Kouhrang 1 Dam

32°26′10.97″N 50°06′04.48″E / 32.4363806°N 50.1012444°E / 32.4363806; 50.1012444PurposeWater supplyStatusOperationalConstruction began1948Opening date1954Dam and spillwaysType of damGravity, masonryImpoundsKouhrang RiverHeight10 m (33 ft)Length70 m (230 ft)

The Kouhrang 1 Dam is a masonry gravity dam on the Kouhrang River about 4 km (2.5 mi) southwest of Chelgard in Chaharmahal and Bakhtiari Province, Iran. The primary purpose of the dam is to divert up to 320,000,000 m³ (260,000 acre⋅ft) of water annually via the 2.8 km (1.7 mi) long Kouhrang 1 Tunnel to the Zayandeh River to the east where it would help supply cities like Isfahan with water. Since the era of Shah Abbas I, attempts had been made to diver the Kouhrang to the Zayandeh. Eventually, efforts by Alexander Gibb between 1948 and 1954 led to the completion of the Kouhrang 1 Dam and Tunnel.^[1][2][3]

• 
  water entrance in Kouhrang tunnel
• 
  Kouhrang dam in summer

• Kouhrang 2 Dam – downstream, feeds water into the Kouhrang 2 tunnel
• Kouhrang 3 Dam – under construction downstream, feeds water into the Kouhrang 3 tunnel