Kapur staff provided design quality management for the design-build team working for the U.S. Division of Forestry - Department of Fish and Wildlife Management (F&WL).
Our staff wrote the proposal for the design side of the project, developed the work breakdown structure and priced the design side of the project, formed the multi-disciplined design team, and was charged with maintaining continuity throughout the entire design process.
The project delivered the removal, redesign, and replacement of multiple water control structures and levees to allow for the systematic flooding and draining of approximately 200 acres to attract animals and then allow for regrowth. The project site has Bass Creek flowing through it and is within a series of dams and levees that already controlled the flow of water, to a degree.
Before construction, water levels on one side of the levees were rising too fast and caused severe erosion and failure of the levees due to overtopping. The levees were redesigned and armored, and the spillways and drainage structures (36-inch culvert and 12-foot by 6-foot reinforced concrete box) were redesigned as flashboard risers with debris grates and access walkways. This design allowed for control of the water surface elevation within the designated project area so that when flooding the area, the water level could be brought up at equal elevations on each side to prevent the flow of water over the levees.
Flow data and simulation results from the existing upstream watershed was obtained in HEC-DSS and our new data was incorporated into it run through HEC-HMS to simulate and analyze the complete hydrologic process. We had to add intake pools and plunge pools to the flow control structures to prevent scour at their ends and limit the buildup of debris near the entrances.
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