Mangla reservoir, Pakistan – approaching 50 years of service

Author:

Ackers John1,Hieatt Michael1,Molyneux J. Dominic2

Affiliation:

1. Black & Veatch, Redhill, UK

2. Black & Veatch, Redhill, UK (corresponding author: )

Abstract

The first issue, dated May 1967, of the newsletter of the British National Committee on Large Dams, now the British Dam Society, contained a brief item about Mangla reservoir, Pakistan: ‘The first stage impounding of water in the reservoir formed by Mangla, Sukian and Jari Dams was expected to take place in March, 1967.’ Mangla Dam project was the largest embankment dam project in the world at that time. The 260 km2 reservoir was formed by three major dams. The original designs included provision for raising the dams by up to 12 m to offset sedimentation. In 2000, the Government of Pakistan decided to exploit the raising provisions and thereby store flood water that would otherwise be routinely released. Advances in geotechnical and seismic engineering, changes in design parameters and information from 40 years performance of the dams were taken into account in revisiting the designs for the raising. Construction for a 9 m raise in conservation level began in 2004 and was completed in December 2009 requiring about 31 × 106 m3 of fill materials. The total length of dam embankment is 14 km, maximum height 148 m. It is one of the largest dam raising projects ever undertaken.

Publisher

Thomas Telford Ltd.

Subject

Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering

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