Spillway Dam Construction Launched

Stroytransgaz Group operates construction of Bagaevsky Hydroelectric Complex — one of the largest transport facilities in Rostov Region. Construction site is prepared for spillway dam erection. 

Spillway dam is designed to release flood waters from natural reservoir as well as for beneficial releases of water to the bottom race. Larsen L-350 sheet piling is currently being driven into the pit for construction of this dam using excavator with attached vibratory loader. Sheet pile depth is minus 12.35 m. 578 pcs are planned to be driven in total. The total length of sheet piling is 289 linear metres.

The resulting row will serve as a base for reinforcing and concreting of the reinforced concrete capping that is about 1 m high and 1 m wide. Then bituminous mastic will be poured for waterproofing. This structure will form the base for spillway dam flood bed.

As the design level of the pit bottom is below the normal level of the Don River, it is necessary to pump water out of the pit during operations.

The construction state owner is the Federal State Unitary Enterprise Rostransmodernizatsiya.

For reference:

Race is an area where the water surface adjoins the hydraulic structure. The head race is upstream the river, the tail race is downstream.

Flood bed is an artificial bed for running water flow.

Project background:

Bagayevsky Hydroelectric Complex is the most important infrastructure project not only for the Rostov region, but also for the whole country. The hydroelectric complex under construction will be composed of a shipping lock with a central control room, upper and lower approach channels with mooring-guiding structures, a spillway and earth fill dam, a meandering fish bypass and spawning channel and a fish passage lock, industrial, service, engineering and auxiliary facilities, and housing for operating personnel. To ensure the navigation safety, channel-regulating dams are being constructed, as well as shore protection dams that will prevent the development of bank erosion processes (washout and collapse), protect from the impact of ship waves and reduce the negative impact of waters on the population living in these areas. In order to ensure guaranteed waterway dimensions (depth — 4 m, width — 80 m, bending radius — 500 m) in the section from the Kochetovsky Hydroelectric Complex site at the 3004.5 kilometre mark of the waterway of the Integrated Deep Water System (IDWS) to the Bagaevsky Hydroelectric Complex site at the 3089 kilometre mark of the IDWS waterway, dredging and river cut-off are envisaged.