NIGP 91388: Maintenance and Repair, Tunnel

NIGP 91388 Maintenance and Repair, Tunnel is an Item code under which state and local governments solicit construction and repair work on underground sewer, tunnel, and drainage infrastructure systems. Recent solicitations show water and wastewater authorities, counties, and municipalities procuring concrete repair, pipe replacement, structural rehabilitation, trenchless technologies, and associated access improvements on existing underground linear infrastructure. The work spans routine maintenance contracts and major rehabilitation projects, with issuing bodies including county departments of transportation, water and sewer authorities, and municipal public works divisions. Scope extends from localized sewer segment repairs to multi-phase system-wide restoration requiring specialized underground access techniques, geotechnical assessment, and environmental compliance.

Activity under this code concentrates in Florida, California, Michigan, Georgia, and South Carolina, with multiple recent solicitations from Broward County, Santa Clara County, and municipal water authorities. Representative opportunities include Wayne County soliciting bids for sewer rehabilitation and access improvements on the Ashland Relief, Linwood, Second Avenue, and Shiawassee sewers with response due October 1, 2026 (ITB 260 posting date July 7, 2026), the Beaufort-Jasper Water and Sewer Authority issuing an Invitation for Bids for the Alljoy Low Pressure Sewer Phase 1 project with sealed bids due March 24, 2026 and a Good Faith Effort requirement for Small and Minority Women-Owned Business participation, and the City of Atlanta Department of Watershed Management conducting a multi-step sealed bid process for on-call commercial diving services to support inspection, maintenance, and repair of wastewater and water infrastructure with a prequalification submission deadline of May 1, 2026. Set-asides and participation goals vary—BJWSA requires good faith effort documentation for SMWBE participation; Broward County and Santa Clara County contracts impose County Business Enterprise or disadvantaged-enterprise participation thresholds on roadway and drainage projects. Bond, insurance, and prevailing-wage requirements are standard across jurisdictions.