e. Supplemental Specifications.pdf

FY25 GAOA Trail Maintenance; NPCNF Supplemental Specifications Page 1

The following requirements are tailored to meet the services required for the deferred trail maintenance on the Nez Perce-Clearwater N.F. and supersede the sections found in the “STANDARD SPECIFICATIONS FOR CONSTRUCTION OF TRAILS AND TRAIL BRIDGES ON FOREST SERVICE PROJECTS, U.S. Customary Units, National Technology and Development Program, 10/30/2014,” All other clauses, definitions, and sections still apply, and are included by reference. The document may be found at: https://www.fs.usda.gov/sites/default/files/trail-specifications.pdf

Section 902—Intent of Contract

902.01 Intent of Contract. The intent of the contract is to provide for maintenance of trails on the Nez Perce- Clearwater National Forest.

The precise details of performing the work are not stipulated except as considered essential for the successful completion of the work. Furnish all labor, material, equipment, tools, transportation, and supplies necessary to complete the work according to the contract.

Description

902.02 This work consists of clearing trail, removing rocks, and maintaining drainage structures as covered by one or all of the following sections:

912 Clearing Limits

912.20 Brush Cutting

912.30. Logging Out

920 Drainage Structures

921.70. Culvert Maintenance

922.40 Waterbar Maintenance

925.30 Ditch Maintenance

927.20 Drain Dip Maintenance

928.20 Check Dam Maintenance

Measurement

902.03 Measure all items listed in the bid schedule per mile (statute mile). Individual counting of trees, or constructed features will not be used.

Payment

902.04 The accepted quantities will be paid at the contract price per mile. Payment will be full compensation for the work prescribed. Payments will be made for the full completion of all work tasks on all miles of the item, as listed in the Schedule of Items. Partial or Progress payments will not be made, except where conditions that could not have been reasonably predicted cause excessive delay, or make completion of the work by contract deadlines impossible.

Section 912 - Clearing Limits https://www.fs.usda.gov/sites/default/files/trail-specifications.pdf https://www.fs.usda.gov/sites/default/files/trail-specifications.pdf

FY25 GAOA Trail Maintenance; NPCNF Supplemental Specifications Page 2

912.00.01 This work consists of clearing, grubbing, trimming, removing, and treating trees, logs, limbs, branches, brush, plants, and other vegetation along with removal of rocks, undermined roots and hazard trees within the clearing limits. Clearing and removal of trees, vegetation and rocks may be covered by one or more of the following subsections:

912.20 Brush Cutting

912.30. Logging Out

912.50. Loose Rock Removal

912.20 - Brush Cutting

912.20.01 This work consists of removing brush, trees less than 4 inches in diameter, and shrubs within the clearing limits.

Construction

912.20.02 General. Remove all limbs of shrubs and trees that extend across or into the clearing limits as SHOWN ON THE PLANS. Saw or cut limbs flush with the tree trunk. Make cuts in a manner that will not tear or strip bark from the trees.

Cut and remove from the clearing limits all woody plants exceeding ½ inch in stem diameter or 12 inches in height.

The maximum size material to be cut under this specification is 4 inches in diameter when measured at a height of 6 inches above the ground on the uphill side of the stump.

Cut all brush and small, woody plants as near flush to the ground surface as possible. When impractical to cut plants flush, the maximum stem length shall be 2 inches.

Remove all woody material for a minimum of 3 inches below the trail tread surface. Fill holes in the trail tread caused by removing woody material with suitable material.

Scatter the clearing debris removed from the clearing limits outside and below the clearing limits. Do not place materials in stream channels, drainage ways, ditches, culvert inlets, or other locations where they would prevent the free flow of water away from the trailbed.

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912.30 - Logging Out Description

912.30.01 This work consists of removing brush, logs, and down trees from the clearing limits.

Construction

912.30.02 Clearing Out. Cut and remove all logs that extend across or into the clearing limits. The portions of cut logs that remain on the upper side of the trail shall be either firmly anchored to prevent sliding or rolling onto the trailway or moved across the trail to the lower side and scattered outside the clearing limits.

Fell all trees over 4 inches in diameter that are leaning into the clearing limits and that are within 10 feet above the trailbed. Stump height of leaning trees that are cut outside the clearing limits shall not exceed 12 inches as measured on the uphill side of the stump. Disposal and payment for the leaning trees described above will be the same as for down logs and trees.

Remove roots and stumps from trees within the trailway that have been uprooted.

Rerouting the trail around windfalls, uprooted trees, and other obstacles will not be permitted. Ramp or reroute sections of the trail tread that have been damaged by uprooted stumps as necessary to provide safe passage on the trail. Payment for such work will be incidental to the specified work item, and no extra payment will be made.

Remove sticks or wood chunks exceeding 2 inches in diameter and 12 inches in length that have fallen onto the trailbed.

Scatter the down trees on the lower side of the trailway outside the clearing limits. Do not place such materials in stream channels, drainage ways, ditches, culvert catch basins or other locations where they would prevent the free flow of water away from the trailbed.

FY25 GAOA Trail Maintenance; NPCNF Supplemental Specifications Page 4

Section 920—Drainage Structures Description

920.00.01. This work consists of maintaining existing drainage structures, including excavation and backfill, selecting and hauling of log and rock materials, and reconstructing catch basins, and headwalls. Maintenance of drainage structures may be covered by one or all of the following:

921.70. Culvert Maintenance

922.40 Waterbar Maintenance

925.30 Ditch Maintenance

927.20 Drain Dip Maintenance

928.20 Check Dam Maintenance

Maintenance

920.00.02 General. Where trail drainage facilities have been plugged and the water has been diverted from the intended channel, remove the debris causing the diversion and return the drainage to the channel. Divert water off and away from the trailbed. If washing or ponding of water has been or is occurring, dig a shallow ditch sloped 2 percent to 5 percent to the downstream side of the trail and 3 inches minimum deep and 12 inches minimum wide across the trail at the point where water enters the trail.

Clean ditches to permit the free flow of water into culverts and/or away from the trail.

Scatter all unusable or unneeded material that is cleared from the drainage structures 3 feet or more beyond and below the trail or drainage facility and out of water courses.

921 – Culverts

921.70. - Culvert Maintenance

Description

921.70.01 This work consists of maintenance of culverts, including excavation and backfill, selecting and hauling of log and rock materials, and constructing catch basins, and headwalls.

Maintenance

921.70.03 Remove debris and soil from catch basins and inlet and outlet ditches and inside culverts to permit the unobstructed flow of water into, through and away from the culvert. Fill and compact with suitable material all disturbed areas in the trail tread over or adjacent to culverts.

922 - Waterbars

922.40. - Waterbar Maintenance

FY25 GAOA Trail Maintenance; NPCNF Supplemental Specifications Page 5

922.40.01 This work consists of maintenance of waterbars, including excavation and backfill, selecting and hauling of log and rock materials, and constructing catch basins, and headwalls.

Maintenance

922.40.03. Clean the upgrade side of all existing waterbars and maintain them as SHOWN ON THE PLANS.

Remove material accumulated against rubber belting waterbars. Use and compact suitable material removed from the upgrade side of all waterbars to bring the trail tread flush with the top of those waterbars on the downgrade side. Remove all debris from the lead-off area of all waterbars that restricts the free flow of water away from the trail.

925 – Ditches

925.30. - Ditch Maintenance

Description

925.30.01 This work consists of maintenance of leadoff ditches, including excavation and backfill.

Maintenance

925.30.02 General. Where ditches have been plugged and the water has been diverted from the intended ditch, remove the debris causing the diversion and return the drainage to the ditch. Clean deposited material and restore ditches as SHOWN ON THE PLANS. Remove all debris from the lead-off ditches that restricts the free flow of water away from the trail.

Clean ditches to permit the free flow of water into culverts and away from the trail.

Scatter all unusable or unneeded material that is cleared from the drainage structures 3 feet or more beyond and below the trail or drainage facility and out of water courses.

927 - Drain Dips

927.20. - Drain Dip Maintenance

Description

927.20.01 This work consists of maintenance of drain dips, including excavation and backfill, selecting and hauling of log and rock materials, and constructing catch basins, and headwalls.

Maintenance

927.20.03 Clean deposited material and restore drainage dips as SHOWN ON THE PLANS. Remove all debris from the lead-off area of dips that restricts the free flow of water away from the trail. Use suitable material obtained by cleaning dips for fill on the downgrade side, removing rock more than 3 inches at its greatest dimension. Compact all material placed in the trail tread.

928 - Check Dams

928.20. - Check Dam Maintenance

FY25 GAOA Trail Maintenance; NPCNF Supplemental Specifications Page 6

928.20.01 This work consists of maintenance of check dams, including excavation and backfill and obtaining and installing rocks.

Maintenance

928.20.03 Clean deposited material and restore check dams as SHOWN ON THE PLANS. Remove all debris from the lead-off area of dips that restricts the free flow of water away from the trail. Use suitable material obtained by cleaning dips for fill on the downgrade side, removing rock more than 3 inches at its greatest dimension. Compact all material placed in the trail tread.