The invention relates to the field of hydraulic engineering, and can be used in the construction of dams against catastrophic floods and dam spillway. The proposed utility model solves the problem simplify the design and reduce the cost of its cost. To achieve said technical result of the proposed dam comprising a dam body and a water discharge device in the form of niches, new is that the dam body is made of rock located between the rocks, and additional water discharge device are designed as troughs arranged in the rock below the surface dam. The dam body in place niche can be inclined pipe, which is installed at the outlet valve, and a flexible hose connected with the inlet check valve installed inside the limiter trehnozhnogo not to suck yl. The check valve is attached to the floating body and twine 5-8 meters attached to the stone dam, so that the valve is not toppled when the water level rises above the level of the pipe. At the highest point of the pipe is installed with the gate funnel for air leaks. The valve outlet pipe is installed below the bottom of the reservoir. At the outlet pipe before the valve is advisable to install a branch pipe with a valve for irrigation. If on-site installation of the dam the river flows, it is advisable to carry out a niche in the form of a pipe with a valve at the inlet. The proposed combination of features provides a simple construction of the dam and its cheapness.
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