The City of Corona is soliciting qualified General Engineering contractors to rehabilitate the backwash tank at the Lester Water Treatment Plant. The work includes demolition, structural repairs, replacement of roof rafters, center column, shell supports, and application of interior and exterior protective coatings. The contract will be awarded to the lowest responsible and responsive bidder and will be executed in two phases, with a move‑in period of 160 calendar days followed by a 70‑working‑day construction window during the winter shutdown. • Scope: tank demolition, structural steel work, pipe and fitting installation, concrete supports, and full tank recoating. • Required licenses: California Class A General Engineering Contractor; bid bond 10 % and performance/payment bonds 100 %. • Mandatory pre‑bid conference on‑site 12 May 2026; electronic bid submission due 28 May 2026. • Compliance with prevailing‑wage, DIR registration, CARB off‑road diesel fleet certification, and subcontractor disclosure thresholds.