311100_Clearing_Grubbing.pdf

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WATER SYSTEM CLEARING AND GRUBBING

SECTION 311100

CLEARING AND GRUBBING

PART 1 - GENERAL

1.1 SUMMARY

A. This work shall consist of clearing, grubbing, trimming, removing, and disposing of, or treatment of, live and dead timber, construction slash, stumps and debris within the areas shown on the drawings or designated on the ground. Areas may include but are not limited to: structures, buildings and related appurtenances including solar system, waterlines, valves and drains, trenching, hydrant pads and other areas to be graded.

Also included is the protection from injury or defacement of vegetation and other objects designated to remain and treatment or removal of damaged trees.

B. Work in this contract will include removal of any existing stumps, backfilling of stump holes and grading the areas to match surrounding ground surfaces.

C. All timber, construction slash, stumps and debris from clearing and grubbing shall be removed and disposed off Government lands.

1.2 RELATED WORK IN OTHER SECTIONS

A. Division 31 Section “Structural Excavation, Backfill and Compaction”

B. Division 31 Section “Road and Spur Excavation and Embankment”

PART 2 – PRODUCTS - NOT APPLICABLE

PART 3 – EXECUTION

3.1 CLEARING

A. Clearing Limits:

1. Structures/Buildings: 10 feet outside the extreme limits of the structure or building.

2. Areas to be graded: 2 feet past the intersection of the existing ground with the cut slope and to the toe of fill as applicable.

3. Trenching: 2 feet past the edge of trenching on the existing ground surface as applicable.

B. All trees, stumps, roots, debris and other protruding vegetative material within the clearing limits, not designated to remain, shall be cleared, grubbed, removed and backfilled except the following:

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1. Undisturbed stumps outside the roadway, spur or pull-thru, unit use pad, tent pad or in embankment areas, provided they do not extend more than 12 inches above the original ground (measured from the uphill side); they are no closer than 2 feet to the finished subgrade or 1 foot to any slope surface and they do not interfere with the placement or compaction of embankments.

2. Material in channel changes, rock sections, and ditches that is below the depth of the proposed excavation.

C. Protect existing trees and other vegetation to remain in place, against unnecessary cutting, breaking, or skinning of roots, skinning and bruising of bark, smothering of trees by stockpiling construction materials or excavated materials within the drip line, excess foot or vehicular traffic, or parking of vehicles within the drip line. The

Contractor shall make payment to the Government for unnecessary or excessive damage to live trees to remain as determined by the Contracting Officer.

D. Provide temporary guards to protect trees and vegetation to be left standing.

E. Where any trees are damaged, or where limbs are required to be trimmed or removed because of operations under this contract, or because of interference with new construction, any cutting or removal of limbs or branches shall be done only with prior approval of the Contracting Officer.

F. Solvents, oils, and other material which may be harmful to plant life shall be disposed of in containers and removed from the site. At the completion of the work, any contaminated soil shall be removed and replaced with topsoil.

G. Trees shall be felled into the area being cleared when ground conditions, tree lean, and shape of clearing permit. Controlled felling shall be used that will ensure the direction of fall to prevent damage to property, structures, trees designated to remain, or traffic.

H. All material, besides the stumps, shall be designated as slash and disposed of in accordance with 3.3 A.2.

I. Felling, cutting, and trimming methods shall not cause bark damage to standing timber. Trees with major roots exposed by construction that are rendered unstable shall be felled and disposed of in accordance with the above paragraphs.

3.2 GRUBBING

A. All debris, stumps, roots and other protruding vegetative material within the clearing limits, not designated to remain, shall be grubbed, removed and disposed of, except the following:

1. All roots over 3 inches in diameter within the trenching areas shall be grubbed to a minimum depth of 6 inches below subgrade. Roots over 1 inch in diameter protruding from the excavated slope shall be cut flush with the excavated slope surface.

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2. Fire-dangerous dead trees or unstable live trees, designated by the Contracting

Officer within 200 feet slope distance of the centerline of roads and capable of falling and reaching the roadway shall be cut off not more than 12 inches above the uphill ground line and treated in accordance with Subsections 3.1 and 3.3.

3. Branches on remaining trees or shrubs shall be trimmed to give a clear height of

14 feet above the roadbed unless otherwise shown on the drawings. Tree limbs shall be trimmed as near flush with the trunk as practicable.

4. When grubbing for structures, buildings, and areas to be landscape graded, grub and remove all stumps inside the clearing limits. Grub and remove all roots to a depth of at least 6 inches below the natural ground when fill is required for site grading. When excavation is required for site grading, grub and remove all roots to a depth of at least 6 inches below finished grade.

3.3 STUMP AND SLASH TREATMENT

A. No construction slash shall be deposited in lakes, meadows, streams, or streambeds.

Construction slash that interferes with drainage structures shall be removed immediately.

1. Disposal of Stumps at Landfill or Location as directed by Contracting Officer:

2. The contractor shall meet the following requirements. Stumps shall be removed, disposed and hauled off government lands. Contractor shall haul all stumps off-site for disposal. The nearest approved landfill is the Adobe Buttes Landfill, 1221 Trap Club Road, Phone (970) 835-7999, The landfill is located approximately 45 miles from Lost Lake just west of Eckert, Colorado. The landfill is operated by the Delta County Solid Waste Manager. Contact the manager for fees, hours and load requirements. There is a trailer transfer station located at: North Fork Transfer Station, 36577 K50 Road, Hotchkiss, Colorado.

A second landfill option is: Gunnison County Landfill, 45800 US Highway 50, Gunnison, CO. 81230, Phone (970) 641-5522 or FAX (970) 641-8120.

3. Disposal of Slash at Landfill or Location as directed by Contracting Officer:

4. All other slash material shall be the Contractor’s responsibility and shall meet the following requirements: Haul, remove and dispose of all slash off

Government lands. The nearest approved landfill is the Adobe Buttes Landfill, 1221 Trap Club Road, Phone (970) 835-7999, The landfill is located approximately 45 miles from Lost Lake just west of Eckert, Colorado. The landfill is operated by the Delta County Solid Waste Manager. Contact the manager for fees, hours and load requirements. There is a trailer transfer station located at: North Fork Transfer Station, 36577 K50 Road, Hotchkiss, Colorado.

A second landfill option is: Gunnison County Landfill, 45800 US Highway 50, Gunnison, CO. 81230, Phone (970) 641-5522 or FAX (970) 641-8120.

3.4 UTILIZATION OF TIMBER

A. Contractor shall make payment to the Government for any merchantable timber removed from Government Lands by purchasing a timber sale contract. Timber stored

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and decked in staging or landing areas must be removed by the Contractor from

Government lands within one year of cutting.

B. The Government shall provide the Contractor an estimate of the merchantable timber worth before the contractor purchases the timber sale contract. The Government shall perform all marking and timber cruising with copies of marked plans and an estimate provided to the contractor before the contract clearing and grubbing and timber sale contract purchase work is started.

C. Merchantable timber is timber that meets the following utilization standards:

3.5 UTILIZATION STANDARDS

Species and Product Minimum Piece Specification

Length in Feet Diameter Inside Bark

Live Tree Product Species

All 8 Feet Minimum 3 Inches/Maximum

8 Inches

Dead Trees

All 8 feet Minimum 3 Inches/Maximum

8 Inches

C. Logging methods and utilization shall conform to the following:

1. Felling and Bucking. Felling shall be done to minimize damage to merchantable timber and damage to remaining trees outside of clearing limits. Felling shall be done with saws or shears.

a. Bucking shall be done to permit removal of all minimum pieces set forth in specifications.

2. Utilization and Removal of Timber.

a. Removal from Government Land. Merchantable and Unmerchantable timber designated for removal shall become the property of the Contractor and removed from Government land within one year of cutting.

1) Disposal of Merchantable Timber. Logs meeting utilization standards can be limbed and decked at the staging and landing locations and at locations approved by the Contracting Officer.

Decking shall be done in such a manner that logs are piled parallel one to the other, can reasonably be removed by standard log loading equipment, will not damage standing trees, and will not roll. Decks shall be free of brush and soil. Logs must be removed and disposed of off Government lands within one year of cutting.

2) Disposal of Unmerchantable Timber. Timber on this project that is not considered merchantable shall be removed and disposed of off

Government lands within one year of cutting. Staging/Landing and decking locations as shown on the drawings may be used by the

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contractor for storage areas for a period of one year after cutting before the timber, stumps, logs and limbs must be removed and disposed off Government lands Other storage area locations may be approved by the Contracting Officer.

END OF SECTION