Asia Baru Construction Sdn. Bhd. submitted a proposal entitled “Feasibility Study For Potential Raw Water Resources in Sungai Selangor River Basin & The Proposal For Raising Sungai Tinggi Dam” to Perbandanan Urus Air Selangor Berhad (PUAS) in April 2002 and recommended to PUAS to adopt the option of raising the Sg. Tinggi Dam.
In June / July 2002, PUAS commissioned the designer of the dam, SMHB Sdn. Bhd. to investigate the feasibility for the raising of Sg. Tinggi Dam and concluded that it was technically feasible and safe to raise the dam embankment and reservoir water to create a larger storage.
The Letter of Acceptance for the project was issued by PUAS to the Turnkey Contractor (Asia Baru Construction Sdn. Bhd.) in August 2002 and the Contract Document was duly signed and stamped in October 2002. Construction works started in earnest in September 2002.
Briefly, the scope of work for this project comprised the following major components: