NIGP 91157: C.i.p., Soil Investigation

NIGP 91157 C.i.p., Soil Investigation is an Item code under which state and local governments procure geotechnical investigation, soil boring, laboratory testing, and engineering analysis services to support facility design, construction, and seismic compliance projects. The scope of work includes subsurface investigation through borings, cone penetrometer soundings, and geophysical surveys; in-situ and laboratory soil classification and strength testing; chemical analysis for corrosion evaluation; and interpretive reports with foundation design recommendations and compliance analysis against applicable building codes and standards. Issuing bodies span counties (Santa Clara County, DeKalb County in Georgia) and municipal utilities (Dalton Utilities in Georgia), reflecting demand across capital planning, infrastructure modernization, and specialized facility projects. Representative recent work includes Dalton Utilities' geotechnical survey for a new gas generation facility in Whitfield County requiring 24 borings up to 100 feet deep, laboratory testing including triaxial and consolidation analysis, and an interpretive report addressing foundation design, settlement, seismic hazard analysis, and compliance with the 2024 International Building Code and ASCE 7-22 standards, with proposals due June 30, 2026.

Georgia and California show recent activity under this code. Issuing bodies have posted opportunities as RFP and IFB notices. Santa Clara County solicited progressive design-build qualifications and proposals for seismic compliance improvements at a county facility (RMC) under RFP-FAFFY27_CP26011, with prequalification submission deadline September 16, 2026 and full proposals due October 23, 2026; the County requires proposal security at ten percent of estimated cost and will issue the complete solicitation only to prequalified design-build entities. The Dalton Utilities geotechnical survey scope encompasses comprehensive field investigation, laboratory testing, and interpretive reporting for foundation design across multiple structures at the RICE Generation Facility, addressing foundation loads ranging from 0.5 to 2.0 ksf on shallow foundations and drilled shaft support for heavier loads, with seismic design category analysis and settlement predictions.