Project Name: Thirty-Six Divide Thinning Environmental Assessment

NEPA Number: DOI-BLM-ORWA-N030-2026-0010-EA

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Project Information

NEPA Number

DOI-BLM-ORWA-N030-2026-0010-EA
Project Name

Thirty-Six Divide Thinning Environmental Assessment
Project Type

EA
NEPA Status

In Progress - Public Scoping Period
Lead Office

Siuslaw Field Office
Last Updated

09/23/2026 - 05:46 PM

Project Description

The Northwest Oregon District Bureau of Land Management, Siuslaw Field Office is beginning the planning process on the Thirty-Six Divide Thinning Project through the development of an Environmental Assessment (EA). 

This site specific analysis will implement the 2016 Northwestern and Coastal Record of Decision and Resource Management Plan, this project would develop complex late-successional forest through variable density management thinning and connected activities for restoration and stand enhancement. Specifically, this project would implement silvicultural techniques in plantations, overstocked stands and modified younger stands to accelerate the development of structural complexity and biological diversity. Stands proposed for potential thinning in this analysis area are in need of thinning prescriptions that would provide long term habitat development while not precluding or delaying the short term development of spotted owl nesting-roosting habitat by 20 years or more. The BLM would achieve these goals by utilizing integrated vegetation management to: 
•	Promote the development and retention of large, open grown trees and multi-cohort stands. 
•	Develop diverse understory plant communities. 
•	Increase or maintain vegetative species diversity. 
•	Promote or enhance the development of structural complexity and heterogeneity. 
•	Ensure that stands are able to provide trees that would function as stable wood in the stream.

Additional related management activities include road work, culvert replacement, snag creation, tree tipping, and post-treatment activity fuel reduction actions (under burning/roadside piling/in-unit piling, ect.).
The project area BLM is proposing for treatment in this planning process is located approximately 20-30 miles west of Eugene, Oregon and near the communities of Blachly, Triangle Lake, and Walton, Oregon. 

The project planning area includes approximately 5,800 acres of land within the Late Successional Reserve and Riparian Reserve Land Use Allocations that span 34 sections of BLM administered lands in Lane County, Oregon. All of the LSR within the planning area will be evaluated, however,  approximately only half of those acres would be expected to be appropriate candidate stands for thinning to develop late successional habitat.

Project Location

State/Territory	County
Oregon	Lane County
Oregon	Lane County

Application Information

Program

Forestry & Timber
Sub-Program

Thinning

Project Dates

Start Date

9/23/2026

Project Office Information

Lead Office

Siuslaw Field Office
Offices

Siuslaw FO

Contacts

Contact 1 Name

Victoria Coraci
Contact 1 Email

[email protected]
Contact 1 Phone

(541) 683-6776