NIGP 75004: Ash, Fly and Bottom

NIGP 75004 Ash, Fly And Bottom is an Item code that encompasses recovered and recycled mineral byproducts from industrial processes, particularly materials derived from power generation and waste treatment operations. State and local governments procure these materials primarily for infrastructure applications—pavement stabilization, embankment fill, and sewer rehabilitation projects—where fly ash and bottom ash serve as cost-effective and environmentally sustainable substitutes for virgin materials. The code draws solicitations from county sanitation districts, county transportation departments, and related special-purpose infrastructure authorities managing capital maintenance and rehabilitation programs.

Santa Clara County has been the primary recent buyer under this code, issuing two infrastructure rehabilitation ITBs in the first half of 2026. County Sanitation District No. 2-3 solicited bids for the Structural Defect Repair Project Phase 2 (ITB ITBRDAFY270088, due September 17, 2026), a sanitary sewer mainline rehabilitation program in the unincorporated eastern foothills encompassing pipe replacement, pipe bursting, and mainline extensions using PVC and HDPE materials. Separately, Santa Clara County Department of Transportation issued an ITB for the Central Expressway Pavement Rehabilitation Project between Bowers Avenue and Scott Boulevard (ITB ITBRDAFY260694, due May 21, 2026), specifying partial depth recycling, hot mix asphalt overlay, pavement repairs, and related improvements. Both opportunities required physical bid submission to the County Government Center in San Jose with fixed response deadlines and specified working-day completion timelines. Recent activity is concentrated in California, specifically in Santa Clara County's infrastructure portfolio.