This is a 100% Small Business set-aside Multiple Award Construction Contract (MACC) IDIQ with a 10-year ordering period (5-year base plus a 5-year option), requiring contractors to provide all labor, equipment, materials, tools, parts, and transportation to and from the job site. The contract ceiling is $500,000,000, with NAICS code 236220 and a business size standard of $45,000,000. The solicitation is anticipated to be issued approximately 15 days after this notice and will only be available on SAM.GOV, where all amendments will also be posted. Prospective contractors must be registered and active in SAM at the time of proposal receipt to be eligible for award. All responsible sources may submit a proposal for consideration.