# California eProcure #59A1414

Caltrans on-call geotechnical drilling, instrumentation, and traffic-control services

**Posted:** October 16, 2026
**Respond By:** November 05, 2026
**Identifier:** 59A1414
**NAICS:** 237990, 213115

Caltrans is seeking on-call geotechnical drilling and related field services across seven Southern California counties.
- **Government buyer:** California Department of Transportation (Caltrans), Administration, Division of Procurement and Contracts.
- **Scope and locations:** Geotechnical exploration drilling, core drilling, cone penetration testing (CPT), sampling, instrumentation installation and destruction, borehole and piezometer destruction, percolation-test excavation, permits, mobilization, traffic control, and related support in Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego, and Ventura counties.
- **OEMs and vendors:** No product manufacturers or contractor vendors are named. Caltrans is the issuing agency.
- **Estimated bid-schedule quantities:** The schedule includes day, night, weekend, and holiday service rates, plus closures, transportation, and reimbursable costs. Quantities are listed in the service line items; the bid schedule does not specify units for these estimates.
- **Notable requirements:** The contractor must hold a California Class A General Engineering Contractor license, C-57 Well Drilling Contractor and C-31 Construction Zone Traffic Control Contractor licenses, and a California Motor Carrier Permit. Specified commercial rotorcraft, pilot, and FAA medical credentials are required for helicopter-related work. Bidders must provide resumes for three drillers and three drillers’ helpers; drillers need at least three years of relevant drilling and sampling experience. Traffic-control staff must meet required supervisor and technician training qualifications. Prevailing wages apply when the total bid exceeds $15,000.
- **Performance term:** Approximately three years, with on-call work assigned through individual service requests. The start is contingent on the required state approval; each service request sets its own work period.

### Description

Caltrans is seeking on-call geotechnical exploration drilling and destruction of boreholes and piezometers, including traffic control. The contractor must provide the labor, materials, equipment, permits, travel, and incidentals needed to perform the work at various locations in Southern California. The listed counties are Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego, and Ventura. The solicitation states that prevailing wages apply if the total bid exceeds $15,000; no estimated contract value is provided.

[View original listing](https://caleprocure.ca.gov/event/2660/59A1414)