the dam's hydroelectric power station to full capacity. According to the Coalition Provisional Authority, the inauguration of this turbine on 3 June 2004 signified the first time since 1990 that the power station operated at full capacity. In the same year, a new power line was established between Haditha and Baghdad with the help of the USACE to restore a line that had previously been destroyed. This new line, stretching over a distance of with 504 towers, has an operating voltage of 400 kV and allows 350 MW of power from the Haditha Dam to be added to the national electrical grid. The cost of the line was US$56.7 million and was paid by Iraq's oil revenues. Characteristics of the dam and the reservoir The dam is situated in a narrow stretch of the Euphrates Valley where a small secondary channel branched off the main channel. The width of the main channel was whereas the secondary channel was wide. The hydroelectric station is located in this secondary channel. The Haditha Dam is long and high, with the hydropower station at from the dam's southern edge. The crest is at AMSL and wide. Total volume of the dam is . In cross-section, the dam consists of an asphaltic concrete cutoff wall at its core, followed by mealy detrital dolomites, and a mixture of sand and gravel. These materials were chosen because they are readily available near the construction site. This core is protected by a reinforced concrete slab revetment on the upstream side of the dam, and a rock-mass revetment on the downstream side. The power station contains six Kaplan turbines capable of generating 660 MW. The turbines are installed in a hydrocombine unit that comprises both the spillway and the hydro-powerplant in one structure. Maximum discharge of the spillway is per second. Two bottom outlets on the dam can discharge per second for irrigation. Both these outlets and the spillway are controlled by tainter gates. The Haditha Reservoir or Lake Qadisiyah has a maximum water storage capacity of and a maximum surface area of . Actual capacity is however , at which size the surface area is . At maximum capacity, annual evaporation from the lake is estimated at . References External links Dams in Iraq Hydroelectric power stations in Iraq Dams on the Euphrates River Al Anbar Governorate Earth-filled dams Dams completed in 1987 Iraq–Soviet Union relations 1987 establishments