Raising Of Wala Dam

Raising Of Wala Dam

The existing Wala Dam is a composite dam comprised of a central spillway section made of Roller Compacted Concrete (RCC) and two wing embankments . The dam was constructed with a spillway crest elevation of 520 MASL (central part) and with wing embankments on both banks with a crest elevation of 524.0 MASL. The work carried out includes raising the dam's level by 15 meters, which involves raising the main spillway and the walls using roller-compacted concrete and reinforced concrete. The sides were raised with reinforced concrete walls, and the rock fill level was raised by 8 meters. The work also included curtain grouting, as well as mechanical and electrical works. The heightening of the current dam has increased its storage capacity from 9 million cubic meters to 25 million cubic meters.

Major aspects of the project:

• The length of the dam at the crest is 378 m.
• The main spillway width is 105 m
• The height of the dam after raising 62 m.
• The volume of CVC is 75,000 m³.
• The volume of RCC is 75,000 m³.
• The volume of excavation is 100,000 m³
• The volume of fill materials (Embankment) is 90,000 m³.
• The drilling & grouting length is 33,000 m.
• Jet grouting volume is 4,000 m³.
• Existing 400 m tunnel length to be extended 200 m.

Project Information:

• Employer:  Jordan Valley Authority.
• Consultant:  National Engineering Services Pakistan (NESPAK) with Consolidated Consultants Group (CCG).
• Contract Value:  35 Million USD
• Actual value of the project 46 Million USD
• Project status: Completed