Chashma Barrage

Chashma Barrage
Location of Chashma Barrage in Pakistan
Location	Chashma, Mianwali District
Coordinates	32°26′02″N 71°22′44″E / 32.43389°N 71.37889°E / 32.43389; 71.37889Coordinates: 32°26′02″N 71°22′44″E / 32.43389°N 71.37889°E / 32.43389; 71.37889
Purpose	Irrigation, power
Status	Operational
Construction began	1967
Opening date	1971
Construction cost	Rs 399 million
Owner(s)	WAPDA
Dam and spillways
Impounds	Indus River
Height	11.28 m (37 ft)
Length	1,084 m (3,556 ft)
Spillway capacity	870,000 m3/s (31,000,000 cu ft/s)
Power station
Hydraulic head	4.8 m (16 ft) (rated)
Turbines	8 x 23 MW Kaplan-type turbines
Installed capacity	184 MW
Annual generation	675 GWh

Chashma Barrage is a barrage on the River Indus in Mianwali District of the Punjab province of Pakistan 304 km NW of Lahore and 56 km downstream of Jinnah Barrage. The contract for Chashma Barrage works was awarded on 10 February 1967 to French Consortium Société Dumez and Société Borie and was successfully completed by 25 March 1971. The total cost of Chashma Barrage works was Rs.399 million but power generation started later in 2001. The installed capacity of power Station is 184 MW, from eight Kaplan-type bulb turbine units each with a 23 MW capacity. The bulb turbines have been installed for the first time in Pakistan. The first unit was commissioned in January 2001, while final commissioning of all units was completed in July 2001. The 8 Kaplan-type turbines and synchronous generator units were made by Fuji, Japan.

Chashma Barrage is used for irrigation, flood control and power generation. A Ramsar site is located nearby.

Length between abutments: 3556 ft.
Total Bays: 52
Standard Bays: 41
Undersluce Bays: 11
Normal Pond Level: 642 ft
Maximum Storage Level: 649 ft.
Maximum Flood Discharge: 950000 Cusecs
Maximum Intensity of Discharge: 300Cs. Per ft.
Width of Carriage Way: 24 ft.
Length of Navigation Lock: 155 ft.
Width of Navigation Lock: 30 ft.
Area of Reservoir: 139 square metres.
Initial Capacity: 0.87 MAF
Contract Price: Rs 399 Million
Date Commencement: 10 February 1967
Date of Completion: 25 March 1971
Contractor: Societe Dumes Enterprises Borie of France
Consulting Engineer: COODE & Partner London