ATT 2 Detailed Unit Sheet.pdf
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- Solicitation number
- 12363N25Q4095
- Issued by
-
Department of Agriculture Forest Service
About this file
This document is a Detailed Unit Information Sheet for the Crolo Mechanical Fuels Reduction project on the Okanogan-Wenatchee National Forest. The sheet provides specifications for 9 base mechanical treatment units and 1 optional unit, each ranging from 5 to 27 acres. Each unit requires consistent mastication treatment with specific requirements, including: masticating trees ≤7" DBH for Lodgepole Pine, Grand Fir, and Subalpine Fir; retaining disease-free Western White Pine and THPL; maintaining a 30-foot conifer spacing with ±50% flexibility; and prioritizing retention of Western Larch, Ponderosa, Douglas Fir, and Western Hemlock species.
The mastication specifications are uniform across all units, mandating that the average residual fuel bed depth should not exceed 3 inches, with less than 10% of residual fuels in 3.1" and larger size classes. Additional requirements include removing trees under 7" DBH within road prisms, shredding and scattering slash material for natural soil incorporation, and masticating all activity-generated slash to contract specifications. The treatment aims to reduce forest fuels, manage vegetation density, and promote forest health by selectively removing smaller trees while preserving preferred tree species.
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Text version
Base Items NO - Unit ID Sub Item NO.
1 - Crolo Mech. 1 1.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
17 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
2- Crolo Mech. 2 2.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
18 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
3 - Crolo Mech. 3 3.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
16 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
4 - Crolo Mech. 4 4.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
21 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
5 - Crolo Mech. 5 5.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
25 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
6 - Crolo Mech. 6 6.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
5 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
Crolo Mechanical Fuels Reduction - Detailed Unit Information Sheet
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
7 - Crolo Mech. 7 7.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
7 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
8 - Crolo Mech. 8 8.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
13 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
9 - Crolo Mech. 9 9.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
12 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
Option Items - Unit ID Sub Item NO.
Option Item. 10 - Crolo Mech. 10 10.1 Acres
Preferred
Conifer Leave
Tree
Conifer Spacing
(feet)
Max Conifer DBH
Cut Limit (inches) Treatment Mastication Requirements
27 Refer to #4 30' 7" Mastication 1. Masticate all ≤7" DBH Lodgepole Pine, Grand Fir, and Subalpine Fir.
2. Retain all disease-free Western White Pine and THPL regardless of size.
3. Spacing may vary ±50% in order to retain preferred retention species.
4. Preferred retention species are Western Larch, Ponderosa, Douglas Fir, and Western Hemlock.
5. The average residual fuel bed depth across the treated area should be no more than 3” and <10% residual fuels should be 3.1” and greater size classes
6. All trees < 7” DBH, regardless of species and spacing, will be removed within existing road prisms.
7. The slash material shall be shredded and scattered for natural incorporation into the soil.
8. Masticate all activity-generated slash, including piles, to contract specifications.
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