ITB#P11767-C - Construction Services, Plante's Ferry Stormwater Project

NATURE OF THE PROJECT: Spokane County is seeking a qualified Contractor to provide all materials, labor, and equipment necessary for the Plante’s Ferry Maintenance Facility Stormwater Improvements. The existing facility is fully developed with multiple buildings, paved and unpaved surfaces, minimal stormwater facilities and existing utilities. The site needs to be brought up to compliance with the National Pollutant Discharge Elimination System (NPDES) Phase II Municipal Stormwater Permit requirements. Scope of work generally includes but is not limited to: Demolition work: Concrete paving Underground storm utilities Decommissioning of an existing cesspool Decommissioning/removal of existing septic drainage field Interior plumbing (waste only) Proposed Improvements: Interior plumbing (waste only) system to connect existing restrooms, sinks, eyewash stations and floor drains Exterior gravity sewer system that will connect to a future sewer lift station (separate funding under separate

contract) Outdoor fuel containment / spill control structure Outdoor vehicle wash pad Oil/water separator Stormwater collection and underground conveyance system Bio-Retention pond Concrete and asphalt paving The maintenance facility will need to remain open during construction (Summer ’24 – Fall ’24) and coordination must be made with Spokane County staff to accommodate facility closures during specific times. Due to the project’s proximity to the Spokane River, environmental planning and permitting has been completed including a shoreline exemption and SEPA. See the specifications for more information on shoreline permits obtained as well as the Inadvertent Discovery Plan & Shoreline Impact Assessment. A grading permit application was submitted to Spokane County on October 20, 2023. Spokane County Parks will pay for said permits and provide them to the contractor when ready. It will be the contractor’s responsibility to comply with all permitting requirements. Spokane County Parks has completed an application for coverage under Ecology’s Construction Stormwater General Permit and the permit will be transferred to the contractor.