PIER Company - leading engineering & construction company
Menu
noshan-dam

noshan Dam & Hydroelectric Power Plant Project

Location noshan
Client Iran Water & Power Resources Development Co.
Consulting Eng. cowi
Contractor Pier Group construction Co.

Location of project

noshan and Kashkan rivers are the tributaries of Karkheh river, and they supply it from its upper catchment area. noshan river with a length of 417 km and slope of 3% is formed by the combination of Qarasu and Gamasb rivers. The most important branches of noshan river are Chardaval and noshan.

noshan dam site is located 106 km southeast of shiraz city, 40 km northwest of Dareh Shahr city, and 7.5 km from noshan village. noshan Hydroelectric power plant site is located opposite Talkhab village, and 1.5 km from the dam site. The annual natural mean discharge rate of noshan river is 109.5 m3/s.

Purpose of project

The purpose of constructing noshan dam and hydroelectric power plant is to generate hydroelectric power, to control surface water resources, and to supply the downstream area with the water rights.

General data of project

Project: Construction of dam, U/S cofferdam, D/S cofferdam, and the ancillary structures.
Client: Iran Water & Power Resources Development Co.
Consulting Engineers:
Contractor: Pier Group construction Co.

  1. Data of dam body

noshan dam is a double arch concrete dam, with a height of 180 m, width of 25 m at the foundation, and width of 6 m at the crest. Its length is 220 m, number of blocks is 13, elevation of crest is 730.00 masl, volume of concrete is 650,000 m3, and volume of excavation is 500,000 m3.

As a result of a chute spillway being at the right bank, between dam body and spillway; a thrust block has been anticipated to convey the thrust forces of the arch dam to the abutments. The volume of the thrust block is 15,000 m3.

  1. Data of reservoir

Normal elevation of water at the reservoir is 720.00 m.a.s.l, minimum elevation of water is 705.00 m, max. elevation of water is 731.00 m, elevation of deposit is 622.00 m, and total volume of reservoir is 3215 million m3.

  1. Details of U/S and D/S cofferdams

U/S cofferdam is an earth fill structure, with a clay core, width of crest 10 m, width of clay core at crest 4 m, and height of 24 m. The D/S cofferdam is an earth fill structure, width of crest 5 m, and height of 12 m from the rock bed.

  1. Data of spillway

Gated spillway with 2 gates, elevation of gated spillway inlet 704.5 m.a.s.l, height of gated spillway inlet 18 m, 2 radial gates, discharge rate of gated spillway 5800 m3/s, 2 bottom outlets, with elevations of 620.00 and 640.00 masl, and total discharge rate of 1240 m3/s, number of free spillway gates on the dam crest is 4, number of grout galleries is 8, and total length of grout galleries is 2880 m.

noshan concrete dam which is considered one of the largest dams in Iran is now under construction and in compliance with the highest standards of quality for such dams.