NIGP 21018: Concrete Encased Ducts

NIGP 21018 Concrete Encased Ducts, an Item code, encompasses concrete sidewalk, curb, and pavement work that state and local governments solicit when renovating pedestrian infrastructure, roadway capacity, and airport or bridge appurtenances. Recent opportunities show concrete work embedded in larger capital projects—sidewalk removal and replacement, new curb and gutter installation with ADA-compliant ramps, concrete pavement overlays, and concrete hardstand and apron construction—rather than duct encasement in isolation. Issuing bodies span county highway and engineering divisions, municipal public works and community development authorities, and transit/airport operators. Broward County, Orange County, and Santa Clara County appear as repeat solicitors of infrastructure-grade concrete work over the past three months, alongside smaller municipalities including Madison, Wisconsin; Fairburn, Georgia; and Salem, Oregon. Concrete specifications typically call for minimum 4,000 PSI air-entrained mix with 4-inch thickness; projects require Davis-Bacon or prevailing-wage compliance, commercial general liability insurance at $1 million to $2 million per occurrence, performance and payment bonding, and FDOT pre-qualification or equivalent licensing.

Recent activity concentrates in Florida and California, with notable mid-sized projects in Wisconsin, Georgia, and Oregon. The City of Madison Community Development Authority issued an IFB for Gay Braxton Apartments concrete sidewalk removal and replacement (1,300 square feet, response due July 17, 2026), subject to Davis-Bacon wages and local vendor preference scoring. Orange County, Florida solicited emergency replacement of two bridges under project Y26-742 (estimated cost $6.2 million, sealed-bid closure July 7, 2026), encompassing full structural replacement with supporting concrete work. Broward County's Highway Construction and Engineering Division posted the Pine Island Road Capacity Expansion project (ITB TRN2131938C1, response due June 2, 2026) requiring 40 percent self-performance, FDOT pre-qualification, and 30 percent County Business Enterprise participation. Santa Clara County's Central Expressway Pavement Rehabilitation (ITB ITBRDAFY260694, response due May 21, 2026) included partial-depth recycling, hot-mix asphalt overlay, and PCC curb, gutter, and sidewalk replacement across 142 working days. The City of Salem, Oregon solicited Terminal Apron Hardstand & Security Fencing at Salem-Willamette Valley Airport (ITB SKS004300016562, response due May 12, 2026; engineers estimate $750,000–$950,000) under FAA Airport Improvement Program funding with Davis-Bacon and Buy American Act compliance required.