Specifications include, but are not limited to: The City’s gravity sand filters consist of two adjacent bays of filters, a North bay and a South bay. This project involves rehabilitation of one side of the two-bay gravity sand filter system. The South filter bay shall be rehabilitated while keeping the North filter bay fully operational in automatic control. Filter bay size to be rehabilitated is 46 feet by 12.5 feet (46’ x 12’6” interior dimensions). Drawings of existing sand filters are included in these documents. This work involves complicated construction and close coordination between supplier and installer of sand filtration equipment. Because of the importance of the proper installation of the underdrain to the life of the filter and performance, the City will only consider bids from those companies with extensive prior experience in the supply and rehabilitation of sand filtration equipment of similar size and scope at municipal or industrial treatment facilities including similar type of underdrain systems. Each bidder must furnish at least three examples of relevant experience on the Section 00301 questionnaire. For each example project, the Bidder must provide a description of the project, its location, and a contact person willing and able to discuss the Bidder’s performance of that project. Experience must be documented for both the supplier and the installer. Filter Manufacturer to furnish all labor, materials, equipment and incidentals required for the rehabilitation of one automatic backwash filter mechanism as described below. The filter mechanism rehabilitation shall include these major components; the porous plates, filter media, and skimmer system including leveling probes, wash-water pump (3 HP Flygt NF-3085) and skimmer pump (1/2 HP Goulds Model 3886 consistent with materials used on the North filter project, controls and hardware. Bid shall include all materials and labor to perform a complete rehabilitation as described in these specifications.