Description
The City of Columbus is seeking qualified contractors to execute the Phase 2 portion of the Hoover Dam Improvements, encompassing extensive civil, structural, mechanical, electrical, and environmental work at the Hoover Dam water‑supply facility. The scope includes demolition, site clearing, excavation, concrete patching and crack repair, pavement rehabilitation, bridge steel cleaning and painting, installation of temporary bulkheads, replacement/remanufacture of 16 electro‑hydraulic crest‑gate actuators (plus spares), utility upgrades (transformer, cable, duct‑bank), water‑line well abandonment, security enhancements, and procurement of an all‑terrain slope mower. The contract is structured as a lump‑sum with unit‑price items and a 20 % construction contingency, and it requires compliance with Ohio prevailing‑wage rates, extensive documentation, and a detailed construction schedule.
• Major work categories: civil earthwork, concrete repairs, bridge and structure rehabilitation, mechanical actuator replacement, electrical and control‑system upgrades, water‑utility infrastructure (wells, pipelines).
• Key performance milestones: actuator removal within 300 calendar days of Notice‑to‑Proceed; substantial completion ≈ 1,125 days after NTP; final completion ≈ 1,220 days after NTP.
• Contract requirements: 10 % bid bond, 100 % performance bond, detailed safety plan, environmental compliance (SWPPP), hourly prevailing‑wage payment, and submission of extensive as‑built, O&M, and warranty documentation.