From 0 to 100-MGD in 30 Months - How the San Diego County Water Authority is Implementing the Largest Ultrafiltration Membrane Water Treatment Plant at Twin Oaks Valley with the Design-Build-Operate Process

摘要

The San Diego County Water Authority (Water Authority) currently imports water from the Metropolitan Water District of Southern California to supply the needs of its 24 member agencies in San Diego County. The Water Authority has initiated the new Twin Oaks Valley Water Treatment Plant (TOVWTP) project as part of a $3.2 billion Capital Improvement Program to meet the immediate need for additional regional treatment capacity.rnThe facility is designed to produce a base flow of 100-MGD of high quality drinking water with submerged ultrafiltration (UF), ozone, biological carbon contactors and chloramination while addressing increasingly stringent drinking water regulations, greater consumer demand for aesthetically pleasing tap water and diminished source water quality.rnThis large-scale facility will establish industry benchmarks by incorporating technological innovation and automated process control to optimally leverage operations staffing and water quality monitoring, environmental value and sustainability (e.g., minimizing residuals & energy consumption), and addressing public concerns (taste and odor, preserve green space, reduce plant footprint & public impact). As such, TOVWTP will serve as a landmark facility that meets the Water Authority's drinking water needs while exerting minimal local impact.rnThis presentation will cover the unique design, construction and schedule issues associated with a large-capacity facility requiring uninterrupted production of 100-MGD of drinking water. A key project challenge is meeting a fast-track delivery schedule. CH2M HILL must design, permit, construct, and commission the facility in less than 30 months (by April 15,2008). Once commissioned, CH2M HILL will be responsible for operations for a period of 15 years.rnThis information will be of interest to municipalities, utilities, regulators, and consultants at all staff levels who are interested in how a large capacity, state-of-the art drinking water facility is implemented on a fast-track schedule using an alternative procurement method.