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PENN STATE UNIVERSITY DUCK POND
Challenge
The Duck Pond at Penn State University had served as a popular recreation spot in the community for more than 70 years, but severe erosion of the inlet channel was undermining an adjacent access road to the wastewater treatment plant. In addition, the channel erosion was also causing sediment deposition into the Duck Pond and receiving streams.
Solution
HRG completed hydraulic and hydrologic studies to evalute various alternatives for stabilizing the streambank and designed a variety of improvements, including:
- a rip-rap apron energy dissipator at the storm sewer outfall,
- vegetated banks,
- dredging of 11,250 cubic yards of sediment from the Duck Pond, and
- improvements to the floodplain.
Detailed hydrologic and hydraulic models were developed to find a way to achieve a sensitive temperature balance …
A perennial spring in the area combined with the Duck Pond's overflow into a natural trout stream east of the pond that is a tributary to Spring Creek. This spring helped maintain the cool temperatures needed to maintain trout in the stream, so minimizing the frequency with which the warm inlet channel water and cool spring water mixed was a primary concern. Therefore, we developed detailed hydrologic and hydraulic models of the area to mimic flow scenarios under each of the proposed design alternatives. |
