PROJECT PROFILE:
Reconstruction and Improvements of Two Earthen Embankments at Panola Mountain State Park
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Project Overview
Construction of improvements to Upper and Lower Lake Dams in Panola Mountain State Park. Project consisted of complete removal of Lower Lake Dam and undercutting of new dam area to weathered rock.
Approximately 48,000 CY of earth and alluvial material was removed, and a new embankment was constructed with approximately 75,000 CY of select fill material, which included an internal drain system, 30″ concrete encased low level pipe, and 40′ wide cast-in-place concrete labyrinth weir spillway. Upper Lake Dam improvements consisted of undercutting of upstream and downstream toes of existing dam. Approximately 38,000 CY of alluvial material was removed and replaced with 83,000 CY of select material, and included an internal blanket drain, 30″ concrete encased low level pipe, and a 40′ wide cast in place concrete labyrinth weir spillway with vehicular bridge. All undercutting operations required subsurface dewatering by way of well points. Project required water control dewatering and bypass pumping of feeder stream.