S-10-0296 911_clear_grub_std.doc

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Section 911 -- Clearing and Grubbing

Description

911.01 Work. Work consists of clearing, grubbing, trimming, removing, and disposing of trees, logs, limbs, branches, brush, plants, and other vegetation within the clearing limits. Work includes the felling and disposing of designated trees outside the clearing limits. Also included are the protection from injury or defacement of trees and other objects not designated for removal and the treatment of damaged trees.

Construction

911.02 Clearing Limits. Clear to the dimensions SHOWN ON THE DRAWINGS or 1 foot beyond the fill and backslope catch points, whichever is greater.

911.03 Material to be Cleared. Alder brush shall be cleared back to 6 feet from centerline on both sides. Clearing requires that the entire alder plant be grubbed out. Alders over 6 feet from trail centerline that lean into the trailway shall be cut flush with the base of the plant.

All other trees, logs, limbs, branches, brush, herbaceous plants, and other vegetation within the clearing limits SHOWN ON THE DRAWINGS shall be removed and disposed of, except for the following:

(a) Live, sound, and firmly rooted trees of the size SHOWN ON THE DRAWINGS.

(b) Live brush (except alder) and herbaceous plants between the trailway and the clearing limits that are less than 18 inches in height measured from centerline grade and less than ½-inch in diameter at ground line.

Except as provided above, cut all limbs and branches more than ½-inch in diameter that extend into the clearing limits. Cut limbs flush with the tree trunks or stems or cut at the ground surface as SHOWN ON THE DRAWINGS.

911.04 Damaged Trees. When felling, cutting, or trimming, do not cause bark damage to standing timber. If damage does occur to standing trees, treat the injured trees as directed by the Contracting Officer. Remove and dispose of trees with major roots exposed by construction that are rendered unstable.

911.05 Removal of Stumps. Remove all stumps within the trailbed. Remove stumps located between the edge of the trailbed and the edge of the trailway that cannot be cut flush with the finished slope or that are not tightly rooted.

911.06 Disposal of Clearing Slash, Logs, Stumps, Brush, and Roots. Do not place clearing slash, logs, stumps, brush, or roots in concentrated piles. Scatter all logs, limbs, lopped tops, brush, grubbed stumps, and roots below the trailway and outside the clearing limits, with the following exceptions:

(a) Where the sideslope above the trail is less than 10 percent, material may be scattered above the trail.

(b) Logs may be left on the uphill side of the trail if they are placed so that they will not move into the clearing limits.

(c) At locations NOTED ON THE TRAIL LOG, block the old trail by piling clearing debris to a minimum of 2 feet in depth and 10 feet along the old route or as otherwise NOTED ON THE TRAIL LOG.

Do not place clearing and grubbing debris in water courses, snow ponds, lakes, meadows, or in locations where it could impede the flows to, through, or from drainage structures. Felled trees shall not be left leaning up off the ground against other trees.

Measurement

911.07 Method. Measure the quantities in accordance with Section 906.

Payment

911.08 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM

PAY UNIT

911(01) Clearing and Grubbing

LF

911(02) Individual Tree Removal

EA

911-1 (2/12/2002)