ID 527518
Archived
Ada County
Owner Reference: 21-204
Bid Date: 02/26/2020 at 03:00pm
The Contractor will select or reserve the trees based on quality or as specified in the project description or FIC. The Contractor will leave all healthy (disease and insect free), vigorous trees six (6”) inches DBH and larger unless otherwise specified in the project description or by the FIC as a living cull described below. . Surplus trees from two feet (2’) and taller will be mechanically treated by completely severing the stem below the lowest live limb. “Hang-ups” or partially severed stems will not be allowed. Patches may exist within the project area which possess an unusually high density of vigorous healthy larger stems (6 inches DBH and larger). In these areas, the FIC may direct the contractor to increase the stand density accordingly to preserve these larger stems. Stump height for thinning size material will not exceed twelve (12) inches as measured from the uphill side of the tree. Except for crop or leave trees as specified above, mechanically remove the following: (Applies to thinning and cull removal) All whips and other surplus conifer trees to a minimum height as specified in each project description. All hardwood species located within 8 feet of a conifer crop tree which are, in height, within 3 feet to overtopping a crop tree or as directed by the project description or the COR. Leave trees damaged by falling of surplus trees will be felled, or as directed by the forester-in-charge. Trees of poor form and vigor (living culls) to include: Trees with signs of insects and/or disease such as conks, western gall rust, or blister rust bole cankers. Trees with excessive crooks, forks, leaning, or otherwise damaged from previous logging, including trees with “suckers” which is one where the top had died back and the terminal growth is assured by another limb. Trees with less than twenty-five percent (25%) of total height in live green crown. All trees with trunk infections including western white pine trees with lethal blister rust cankers (bole cankers). Western white pine will be selected as a crop tree if it appears to be blister rust resistant and is in vigorous condition. Girdling will be permitted where falling of the tree will cause damage to the crop tree(s). Girdle by two continuous saw kerfs no more than 6-inches apart through the cambium layer around the bole of the tree. For safety considerations, cut no more that one-inch (1”) into the wood beyond the cambium layer. If branch pruning is done on crop trees to clear a way for cutting non-crop trees using chain saws, prune the branches within one-inch of the bole. Do not cut into the bark on the main bole. If branch pruning of western white pine crop trees for blister rust control is required, procedures will be used as per below (numbers 8 and 10), and the attached project description.
Idaho Department of Lands, ID
Patsi Shandera
(208) 334-0200
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Published 02/05/2020 on Construction Bid Source
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