Postponed from 07/04/20 to 28/04/20 the deadline of the invitation to tender for the design and build contract for Wakrah and Wukair drainage tunnel. The contract for Drainage Tunnel (DT) is approximately 13 km in length and is in the vicinity of the New Orbital Highway and Truck Route and terminates at the Al Wakrah & Al Wukair Sewage Treatment Plant (STP), which will be under construction simultaneously. The duration of the contract is 1260 calendar days from the Commencement Date, together with 400 calendar days of Maintenance Period from the date of issuance of the Completion Certificate. Contact Public Works Authority Ashghal, Doha, Qatar, fax (+974) 44950777, email esd.tenders@ashghal.gov.qa. For tender information please click here. Ref.n. PWA/GTC/085/2019. 17/20.