Chashma Barrage was constructed under the umbrella of Indus Basin Replacement Works. It is located on river Indus about 56 Km downstream of Jinnah Barrage. It’s purpose is to supply water to CJ-Link Canal on the left and Chashma Right Bank Canal on its right side. Un-like other barrages, a small storage reservoir has been provided at the Barrage to re-regulate the supplies of Tarbela reservoir. Two head regulators, one for CJ-Link Canal and the other for CRBC exist on the left and right banks respectively.
A Fish Ladder and Navigation Lock have also been provided. A low head hydel power station has been constructed in 2001 on the right side of Chashma Barrage.
Financing of Indus Basin Project was made by the World Bank and the other donors were Govt. of Australia, Canada, Germany, Newzeland, United Kingdom & USA respectively.
The Contractor for Chashma Barrage works was awarded to French Consortium Societe Dumez and Societe Borie.
LENGTH BETWEEN ABUTMENT 3556 ft.
TOTAL BAYS 52 Nos. (11 Under sluice & 41 Nos. Standard Bays)
Max. STORAGE LEVEL 649 ft
MAX. DESIGN DISCHARGE 950000 cusecs
AREA RESERVOIR 139 mi2
INITIAL CAPACITY 0.870 MAF
PRESENT CAPACITY 0.3482 MAF (As per Hydrographic Survey-2012)
COMPLETION COST Rs.399 Million
DATE OF COMMENCEMENT 10th February, 1967
DATE OF COMPLETION 25th March, 1971