$1.6 billion project will upgrade three treatment plants serving 2.3 million people
MWH Global recieves a contract by the Miami-Dade Water and Sewer Department (MDWASD) to provide engineering design services for the comprehensive rehabilitation of three large wastewater treatment plants (WWTPs) in Miami-Dade County, Flor., as part of the department’s $1.6 billion consent decree program.
The three plants include the Central District WWTP - MDWASD’s oldest and largest asset with a treatment capacity of 143 million gallons per day (mgd), the North District WWTP, and the South District Wastewater Treatment Water Reclamation Plant, both with capacities of 112.5 mgd. Combined, these three facilities play a major role in providing clean water to the residents of Miami-Dade County.
MDWASD provides water and wastewater services to the 2.3 million people of Miami-Dade County. The department treats 300 mgd and disposes of 315 million gallons of wastewater per day.
In 2013, the county negotiated a Consent Decree with the U.S. Environmental Protection Agency, the U.S. Department of Justice and the State of Florida Department of Environmental Protection to reduce sanitary sewer overflows, eliminate treated effluent limitation violations and ensure proper capacity, management, operation and maintenance (CMOM) practices. The Consent Decree consists of three major components: pump station improvements, CMOM, and improvements to the three regional wastewater treatment plants, totaling $1.6 billion over the next 15 years.
The MWH project scope will include preparation of preliminary designs, final designs and construction documents, as well as permitting bid services and design services during construction at all three WWTPs, ensuring the project meets deadlines, and is in full compliance with Consent Decree programs.
The rehabilitation of the three plants is complex due to many equipment systems and structures that are more than 30-years-old. Use of laser reality capture is expected to replicate “as-built” representations of existing systems. For design, major facilities will employ 3D Building Information Modeling (BIM) with model development to Level 350 as defined by the BIM Forum Level of Development specifications.
Entering this project, MWH brings a strong track record of participation in the Community Business Enterprise (CBE) program, which seeks to partner with community business leadership to ensure that projects have positive impacts on the local economy and provide locally supportive project solutions. MWH is committed to meeting the 30% CBE goal on this project and has formed a team comprised of the best-qualified and most-respected local firms in Florida (many of whom MWH has worked with for over a decade). MWH is also plans to employ the local workforce and packaging projects to encourage local construction opportunities.
Rehabilitation of the wastewater treatment plants is expected to be completed by Dec. 1, 2019.