Subcontracting Procurement Launched for Machado Wastewater Treatment Plant Upgrade Project in the United States

en.Wedoany.com Reported - On November 12, the U.S. engineering contractor Mountain Cascade issued a notice soliciting subcontractors and suppliers to request quotes from Disadvantaged Business Enterprises (DBEs) for the Machado Wastewater Treatment Plant upgrade and expansion project of the San Miguel Community Services District (San Miguel CSD) in California. The project plans to convert the existing pond-based wastewater treatment system into a membrane bioreactor (MBR) treatment system, increasing the Phase I treatment capacity from 200,000 gallons per day to 325,000 gallons per day (approximately 1,230 cubic meters), with future expansion capacity reserved up to 500,000 gallons per day. The deadline for project quotes is 14:00 on December 4, 2026.

The works mainly include demolishing the existing influent pump station, metering facilities, electrical equipment and some pipelines; dredging and renovating the existing treatment ponds; and constructing a new influent lift pump station, equalization tank, effluent pump station, sludge receiving facility and 3 leach beds. Meanwhile, MBR membrane treatment, ultraviolet disinfection, sludge storage and dewatering equipment will be installed, along with supporting electrical control facilities, standby generators, on-site roads, drainage and recycled water pipelines. Some core equipment will be procured by the owner, while the construction contractor will be responsible for infrastructure supporting works and equipment installation.

After the process upgrade, wastewater will be purified through pretreatment, membrane bioreactor treatment and ultraviolet disinfection. The original 4 treatment ponds will be respectively dredged, decommissioned or renovated according to the construction plan, with some ponds converted into influent equalization tanks and effluent storage tanks. During construction, the switchover between the old and new treatment systems must also be coordinated to maintain the operation of the existing wastewater treatment facilities.

The project has obtained approximately US$44.962 million in construction funding from the U.S. Clean Water State Revolving Fund (CWSRF). This subcontracting procurement covers earthwork, demolition, concrete, piping, pump stations, electrical control, equipment installation and site supporting works. Subcontractors must hold a valid California contractor license, public works contractor registration and appropriate insurance.