686-G Steel Creek Dam (L-Lake) InspectionCX(s) Applied: B1.3Date: 04/16/2010Location(s): Aiken, South CarolinaOffice(s): Environmental Management, Savannah River Operations Office
Office of NEPA Policy and Compliance
April 16, 2010
Estimated Read Time min
CX(s) Applied: B1.3
Date: 04/16/2010
Location(s): Aiken, South Carolina
Office(s): Environmental Management, Savannah River Operations Office
The purpose of this activity is to perform gate checks and inspect the operating mechanisms of the gates at Steel Creek Dam (L-Lake). This will be accomplished by opening the sluice gate and increasing the flow from the normal 4.5 cubic feet per second (CFS) incrementally to a fully open flow of 1400 CFS. Flow will be increased by opening the sluice gate in stages of 50% per hour until the gate is fully open. The gate will remain fully open for 5 minutes, whereupon the gate will be closed to its normal position and flow of 4.5 CFS. After fully open flow for 5 minutes, the gate will be returned to its normal position, reestablishing the 4.5 CFS flow. During the periods of increased flow, water samples will be collected to monitor sediment transport. Any ecological impacts to the receiving stream is expected to be minimal and temporary. This activity at Steel Creek Dam involves opening each of the valves/gates 50% per hour until the maximum discharge flow rate of 1400 CFS is reached, then, after a duration of 5 minutes at the maximum flow rate, returning to normal flow by reclosing all valves.