South Avenue Safety Project

South Avenue Safety Project 3

Project Description

This safety project in Tehama County will be taking place at the intersection of State Route 99 and County Road A9 (South Avenue). The project proposes to reduce the frequency and severity of accidents by replacing the existing stop sign controlled intersection with a roundabout intersection after a traffic collision analysis was conducted by the District 2 Traffic Safety Branch identified a pattern of collisions at this intersection. 

Work will include roadway excavation to accommodate the new alignment and structural section, installation of concrete curbs and gutters, installation of a center island, installation of new signs, and drainage improvements.

Work will begin April 28, 2025 and includes five phases of construction (for a detailed explanation of the construction schedule, please see the webinar below). The project is expected to end in November of 2025, and delays are expected to be a maximum of 14 minutes on paved surfaces, and up to 23 minutes on unpaved surfaces.

South Avenue Safety Project 6

Environmental Impacts

The addition of a roundabout in this area will have the following environmental impacts -- 

  • Wetlands: Approximately 0.32 acres will be permanently impacted and 0.12 acres will be temporarily impacted. Wetlands are assumed to be occupied by federally listed species (vernal pool tadpole shrimp, vernal pool fairy shrimp, and Conservancy fairy shrimp). 
  • Seasonal Stream: Approximately 0.013 acres will be permanently impacted and 0.006 acres will be temporarily impacted. 
  • Riparian: Approximately 0.004 acres will be permanently impacted.
  • Annual Grassland: Approximately 2.75 acres will be permanently impacted and 2 acres will be temporarily impacted.
  • Aesthetics: Visual impacts associated with a 45-foot-tall tower, flashing beacons, and safety lighting.
  • Williamson Act Lands: Conversion of approximately 2.75 acres.

To view the full Environmental Document, click here
To view the virtual public meeting help on March 10, 2022, click here

Contact

Project Manager: Sara Hunt

Public Information Officer: Kurt Villavicencio

South Avenue Safety Project Virtual Public Meeting - April 23, 2025

The webinar above explains the five phases of construction for the South Avenue Safety Project, and addresses some concerns brought up by those in attendance.