Dams

Huntington Hills Lake Dam Rehabilitation

10k

cubic yards excavation

16k

cubic yards controlled embankment

Anderson, SC

Rehabilitation of the existing dam which included the removal of the failed spillway structure, 10,000 CY of excavation, 16,000 CY of controlled fill embankment, 1,600 CY of cast-in-place concrete for a new labyrinth spillway, stone trench drain with PVC perforated and solid pipe, sand drainage layer, new cast-in-place outlet control structure with slide gates and trash racks, 40 LF of 42” DIP with concrete cradle from outlet control structure, Rip Rap plunge pool and lined channel downstream of spillway, temporary control of water, erosion control, final grassing and temporary erosion control matting.

This dam is classified as Category I High Hazard. Control of water was accomplished by a combination of a temporary coffer dam, creek diversion through 250 LF of temporary 36” HDPE pipe and several deep wells for control of ground water. 

Still Branch Reservoir

475

acre reservoir

950k

cubic yards embankment

42k

tons of aggregate drainage

Griffin, GA

475 acre reservoir; Earthen Dam “Category I Large Dam” – approx. 950,000 cy embankment; 100,000 cy of undercut; Outlet Structure; Drawdown Control piping; 65 ac wetlands mitigation; 1.5 mi paved roadway; 1.2 mi gravel roadway; 2,300 lf of 42” DIP & 1,900 lf of 30” DIP waterline; 735 lf of Pre-stressed Concrete Cylinder Pipe (PCCP); 540 ac of clearing; 110 ac of grassing; 9,000 tons of rip rap; 42,000 tons of aggregate drainage material. 

Stoney Creek Reservoir Dam Rehabilitation

Cat. 1

high hazard classification

2.9k

cubic yards reinforced concrete

20k

cubic yards excavation and backfill

Bedford, VA

Rehabilitation and reconstruction of the existing chute spillway including new sidewalls, parapet walls, cut-off walls, spillway crest, and chute slab overlay (approximately 2,900 CY of reinforced concrete); overtopping protection on the downstream side of the existing dam embankment consisting of 10,000 CY of roller-compacted concrete; sand blanket drain; stone trench drains including 2,500 LF of PVC perforated and solid pipe; 20,000 CY of excavation and backfill; Rip Rap channels; water line relocation; sheet piling; pressure injected grout; piezometers.

This dam is classified as Category I High Hazard. Control of water was handled by drawing down the existing lake, cofferdam installation at the crest of the existing spillway and localized pumping to mitigate ground water. A Rapidmix 600 pugmill mixer was used to mix the RCC. The RCC was transported via articulated dump trucks discharging into a Gomaco material transfer devise, which fed a stacker conveyor belt. A telescoping crane was used to receive the RCC and conveying it to the final placement location.