Design Features

AMENDMENT 003

Bly Ranger District | July 2026

Corral G-Z IRSC Design Features
One objective of the Corral G-Z Contract is for the contractor to carry out sale preparation for future timber sales. This document provides context and outlines objectives to guide the work and ensure the project meets its intended goals. Mandatory Item 4: Project Area Implementation Plan (Grizzly) The focus of Item 4 is to refine and finalize the unit pools for commercial timber harvest as well as service units. The contractor will develop an implementation plan for the Grizzly sale. Identification of Timber Treatments
Timber treatment units will be categorized as one of the following: a) ponderosa pine
b) dry mixed conifer
c) moist mixed conifer, or
d) transmission-line treatment with timber removal.
Timber units will be treated according to the prescriptions in Attachment 4. Service work shall only be included where necessary to achieve the desired results, avoiding unnecessary treatments in areas that don’t require them. Service work units shall be classified as one of the following: i)
Transmission Line Treatments (Large-tree thinning without timber removal) ii)
Transmission Line Treatment (Small-tree thinning)
iii)
Cut, Skid, and Deck – Control Features
iv)
Cut, Skid, and Deck – Timber Units
v)
Cut, Skid, and Deck – Natural Stands
vi)
Small and Large Tree Thinning – Whitebark Pine Restoration vii)
Small Tree Thinning - Old Growth
viii)
Conifer Removal – Aspen
Service work units will be ground-verified by the contractor, and a determination will be made as to whether part or all of the unit in question requires service work according to the prescriptions listed in Attachment 4. Potential service units may be expanded beyond the extent of the polygons provided by the Forest Service if deemed necessary during ground verification. If, during the reconnaissance of potential timber units, the contractor finds areas without commercial value which could nonetheless benefit from one of the treatments listed above, these shall be added as units to the service plan.
Unit Delineation
Units shall be delineated according to the following criteria: - Treatment type
- Applicable DxP Prescription. For ponderosa pine and mixed conifer units, this will be determined by the predominant plant association group (PAG) in which the timber unit is located. A shapefile containing PAG layers will be provided to Contractor after contract award.