Improvement Works at Alajo Drain

SPECIFIC PROCUREMENT NOTICE Invitation for Bids (IFB) Project: Greater Accra Resilient and Integrated Development Project Contract title: Improvement Works at Alajo Drain Country: Ghana Credit No.: IDA-64100 RFB No: GH-MWH-219660-CW-RFB Issued on: September 19, 2026 The Government of Ghana has received financing from the World Bank toward the cost of the Greater Accra Resilient and Integrated Development Project and intends to apply part of the proceeds toward payments under the contract for the Improvement Works at Alajo Drain . For this contract, the Borrower shall process the payments using the Direct Payment disbursement method, as defined in the World Bank’s Disbursement Guidelines for Investment Project Financing. The Ministry of Works, Housing and Water Resources invites sealed bids from eligible contractors for the improvement works at Alajo drain. The works involve two main interventions: The construction of a covered reinforced concrete culvert parallel to the Eastern Railway Line ( Railway drain ), aiming to improve flood management in the Alajo urban area. The new infrastructure consists of a 1,596-meter-long rectangular box culvert with internal dimensions of 5.00m by 2.00m, designed with a constant invert slope of 0.3% to ensure optimal hydraulic performance and prevent water stagnation. The proposed drain alignment passes through densely urbanized areas, cultivated plots, and near existing structures, requiring the relocation or demolition of some buildings, careful excavation work including vertical sheet piling and retaining walls where needed, as well as connections with secondary drainage. Special attention is given to the crossing under the Eastern Railway Line, where the culvert will be placed at a depth of 1.4 meters to prevent interference with the rail infrastructure. The culvert discharges into the Odaw River with an outfall designed at a 45-degree angle to the river flow. Secondary drainage connections are included, with inspection manholes