685-G Par Pond and 686-G L-Lake Sluice Gate Conduit Cleanouts/Inspections CX(s) Applied: B1.3 Date: 03/21/2013 Location(s): South Carolina Offices(s): Savannah River Operations Office
Office of NEPA Policy and Compliance
March 21, 2013
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685-G Par Pond and 686-G L-Lake Sluice Gate Conduit Cleanouts/Inspections
CX(s) Applied: B1.3
Date: 03/21/2013
Location(s): South Carolina
Offices(s): Savannah River Operations Office
The purpose of this activity is to perform gate checks and clear weeds and other debris from the conduits at Par Pond Dam and Steel Creek Dam (L-Lake), in part to facilitate Federal Energy Regulatory Commission inspection requirements. This will be accomplished at Par Pond by opening the sluice gate and increasing the flow from the normal 10 CFS incrementally to a fully open flow of 2000 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 10 CFS. At Steel Creek Dam, this will be accomplished in the same manner except normal flow is 4.5 CFS and fully open flow will be 1400 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 may be collected to monitor sediment transport. Environmental impacts to the receiving streams are expected b be minimal and temporary.
CX(s) Applied: B1.3
Date: 03/21/2013
Location(s): South Carolina
Offices(s): Savannah River Operations Office
The purpose of this activity is to perform gate checks and clear weeds and other debris from the conduits at Par Pond Dam and Steel Creek Dam (L-Lake), in part to facilitate Federal Energy Regulatory Commission inspection requirements. This will be accomplished at Par Pond by opening the sluice gate and increasing the flow from the normal 10 CFS incrementally to a fully open flow of 2000 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 10 CFS. At Steel Creek Dam, this will be accomplished in the same manner except normal flow is 4.5 CFS and fully open flow will be 1400 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 may be collected to monitor sediment transport. Environmental impacts to the receiving streams are expected b be minimal and temporary.