Collin County, TX invites sealed bids for Courthouse Chilled Water Lines Replacement. The project scope includes replacing the existing 18-inch black steel underground chilled water piping with 18-inch underground HDPE chilled water piping in same location. Base bid includes the piping beginning at the new vault and extending to the underside of the building entrance. Black steel will used at the building entrance where the 18-inch chilled water supply and return risers will have 18-inch butterfly valves added for the building isolation. The new vault will house two 18-inch isolation valves to serve the future scope. Alternate 1 will include additional piping from the new vault to existing vault #5 for the chilled water replacement scope of work. The courthouse building will require temporary cooling for the duration of the chilled water replacement project. Contractor to provide 500 ton air cooled chiller with generator for temporary service during construction. The building will require staging work for the connection to the temporary chiller. Work includes setting up chilled water piping connections for a temporary chiller. Installation of valves will require cryogenic freezing of existing chilled water lines for the installation of valves for both the risers and also the temporary piping connections to the temporary chiller expansion. Question & Substitution Request Deadline:September 13, 2024, 5:00pm BID SECURITY: All Bidders must submit, prior to the bid opening time, a Certified Check, Cashiers Check or acceptable Bid Bond payable without recourse to Collin County in the amount of not less than five percent (5%) of the total bid plus alternates as submitted. Contractor must furnish a performance bond, payment bond and one (1) year maintenance bond within ten (10) consecutive calendar days following award of contract. The bonds shall be issued by a corporate surety in accordance with all Texas Law, including but not limited to, Chapter 2253 of the Texas Government Code and Chapter 3503 of the Texas Insurance Code, for public works projects.