• New plant will expand wastewater service and provide irrigation north of Doha, supporting the city's rapid growth
DOHA, QATAR, May 11, 2007 -- CDM, in association with Kuwait-based KEO International Consultants, will provide program management services for the design, construction, and commissioning of a $1.35 billion wastewater collection, treatment, and reuse project for the Public Works Authority of the city of Doha, Qatar.
The project will upgrade and expand residential wastewater services for more than 900,000 people and provide capacity for further urbanization in an area that could include as many as 1.2 million people over the next several decades. This is the first program management contract awarded by the Public Works Authority and is expected to be a showpiece project using state-of-the-art treatment processes.
The project includes sewer systems for existing and planned urban areas around Gharaffa Bay, West Bay, and the village of Semaisma, north of Doha; a 244,000-cubic-meter-per-day advanced wastewater treatment plant; pump stations and forcemains; and a reclaimed water irrigation network for Doha city landscaping and farm agriculture. The wastewater treatment plant will be delivered using a design-build process.
The advanced treatment facility will produce effluent that will be reused for irrigation, which is critical in this water-scarce nation. Qatar receives an average rainfall of less than 3 inches per year.
Significant project challenges include building a raw sewage pump station 42 meters in diameter and 45 meters deep, excavated into limestone with high groundwater conditions; installing 30 kilometers of 2-meter-diameter raw wastewater forcemain pipes; and tunneling for about 20 kilometers of interceptor sewers up to 2.5 meters in diameter, to depths of 30 meters.
CDM is also providing technical specialists for treatment process, civil, mechanical, and construction engineering, as well as hydraulic review.
The project is estimated to require up to 5 years to complete. The program management efforts require simultaneously coordinating and completing the construction and commissioning of six major, interconnected construction projects, within a relatively tight time schedule.
Doha is the capital of Qatar, with a current population of about 340,000. Recent efforts to modernize the city and reduce the country's economic reliance on oil and gas have led to a construction and population boom. Between 2004 and 2006, the city's population increased by 60,000.
The team has begun work and its first members have mobilized to Qatar.
CDM is a consulting, engineering, construction, and operations firm delivering exceptional service to public and private clients worldwide.
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