Project Details

Location
Willows Safety Roadside Rest Area (SRRA), Glenn County, CA
Contract Cost
$4,696,085.12
Date of Commencement
September 2020
Date of Completion
November 2023
Project Owner
Department of Transportation (DOT) - Caltrans
Contract Number
03-4F4204

Project Description

TSI Engineering Inc. performed comprehensive infrastructure and utility modernization at the Willows Safety Roadside Rest Area (SRRA) in Glenn County. The project focused on the complete overhaul of the facility’s critical water distribution and wastewater management systems to ensure long-term environmental compliance and operational reliability. 

Work was performed at a high-volume transit hub along Interstate 5, requiring coordination with Caltrans District 03 to maintain facility accessibility and public safety throughout the construction phases.

Scope Highlights

  • Installed lift station basins and removed sludge from treatment ponds.
  • Lined treatment and storage ponds with high-performance geomembranes.
  • Upgraded water distribution and advanced disinfection systems.
  • Deployed SCADA for real-time system monitoring.
  • Constructed structural steel facility and utility components.
  • Completed grading, foundations, and utility corridor earthwork.
  • Installed ADA-compliant signage and pavement markings.
  • Performed horizontal directional drilling for utility installation without surface disruption.

Performance

  • Executed utility cutovers in an active State rest area with minimal disruption.
  • Trained Caltrans personnel on SCADA and disinfection systems.
  • Achieved full compliance with 2018 Caltrans Specifications and state environmental standards.