Stone & Lime Imports, Inc.

Stone & Lime Imports, Inc., a women-owned small business based in Brookfield, Massachusetts, delivers historic preservation, masonry restoration, and heavy civil engineering construction to the National Park Service and Department of the Interior as a prime contractor exclusively, with $165 million in combined potential value across 22 awards spanning 2013 through May 2026. The vendor holds SBA certification as a Women-Owned Small Business and competes predominantly under total small business set-asides and woman-owned small business sole-source designations, though recent larger awards have shifted to full-and-open (no set-aside) procurement.

Stone & Lime Imports' capability portfolio centers on structural masonry restoration, seawall repair and reconstruction, lighthouse preservation, historic building system replacement, and site-level construction at federally designated cultural heritage sites. Representative work includes a $36.754 million firm fixed-price contract (awarded May 2026, ultimate completion December 2027) with the National Park Service for repair and raising of the seawall at Castillo de San Marcos National Monument in St. Augustine, Florida, involving demolition and reconstruction of approximately 1,355 linear feet of seawall with sheet pile walls and granite facade; a $30.511 million contract (awarded September 2023, ultimate completion November 2027) for structural reinforcement, window replacement, electrical and mechanical system upgrades, and masonry restoration at Cape Hatteras Lighthouse in Buxton, North Carolina; and a $21.52 million contract (awarded January 2022, ultimate completion February 2026) for steam heat and distribution system replacement, structural repairs, and asbestos abatement at the Easton Building at Boston National Historical Park. Work is classified under NAICS 237990 (Heavy and Civil Engineering Construction), 236220 (Commercial and Institutional Building Construction), and 238120 (Masonry Contractors).

Customer concentration is extreme. The Department of the Interior National Park Service National Office anchors 90% of the combined potential value (10 awards, $148.9 million) and 45% of award count, with the remaining $16.1 million spread across the National Park Service Southeast Region (9 awards), the General Services Administration Public Buildings Service Region 1 (1 award, $9.4 million), the National Park Service Intermountain Region (1 award), and the Army Corps of Engineers New England District (1 award). The top-customer split by award count and potential value diverges sharply: NPS National Office dominates dollars but represents less than half of active award relationships; the Southeast Region drives volume with nine awards but carries modest dollar weight ($5 million combined).

Recent activity has slowed on an award basis — one award in 2025 and one in 2026 to date — but the vendor faces substantial recompete exposure. Four awards (combined potential value $97.3 million) reach ultimate completion within the next twenty-four months: the Castillo de San Marcos seawall contract (December 2027), the Cape Hatteras Lighthouse project (November 2027), the Boston National Historical Park steam system work (February 2026), and others. SCI-reported invoicing on federal service contracts above the $150,000 threshold reached $18.5 million in FY2024 across 13.8 FTEs delivered to the federal government, up from $5.2 million in FY2022 across 9.5 FTEs, reflecting growth in project execution volume. On federal services contracts captured in SCI, government-paid hourly rates run a median of around $390/hr, with senior labor pricing through roughly $698/hr.

Stone & Lime Imports operates as a prime contractor on 100% of its awards and averages 12% subcontractor engagement across SCI-reportable prime contracts, with 14 named subcontractors across the portfolio. The vendor builds its own delivery capability internally while selectively subcontracting specialized trades — for example, subcontracting 37% of contractor hours on the Fort Jefferson dredging contract (FY2024) and 84% on the Cape Hatteras project, indicating variable sub reliance depending on project scope and skill requirements. The vendor does not serve as a subcontractor to other federal primes in the award footprint.

Historic Masonry Restoration