# California eProcure #59A1428

Caltrans On-Call Water and Wastewater Engineering and Design Support

**Posted:** September 29, 2026
**Respond By:** October 29, 2026
**Identifier:** 59A1428
**NAICS:** 541330

Caltrans is seeking on-call engineering support for water and wastewater projects across California.
- **Buyer:** California Department of Transportation (Caltrans), State of California; no specific sub-agency or office is identified.
- **Opportunity:** On-call water and wastewater project development and construction design support, provided as needed to support improvements to the state transportation system.
- **Services requested:** Consultation, research, professional and technical engineering studies, field sampling, report preparation, and construction design support.
- **Geographic scope:** Work may occur in any Caltrans district and county in California.
- **Estimated contract value:** $3.6 million–$5.85 million.
- **Period of performance:** Estimated five years; services are on an as-needed basis.
- **OEMs and vendors:** No OEMs, vendors, or specific products are identified.
- **Notable requirements:** Support may include field sampling and engineering studies as well as reports and construction design.

### Description

Caltrans is soliciting Statements of Qualifications from qualified firms for a potential five-year contract, estimated at $3,600,000–$5,850,000. The work involves consultation, research, and professional and technical engineering studies supporting water and wastewater systems-related project development, including field sampling, reports, and construction design support on an as-needed basis for Caltrans District 59. Projects are intended to improve the State transportation system and may be located in any Caltrans district and any county in California.

[View original listing](https://caleprocure.ca.gov/event/2660/59A1428)