Addendum 4 is issued 8/1/2024 to incorporate updated information on funding and milestones. Please see the re-issued RFP Letter for anticipated amounts. Additionally this addendum removes the "draft" designation from the documents. The draft RFP contains Instructions to Offerors, Drawings, Specifications, and the Sample Subcontract including applicable documents. Funding Availability and Subcontract Milestones will be provided prior to the Pre-Proposal Meeting. DESCRIPTION FRA expects to select one subcontractor to perform construction services of the Near Detector Complex as required by the LBNF/DUNE-US Project, NSCF at Fermilab under a Firm Fixed Price (FFP) Subcontract. The work shall include all services, labor, material, tools, equipment, excavation, shoring, testing, inspection, and all necessary General Conditions Work that is required by or may be reasonably inferred from the Subcontract documents to provide general contractor construction work for the project. Refer to the Reference Drawings and Technical Specifications in Packages 2 and 3 for more information. The NSCF Near Detector Complex Construction scope includes a service building, primary and secondary shafts, detector cavern, and site improvements including access road improvements, an equipment yard, a hardstand, and utilities that will house and support the LBNF Near Detector. The proposals shall be valid up to the anticipated award date, which is 7 months from the proposal due date. FRA reserves the right to reject any and all proposals, to waive any minor irregularities in any proposal, or to cancel this RFP at any time prior to award without cost to FRA. FRA will not reimburse any firm for any preparation costs or any other costs related to the participation in or preparation of this RFP. MANDATORY PRE-PROPOSAL CONFERENCE Offerors are required to attend a Pre-Proposal Conference and to inspect the work site on Wednesday, July 10, 2024, starting at 10:00 AM Central Time. FRA will present information about the project, which should be of interest to all Offerors. The conference will be held in the CDF Building 327 conference room. Offerors that do not attend the Pre-Proposal Conference will not be eligible for award and any submissions provided will not be evaluated. Offerors shall inform the FRA Procurement Specialist (bquinn@fnal.gov) no later than 5:00 PM Central Time on Wednesday, June 26, 2024, of the number and name of persons who will attend the site inspection, including any lower tier subcontractors, and the company they will be representing. OFFERORS' QUESTIONS Any prospective Offeror desiring an explanation or interpretation of the solicitation, drawings, specifications, etc., must request in writing by close of business (5:00 PM), August 15, 2024. Questions submitted after this date may not be answered prior to the proposal's due date. Questions must be submitted by email to bquinn@fnal.gov. Answers to questions that are germane to the interpretation of FRA's requirements will be issued to all offerors via addendum, ensuring that the identity of offerors submitting the questions will remain anonymous. Addendum 1 is issued 6/21/2024 to incorprate document revisions, access information for Pre-Proposal Conference, and questions and responses. Addendum 2 is issued 7/09/2024 to incorporate questions and responses, information on funding and milestones, and supplemental documents pertaining to a Sample Small Business Subcontraction Plan Template and FRA Illinois Sales Tax Exemption Certificate. Addednum 3 is issued 7/26/2024 to incorporate questions and responses, sign-in sheets and presentation slides from the 7/10/2024 Pre-Proposal Conference, an updated ES&H document, and extends the due date for questions to 8/15/2024 and the due date for proposals to 9/16/2024.