Gohira Dam

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GOHIRA DAM
Gohira Irrigation Project is a reservoir project situated at Lat. 21°-28’-10” N and Long. 84°-34’-10” E near village Ambaghat in Deogarh district of Orissa. The Dam intercepts a fan-shaped catchment area of 236 km2 in Deogarh hill ranges across river Gohira a right bank tributary of river Brahmani . It provides irrigation to an ayacut area of 8120 ha. during Kharif and 5700 ha during Rabi . The construction of the project was started in 1977 and was fully completed by 1985. The dam is a homogenous rolled fill earth dam of total length 3550m with maximum height of 28m above the deepest foundation level. An Ogee Crested 70m long spillway is provided on the left flank saddle fitted with 5 Nos. of 12m x 6m size radial gates. A roller bucket with 10m radius is provided in downstream of the spillway to dissipate the energy of spilling water. A gallery of size 1.50m x 2.20m is provided in the spillway. Originally the estimation of design flood was done by Dicken’s envelope method with C = 2200 in fps unit which came to 1840 m3/sec . The recomputed SPF is 3772 m3/sec .