This document is an Addendum to a Request for Proposals (RFP) for the Fermilab LBNF NSCF Construction - Beamline Complex project. The RFP seeks one subcontractor to perform construction services for the Beamline Complex, including buildings, enclosures, and site infrastructure to support the LBNF Beamline. The work is to be performed under a Firm Fixed Price (FFP) Subcontract. Key details include: a mandatory pre-proposal conference on July 11, 2024, with a deadline of June 26, 2024 to notify the agency of attendees; a deadline of August 15, 2024 for offerors to submit questions, with answers provided to all via addendum; and the anticipated award date being 8 months from the proposal due date. The Department of Energy's Fermi National Accelerator Laboratory is the federal agency issuing this RFP.
