Clifden Sewerage Scheme Stage 1: Waste Water Treatment Plant DBO Contract

Galway County Council

Clifden Sewerage Scheme Upgrade Stage 1 - Clifden Waste Water Tretament Plant is a design, build, operate and maintain, (DBO), contract. This contract is for the design, construction, commissioning and operation of the Clifden Waste Water Treatment Plant. The operation period of the DBO contract is 20 years. The contract will include the transport of thickened or dewatered sludge from the WWTP to a sludge satellite centre. The existing Clifden WWTP provides primary treatment and discharges settled sewage into the estuary of the Owenglin River in the inner Clifden Bay. Clifden has a current population of approximately 2 200 and is serviced by a combined stormwater/sewage drainage network. As the existing sewerage infrastructure has insufficient capacity to cater for the current and projected populations and the current level of treatment is inadequate, Galway County Council have proposed a two stage upgrade to the Clifden Sewerage Scheme. This contract is for the Stage 1 WWTP, which will be designed for a population equivalent of 4 975 P.E. In order to comply with the current Urban Waste Water Treatment Regulations effluent quality parameters of 25 mg/l BOD5 and 35 mg/l SS or better are required. Based on the shellfish water quality requirements in Clifden Bay and hydrographic modelling, a Faecal Coliform (FC) limit of 1 000 No./100 ml is also likely to be required in the final effluent. A decision on whether to include a sludge dewatering plant in the scope of works will be made subject to a life cost analysis. This contract will include the construction of an inlet pump station, the waste water treatment plant and a new marine outfall into the estuary of the Owenglin RIver to replace the existing short outfall. Additional modules will be added to the treatment plant as part of the Stage 2 upgrade, which will increase the plant capacity to 9 470 P.E. Stage 2 works are expected to be implemented five years after the commencement of the Operate and Maintain element of the Contract, and will be separate to this Contract.

Deadline
The time limit for receipt of tenders was 2011-08-18. The procurement was published on 2011-07-15.

Suppliers
The following suppliers are mentioned in award decisions or other procurement documents:

• • Electrical and Pump Services Ltd.

Who?

• • Galway County Council

What?

• • Sewer construction work › Sewage work › Sewage treatment works