Attachment A FY25 Sierra Pelona Landscape Integrated Fuels_Tree Selection_sb_8525.docx
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- Attached to
- Sierra Fuels Landscape
- Solicitation number
- 127EAV26R0004
- Issued by
-
Department of Agriculture Forest Service
About this file
This document is an Attachment A specification for live tree selection in a fuels reduction landscape project for the U.S. Forest Service. The attachment provides detailed guidelines for contractors on selecting trees to be cut or preserved during a forest management operation, focusing on the Sierra Pelona landscape.
The specification outlines a prioritized approach for tree selection, first targeting the most desirable trees with characteristics such as dominant or co-dominant height, healthy foliage, straight boles, and freedom from physical/disease/insect damage. Preferred tree species include California black oak, blue oak, ponderosa pine, and several other native oak and pine varieties. When optimal trees are unavailable, contractors must select less desirable trees based on a hierarchical set of criteria, with specific guidelines for trees with minor defects, forked structures, or varying levels of damage. Trees 20 inches in diameter at breast height (DBH) and larger are automatically designated as leave trees for spacing purposes.
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ATTACHMENT A
127EAT25S0000
FY25 Sierra Pelona Landscape Integrated Fuels Live Tree Selection Specifications Attachment
The Contractor shall select trees to be cut or left in accordance with these specifications.
Trees that are selected to be left to meet the stocking level or spacing in the treatment levels shall be desirable leave trees. The Contractor shall first select the most desirable leave trees as defined in paragraph one below. In areas where there are not enough trees with the most desirable characteristics available to meet the specified stocking level or spacing, the Contractor shall select less desirable trees as defined in paragraph 2 below. Leave tree species preference: QUKE (California black oak), QUDO (blue oak), QUGA4 (Oregon white oak), QULO (valley oak), QUAG (coast live oak), QUCH2 (canyon live oak), PP ponderosa pine, CP (Coulter pine), SLP (single leaf pinyon), IC (Incense cedar), AC (Aleppo pine), KP (knobcone pine), and other non-native trees.
1. Most Desirable Leave Trees: Trees that possess the following characteristics shall be the first choice for desirable leave/residual trees.
a. Dominant Trees: Trees which are taller than the average height of the trees that form the average canopy of the stand. These trees have healthy crowns.
b. Co dominant Trees: The trees that form the average canopy when compared to other trees in the unit. These trees are not severely suppressed and have good healthy crowns.
c. Healthy Foliage: Foliage shall be dark green in color with a full crown over one third or more of the trees.
d. Straight Bole: The bole or stem of the tree shall be relatively straight. Trees shall have a single branch terminal.
e. Free of Physical Damage: Trees shall not have physical damage from fire, animals or weather on more than one-third of the circumference of the bole or more than three feet of length of the bole.
f. Free of Disease Damage: Trees shall not have disease damage such as dwarf mistletoe or gall rust. Symptoms of gall rust are galls on the branch and stem.
g. Free of Insect Damage: Trees shall not have insect damage from Bark Beetles. Symptoms of Bark Beetles are dead tops and/or small red to yellowish pitch tubes (less than one-fourth inch) with boring dust in bark crevices and around the base of tree.
h. Desirable Species: See list of species preference in Line Items under Thin.
2. Less Desirable Leave Trees: When the prescribed stocking level or spacing of desirable trees cannot be achieved with trees that possess the most desirable characteristics, the Contractor shall select trees with less desirable characteristics in the priority listed below:
a. Minor Defect: Trees with minor defect such as a sharp crook or a small amount of animal damage.
b. Other Live Trees: Trees other than insect or disease damaged trees with l/4 live crown.
c. Forked Trees: Those trees with two or more terminal leaders.
d. Suppressed Trees: Trees that are severely suppressed, extremely short or nonexistent internodes, twisted gnarled stems or an extreme sparseness of foliage usually characterize them.
e. Physical Damage: Trees that have physical damage on half or more of the bole circumference and greater than three feet in length. Physical damage may be caused by equipment, falling trees, lighting, wind, animals etc.
Trees 20.0 Inches D.B.H. and over: Trees 20.0 inches and over shall not be cut and shall be considered as leave trees for spacing purposes.
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