UT1097 Western Trunk Sewer Interim Diversion

The City of Ontario is seeking a qualified contractor to install new vitrified‑clay‑pipe sewer mains, modify existing manholes, install a slide‑gate structure, and add ultrasonic flow‑meters as part of an interim diversion of the western trunk sewer. The work includes extensive utility coordination, traffic‑control planning, shoring, back‑fill, pavement restoration, and required testing and documentation. The contract is awarded to the lowest responsive bidder and must be completed within a 150‑day timeframe. • Install ~2,350 ft of 12‑in. and 21‑in. VCP sewer pipe along Vineyard Ave., Riverside Dr., and Chino Ave. corridor. • Construct and modify manholes, a slide‑gate structure, and install flow‑meter monitoring equipment. • Provide traffic‑control, temporary bypass pumping, SWPPP compliance, and complete all required testing (air‑tests, CCTV, flow‑meter calibration). • Deliver as‑built drawings, obtain all permits, and adhere to strict work‑hour and liquidated‑damage provisions.