Sealed bids for the Kehrs Mill Road Retaining Wall Replacement project, will be received electronically thru the County’s Vendor Self Service portal at https://stlouiscountymovendors.munisselfservice.com/Vendors/default.aspx until 2:00 PM on September 6, 2023, and at that time will be opened. Vendors may view the bid opening at https://bit.ly/3msZQph St. Louis County Project No. AR-1836, consists of removal of an existing timber tie retaining wall and installation of a modular block gravity retaining wall, removal and replacement of sidewalk and other incidental items within St. Louis County. Pursuant to Sections 107.400 and 107.401 SLCRO, all County solicitations, once published, are under a "Cone of Silence." All communication from a Vendor or a Vendor’s Representative relating to this solicitation must follow the processes defined herein. Any communication with other County staff regarding this solicitation is prohibited except the specific types of communication defined in Section 107.401 SLCRO. The Cone of Silence shall terminate at the time a contract resulting from the solicitation is executed or when all bids or proposals in response to the solicitation are rejected by the County. Violation of Section 107.401 SLCRO by a Vendor or Vendor’s Representative shall result in designation by the Director of Procurement of the bid, proposal, or statement of qualifications as non-responsive. Communications regarding this solicitation are authorized only with the following County Staff. In addition, County clerical staff are permitted to route communications, including phone calls and written communications. Communications prior to the bid opening shall be by email only. Communications after the bid opening with authorized staff related to contract negotiations, investigations into contractor capability or the preparation for construction activities may be verbal or written. The Acting Deputy Director listed below may authorize additional points of contact as deemed prudent; all such authorizations shall be in writing.: Contract Administrator & Media Manager: Shandrika Combs at SCombs@stlouiscountymo.gov All questions must be submitted by 5:00 PM on August 30, 2023 via e-mail to the Contract Administrator & Media Manager as noted above. All questions must be submitted by 5:00 PM on August 30, 2023 via e-mail to the Contract Administrator & Media Manager as noted above.