This document is an addendum to a Request for Proposals (RFP) for the construction of the Beamline Complex at the Fermi National Accelerator Laboratory's (Fermilab) Long Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) project. The RFP seeks one subcontractor to perform construction services for the Beamline Complex, which includes buildings, enclosures, and site infrastructure to support the LBNF Beamline. The work is to be performed under a Firm Fixed Price (FFP) subcontract. Offerors are required to attend a mandatory pre-proposal conference on July 11, 2024, and submit questions by August 15, 2024. The proposals shall be valid up to the anticipated award date, which is 8 months from the proposal due date. Fermilab reserves the right to reject any and all proposals and will not reimburse firms for any preparation costs.
