Notice of Floodplain Statement of Findings for the East Fork Poplar Creek Flow Management Project for the Y-12 Site

摘要

This is a Floodplain Statement of Findings for the proposed East Fork Poplar Creek (EFPC) Flow Management Project, prepared in accordance with Title 10, Code of Federal Regulations (CFR), Part 1022. DOE proposes to maintain the flow of the EFPC at 7 million gallons per day by providing augmented flow from the Clinch River using an existing water intake pumping and piping distribution system. Because the added flow would be applied at a point discharge, turbulence would cause erosion and sedimentation problems in the EFPC. To eliminate this potential problem, an energy dissipation chamber would be installed alongside the creek to control the turbulence of the incoming flow. This chamber is a concrete box approximately 10 by 14 feet with a series of weirs. Water would flow into the box through a series of baffles which would dissipate energy and flow out over a rip-rapped channel to the creek. This chamber would be installed on the creek bank within the Y-12 Plant on the Oak Ridge Reservation in Oak Ridge, Tennessee. The action would be located within the 100-year floodplain of the EFPC located in Anderson County, Tennessee. DOE prepared a Floodplain Assessment describing the effects