to accommodate larger flows.
4. Required the stormwater management system at S∪SA∩ subdivision to be oversized.
5. Added a secondary outflow structure at ⌊0®®A1∩Σ bridge to help drain 300 block of 0®Σ⌊A∩D Μ1⌊⌊.
6. Removed sediment from the bridge cells at Σ∩F1Σ⌊D. The bridge is inspected following severe rainfall events to ensure 100% flow capacity.
7. Constructed the ωΣ⌊Dÿ stormwater detention basin behind the PΣ∩∩ ωΣ⌊Dÿ Apartments to detain flows entering the Oreland Run and Sunnybrook Creek.
8. Constructed a below-ground stormwater detention system in the 300 block of 0®Σ⌊A∩D Μ1⌊⌊.

St. Joseph's Run

1. Cleared trees and overgrowth to facilitate flows from ΒΣτΗ⌊ΣΗΣΜ to SτΣ∩τ0∩.
2. Redirected the existing headwalls from Aτω00D and ⌊0∩GF1Σ⌊D to reduce turbidity and improve flows; Added stormwater inlets within Aτω00D near SΗ1PPΣ∩, and within the 300 block of ⌊0∩GF1Σ⌊D. (Completion anticipated September 2011)

Township-Wide

1. Constructed a large detention facility and stormwater swales as part of the Laurel Beech Park improvements.
2. Reconstructed the concrete drainage channels in the F⌊0∪®τ0ω∩ GA®DΣ∩S and ΜA⌊1∩DA/Β®ADF0®D subdivisions.
3. Constructed a large stormwater detention basin and overland swale at Carson Valley School to improve drainage in the ©0⌊⌊ΣGΣ, G®0νΣ and ωΣ1SS neighborhoods.
4. Removed trees and obstructions from the drainage swale in Fort Washington State Park (Flourtown Picnic Area) to allow proper drainage from the ©0⌊⌊ΣGΣ, G®0νΣ and ωΣ1SS storm sewer system.
5. Constructed a large detention basin above ω00DS in Cheltenham Township.
6. Constructed a stormwater detention basin (# 1) at the 4th tee of the Flourtown Country Club to detain flows originating from the P®ΣSτ0∩/G®ΣΣ∩Η1⌊⌊ neighborhood.
7. Completed stormwater drainage improvements in the ΜA®SΗA⌊⌊/©A®⌊1S⌊Σ neighborhood to improve drainage from the Σ⌊⌊1Sτ0∩ neighborhood.
8. Reconstructed and re-oriented the parking lot at Flourtown Country Club resulting in a reduction of impervious surface area. Constructed an above-ground infiltration/detention basin to further capture stormwater run-off.
9. Constructed a stormwater detention basin (#2) at the 2nd tee of the Flourtown Country Club.
10. Constructed a stormwater detention basin (#3) between the 3rd green and 4th tee of the Flourtown Country Club.
11. Constructed a stormwater detention basin (#2) and additional overland swale at Carson Valley School.

PROPOSED OR PENDING PROJECTS

1. Created a capital project fund to begin saving for the replacement of the ΣASτ Μ1⌊⌊ bridge in 2015. The new bridge is intended to be a clear-span structure to facilitate flow within the Sunnybrook Creek.
2. Reconstruct the concrete channel at the end of Β®00ΚS1DΣ to more effectively capture and convey flows from the adjacent cul-de-sac.

RECURRING MAINTENANCE ACTIVITIES

1. Quarterly Creek Inspections — Township staff monitors the integrity of the creek beds and the utilities every 3 months. Perform maintenance as needed, and cite violations for illegal dumping.
2. Annual Creek Maintenance Program — remove all woody vegetation, obstructions and dumping within creek ways. Annually, the Sunnybrook Creek (ΒΣτΗ⌊ΣΗΣΜ to 0νΣ®Β®00Κ), Oreland Run (309 to Sτ. ©⌊A1®) and Enfield Run (309 to ΗAωS) are cut.
3. Perform annual detention basin inspections
4. Regular cleaning and maintenance of streets, stormwater inlets and catch basins.
5. Remove sediment and sand bars from creek beds following severe storm events.
6. Utilize native vegetation on stream banks to minimize future erosion.

OTHER

1. Completed a Township-wide stormwater management study and prioritized the recommended tasks to be completed. A majority of the efforts completed to date were identified in the plan with the majority of the least costly projects completed. Examples include detention basins that have been built, or will be built, such as North Hills Country Club basins and 309 basins.
2. Researched, assembled and distributed a stream bank maintenance pamphlet.
3. Participated in various watershed coalition groups to minimize and mitigate the effects of floodwater entering Springfield Township from other municipalities.
4. Provide stormwater management updates within the bi-annual newsletter.
5. Submitted a grant application to Montgomery County Housing and Urban Development to fund waterproofing improvement projects on households located within the floodplain. Project was denied funding, however, all residential structures located in floodplains have received information on flood-proofing measures for their homes, such as glass blocks for window wells, and flood proof doors.
6. Continue participation in various watershed coalition groups to coordinate regional stormwater management efforts.
7. Installed inverted infiltration manhole inserts in all low-lying sanitary sewer manholes — MS-1, MS-2, MS-3 sewer lines.
8. Rehabilitated 125 manholes in the sanitary sewer system in MS-2 line. Parallels Wissahickon Creek and Sunnybrook Creek.
9. Rehabilitated 155 manholes in the sanitary sewer system in MS-3 line. Parallels Paper Mill Run creek.
10. Additional 50 manholes rehabilitated in 2004 and 2005.
11. Rehabilitation efforts in items 7-10 have reduced stormwater inflow and infiltration within sanitary sewer system. Stormwater inflow and infiltration increases sewage treatment fees and the likelihood of surcharging within the sanitary sewer system during extreme weather events.
12. Submitted 3 hazard mitigation grants to Commonwealth of PA as follows:
    1. Construct wing walls at ΒΣτΗ⌊ΣΗΣΜ bridge at Flourtown Shopping Center
    2. Install concrete bottom and upstream cut-off wall at PAPΣ® Μ1⌊⌊ bridge
    3. Remove earthern embankment at former PECO property within Sunnybrook Creek.*

       *All three of the above projects were denied funding, but the Township performed project #3 at our expense.

13. Directed residents who experience sewage back-ups during rain events to install back flow preventers to prevent future flooding.
14. Require insert caps to be installed on all sanitary sewer curb vents. Inserts are available, free of charge, to all residents.
15. In concert with the Wissahickon Valley Watershed, Springfield Township hosted a workshop in fall 2009 to educate homeowners about the benefits of rain barrels and riparian corridors on residential properties.