Tree Mortality
John Osbourn, Director of OES
Technical Questions: Dr. Richard Harris
891 Mountain Ranch Road
San Andreas, CA 95249
Mon - Fri: 8am - 5pm
Get Directions
PHONE: (707) 685-5508
Email Dr. Harris

Closed Weekends & Holidays

Items of Interest

New Projects Defined 4 October 2021

New Projects Defined

View the new project areas here. 

If you have received a right of entry form, please return it ASAP so projects can be implemented.

Bark Beetles 5 February 2020

Bark Beetles

Beetle life cycle, are your trees susceptible, controlling beetles in firewood and managing beetles in trees.

Calaveras Task Force 5 February 2020

Calaveras Task Force

Calaveras Task Force Members and Meetings.

Completed Projects 1 December 2020

Completed Projects

List of completed projects and trees removed.

Dead Trees by Year 2010 - 2019 15 June 2020

Dead Trees by Year 2010 - 2019

Dead Trees Fuel Wildfire Severity in Sierra Nevada 14 January 2021

Dead Trees Fuel Wildfire Severity in Sierra Nevada

Study Highlights the Role of Forest Fuels Amid a Warming Climate.

Frequently Asked Questions 5 February 2020

Frequently Asked Questions

Tree Mortality and Bark Beetle FAQ's.


Press & Alerts

Emergency Alerts 5 February 2020

Emergency Alerts

Sign-up for the Calaveras County Emergency Alerts.

What's New 5 February 2020

What's New

Upcoming Projects, Contracting Opportunities and Press Releases.