Mariposa County, CA Home of Yosemite
Mariposa Biomass Project
Project Description & Overview

The Mariposa County Planning Department has received an application for a Conditional Use Permit from the Mariposa Biomass Project.  Application No. CUP 2017-117

  • The proposed project is for a 2.4 MW Bioenergy Facility and a woodchip storage yard, which would be located in the Mariposa Industrial Park.
  • The project parcels are 2.86 and 2.41 acres and located at 5673/5686 Copper Leaf Dr., Mariposa.  APN’s 012-050-066 and 012-050-067
  • Parcels are in the Mountain General zone and in the Natural Resources land use designation within the Expanded Mariposa Town Planning Study Area. 
  • The site is also subject to PDZ 87-1 (Ordinance 696), which will regulate the development of this project.

The project requires a conditional use permit, environmental review and public hearings. 

Appeal 2018-051
Appeal of Planning Commission Approval of the Mariposa Biomass Project -
Conditional Use Permit (CUP) No. 2017-117. Ruth Sellers, Et Al. Appellant.

The Board of Supervisors adopted Resolution No. 2018-357 Denying the appeal at their meeting of  July 17, 2018. The Resolution and Agenda item may be found at:

Resolution 2018-357

The July 17, 2018 Board of Supervisors Agenda Item L.  Appeal No. 2018 051

Planning Commission Project Approval Documents

The project was approved at the February 23, 2018 Planning Commission Meeting.
The links below are for the Planning Commission Agenda Item and the Final Approval Resolution:

Project Agenda Item, Staff Report and Attachments

Planning Commission Resolution

Planning Commission Public Hearing for the Biomass Project

Date: February 23, 2018
Time: 9:00 AM (or as soon thereafter as possible)
Place: 5100 Bullion Street, Mariposa CA. Board of Supervisors Chambers

Click here for:


Notice of Public Hearing and Intent to Adopt a Subsequent Mitigated Negative Declaration

State Clearinghouse Number 2018011038

Agency Commenting & Preliminary Review

The Agency commenting request is underway. This step solicits comments from agencies and departments with regulatory purview over aspects of the proposed project. This step is not designed for public comments. 

As the project moves forward there will be many steps including multiple opportunities for public comment on the project.

Until that occurs, additional project details are included in the Agency Request for Comments  that may be found at:

Mariposa Biomass  Preliminary Agency Comment & Project Submittals

This web page will be updated as the project progresses so please check back for additional information. 

If you have any questions please feel free and contact the project planner:

Steve Engfer 

Thank you!


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PO Box 784 | 5100 Bullion St. | Mariposa, CA 95338

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