Tenders are invited for Conducting under water scanning and plugging of suction holes on upstream face
of markandeya dam .
The lag of the phreatic line depends on factors such as: permeability of soils, drawdown rate, drawdown ratio and slope gradient during rapid drawdown, the stabilizing effect of the water on the upstream face
is lost, but the pore-water pressures within the embankment may remain high.
According to The Associated Press, a preliminary accident report issued by MSHA said a massive failure of the upstream face
of the saddle dam for the Nolans Run Slurry Impoundment happened at the Robinson Run mine.
After each four-hour test, more deposited dust was observed on the down-stream face of each heat exchanger than on the upstream face
To avoid lowering the reservoir or building a coffer dam, the tower is to be constructed onshore, then floated into place for installation near the upstream face
of the dam.
In the near future, the Corps plans to inspect the structural condition of the Lusk Reservoir Dam's upstream face
using a dive team because this portion of the structure needs to be visually examined.
The project team developed an environmentally sensitive and value engineering approach comprising grout-filled mattresses to the upstream face
of the weir, placed by divers, tied into a new reinforced concrete crest beam.
Removing and replacing the concrete over the upstream face
of the dam - $472,000;
Construct a 12 m raise to the existing embankment continuing the soil liner from the basin into the upstream face
of the embankment and expanding the basin liner and hydraulic break to accommodate the raise
During a 1971 earthquake, a large part of the upstream face
of the 140-foot Lower Van Norman San Fernando Dam in California collapsed and slipped beneath the water.
2 miles long and 90 feet tall at its highest point with a soil bentonite cutoff trench in the foundation and the upstream face
of the dam protected by soil cement.
The combination of the lowered lake and the placement of the liner was effective in providing a "dry" condition between the cofferdam and the upstream face
of the spillway where the investigation and repair work was to be done.