UNSPSC 81101520: Hydrology assessment service

Rainfall basis for stormwater calculations

UNSPSC 81101520 Hydrology assessment service, a Commodity code, names work that state and local governments procure unevenly and often misclassify in their solicitations. The recent opportunities block shows little activity directly tagged to hydrology assessment as a standalone service; the code appears in procurement notices alongside broader facility, infrastructure, and engineering assessments where hydrologic evaluation is one component of a larger scope rather than the primary deliverable. When hydrology assessment does appear as a discrete line item, it typically sits within stormwater infrastructure design, drainage system evaluation, pavement condition assessment (where hydrologic modeling informs roadway drainage), and environmental site characterization. State and local buyers spanning county transportation departments, city public works and stormwater offices, water authorities, and special-purpose districts occasionally solicit dedicated hydrologic studies—condition assessments of dam systems, levee stability reviews, riparian restoration planning, and water quality monitoring—but these opportunities are sparse and geographically dispersed rather than concentrated in a single jurisdiction or region.

Recent activity shows hydrologic assessment components embedded in larger engineering procurements rather than standalone hydrology-only services. The Clay County Board of County Commissioners (Florida) issued RFQ 2526115 in October 2026 for a Pavement Condition Survey and Pavement Management Program covering 831 centerline miles of roadways, with hydrologic analysis implicit in drainage and ride-quality evaluation. Park City Municipal Corporation (Utah) solicited water and stormwater infrastructure design engineering (RSOQ PCMC27039WAT, due October 30, 2026) encompassing hydrologic and hydraulic modeling as part of six capital improvement projects. Pinellas County, Florida issued RFQ 250731RFQCCNA for Crystal Beach drainage and roadway improvements (due August 5, 2025) and RFQ 250180 for Cross Bayou Estates drainage improvements (due July 24, 2025), both requiring hydrologic modeling as embedded design services. The Brazos River Authority (Texas) solicited design services for hydrostatic pressure relief system and downstream channel assessment at Sterling C. Robertson Dam (RFPNO261385, due October 14, 2026), which calls for comprehensive hydrologic investigation. The Urban Flood Safety & Water Quality District (Oregon) requested environmental HTRW testing services related to the Portland Metro Levee System (SQ1005400017095, due June 17, 2026), including hydrologic and soil-testing components. Geographic spread includes Florida (Pinellas, Clay County drainage work), Georgia, Texas, Utah, Oregon, and scattered Midwest and Northeast jurisdictions, with no dominant state or region. The code shows marginal pursuit potential in its current state; hydrology assessment typically bundles within larger design, engineering, or infrastructure management contracts rather than appearing as a standalone procurement line.