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CalTransCalTrans I-5 Native Tree Planting

Project Summary
Type Habitat restoration project
Project Lead Chris Robbins
Partner Caltrans

Project Overview

The Project is a cooperative agreement between CalTrans and the Yolo RCD. This project consists of planting native trees, shrubs, and grasses at six interchanges along Interstate 5 in Yolo County. The project includes the installation of drip irrigation system at each interchange. Trees, shrubs, and grasses will be planted, protected with tree protectors, mulch will be placed around plants, fertilized, and watered in. Plants will be irrigated as appropriate. Areas will be maintained for weed control using mechanical and chemical methods. Any dead plants will be replaced. The plantings will be maintained for a 3 year period.

Project Description

Start date January 2009
End date February 2013
Type of Activity
  • Preparation of planting areas
  • Installation of irrigation system
  • Planting of trees, shrubs, and grasses
  • Irrigation
  • Maintenance for weed control and fire risk reduction
  • Replace dead plants
Deliverables Project acceptance by Caltrans Feb., 1, 2013
Goals Establish native plantings along Interstate 5 in Yolo County


Site Name


  • West Street, OC 22-150, PM R9.4
  • Zamora Road, OC 22-157, PM R17.6
  • Route 505/5, SEP 22-143, PM R22.6
  • County Road 8, OC 22-30, PM R23.8
  • County Road 6, OC 22-138, PM R25.6
  • County Line Road, OC 22.139, COL PM R0.0
Size (acres) 48.4 acres

Additional Information

Biological and Economic Effects

Tree plantings will reduce the area in need of maintenance, reduce fire risk, and reduce invasive weed populations. The native grass plantings can improve soil properties and reduce erosion along roadsides. The native plantings will provide potential habitat for native pollinators and potential habitat for small mammal and bird species.

Public Use Sites are located in Interstate and road interchanges no physical public use is expected, but has an aesthetic value.


This project is funded by the California Department of Transportation (Caltrans) Federal/State Transportation Enhancement funds.