The District of Columbia ("District") Department of General Services (the "Department" or "DGS") is issuing this Request for Proposals ("RFP") to solicit proposals ("Proposals(s)") from offerors ("Offeror(s)") interested in serving as the design-builder ("Design-Builder" or "Contractor") for the development, design and construction of a new, multi-level parking structure to be built on Parcel 6 of St.