NIGP 75052: Flexible Base

NIGP 75052 Flexible Base, an Item code, covers the supply of road subbase and foundation materials — primarily granular flexible base (Grade 1 and Type A), but also including surface rock, crushed limestone, and related aggregates — that state and local transportation agencies, counties, and municipalities use for highway, street, and bridge construction and maintenance. Recent solicitations show state and local governments buying flexible base material either as a standalone commodity in volume supply contracts or as a component within larger pavement rehabilitation and road-maintenance projects. Issuing bodies include state transportation departments, county road maintenance operations, city transportation and public works departments, and special-purpose districts; Santa Clara County and the City of Austin appear as repeat buyers in the recent opportunity set. The work typically involves either the delivery and placement of bulk aggregates under fixed-unit-price supply agreements or the integration of flexible base into broader construction scopes that include pavement overlay, curb and gutter installation, and traffic signal work.

Activity is concentrated in Texas and California, where the recent opportunity pipeline shows the densest volume. The Texas Military Department issued a statewide IFB in June 2026 for Type A Grade 1-2 road base delivery to five military installations (Camp Swift, Camp Bowie, Fort Wolters, Camp Maxey, and Camp Mabry) on an as-needed, no-minimum basis with estimated 2,000-ton orders, and Denton County posted Invitation to Bid 26-2913 for Flexible Base (Grade 1, Type A) with a contract term running July 1, 2026 through June 30, 2027 and two optional renewal years, due June 4, 2026. In California, Santa Clara County's Sanitation District No. 2-3 posted ITB ITBRDAFY270088 for the Structural Defect Repair Project Phase 2 in the unincorporated eastern foothills, with sewer mainline pipe replacements using PVC and HDPE pipe and completion required in sixty-five working days, due September 17, 2026. The City of Austin issued IFB 5000 MAS1008 for flexible base, surface rock, and 3x5-inch rock materials across multiple city departments, due August 18, 2026, with local and small-business preferences offering five percent discount for offers up to $500,000 and requiring vendors to maintain source facilities within 100 miles of Austin with minimum two years' documented experience. The City of Huntsville, Texas posted Bid No. 26-27 for road materials including flexible base and cement-stabilized flexible base with an estimated annual expenditure of $100,000, contract term through September 30, 2027 with four optional one-year renewals, and questions due June 15, 2026.