311000 clearing grubbing.pdf

F5W61607 Combined Support Maintenance Shop - Phase II Ohio Army National Guard Rev. 0 Defense Supply Center Columbus, Ohio 30 January 2009 Bid Final

CLEARING AND GRUBBING 311000 - 1

SECTION 311000 - CLEARING AND GRUBBING

PART 1 - GENERAL

1.1 DESCRIPTION

A. This item shall consist of clearing or clearing and grubbing, including the disposal of materials, for all areas within the limits designated on the plans or as required by the Engineer.

1. Clearing shall consist of the cutting and removal of all trees, stumps, brush, logs, hedges, the removal of fences and other loose or projecting material from the designated areas. The grubbing of stumps and roots will not be required.

2. Clearing, when so designated, shall consist of the cutting and removal of isolated single trees or isolated groups of trees. The cutting of all trees of this classification shall be in accordance with the requirements for the particular area being cleared, or as shown on the plans, or as directed by the Engineer.

The trees shall be considered isolated when they are 40 feet or more apart, with the exception of a small clump of approximately five trees or less.

3. Clearing and grubbing shall consist of clearing the surface of the ground of the designated areas of all trees, stumps, down timber, logs, snags, brush, undergrowth, hedges, heavy growth of grass or weeds, fences, structures, debris, and rubbish of any nature, natural obstructions or such material which in the opinion of the Engineer is unsuitable for the foundation of strips, pavements, or other required structures, including the grubbing of stumps, roots, matted roots, foundations, and the disposal from the project of all spoil materials resulting from clearing and grubbing by burning or otherwise.

1.2 OFFSITE WORK

A. The Contractor shall not enter on any parcel of land, not owned by the Ohio Army National Guard, to start offsite work until he or she has received, in writing form the Engineer, a notification that the land owner has been made aware of the expected date of commencement of the work. The Contractor shall keep his work forces informed as to any conditions or special considerations which affect such offsite work, including but not limited to, the disposition of any timber, wood, and salvaged or waste materials, of any fences, building, ornamentals, etc. which shall remain and the condition the site is to be left in at the completion of the work.

B. Neither the Contractor nor his subcontractors shall enter into any agreement with any land owner to change the conditions of the contract, for better or worse, without the specific written approval of the Engineer.

Defense Supply Center Columbus, Ohio 30 January 2009 Bid Final

CLEARING AND GRUBBING 311000 - 2

1.3 ENVIRONMENTAL CONSIDERATIONS

A. The Contractor shall manage his clearing or clearing and grubbing operations in the best possible manner so as to create the least possible disturbance or pollution to the natural or man made environment. Water sources and drainage courses shall be protected against the infiltration of soil, silt, debris, ashes, fuels, chemicals or other foreign matter. Unnecessary destruction of wild life and wild life habitat will be avoided.

B. Burning of timber and debris shall not be authorized by the Engineer, until the Contractor has obtained a burning permit from the appropriate local authorities. All burning shall conform to the conditions of the burning permit. In addition the Contractor shall control such burning in a manner as to produce the least smoke or air pollutants and provide minimum annoyance to surrounding property owners.

PART 2 - CONSTRUCTION METHODS

2.1 GENERAL

A. The areas denoted on the plans to be cleared and grubbed under this item shall be staked on the ground by the Engineer. The clearing and grubbing shall be done at a satisfactory distance in advance of the grading operations.

2.2 CLEARING

A. The Contractor shall clear the staked or indicated area of all objectionable materials.

Trees unavoidably falling outside limits must be cut up, removed, and disposed of in a satisfactory manner. In order to minimize damage to trees that are to be left standing, trees shall be felled toward the center of the area to be cleared. The Contractor shall preserve and protect from injury all trees not to be removed. The trees, stumps, and brush shall be cut to a height of not more than 12 inches above the ground. The grubbing of stumps and roots will not be required.

B. When isolated trees are designated for clearing, the trees shall be classed in accordance with the butt diameter size as measured at a point 18 inches above the ground level or at a designated height specified in the proposal.

C. Fences shall be removed and disposed of when directed by the Engineer. Fence wire shall be neatly rolled and the wire and posts stored on the airport if they are to be used again, or stored at a designated location if the fence is to remain the property of a local owner or of a civic authority.

Defense Supply Center Columbus, Ohio 30 January 2009 Bid Final

CLEARING AND GRUBBING 311000 - 3

2.3 CLEARING AND GRUBBING

A. In areas designated to be cleared and grubbed, all stumps, roots, buried logs, brush, grass, and other unsatisfactory materials shall be removed, except where embankments exceeding 2 feet in depth are to be made outside of paved areas. In cases where such depth of embankments are to be made, all unsatisfactory materials shall be removed, but sound trees, stumps, and brush can be cut off within 1 foot above the existing ground and allowed to remain. Tap roots and other projections over 1 inch in diameter shall be grubbed out to a depth of at least 18 inches below the finished subgrade or slope elevation.

B. Any buildings and miscellaneous structures that are shown on the plans to be removed shall be demolished or removed, and all materials therefrom shall be disposed of either by burning or otherwise removed from the site. The remaining or existing foundations, wells, cesspools, and all like structures shall be destroyed by breaking down the materials of which the foundations, wells, cesspools, etc., are built to a depth at least 2 feet below the existing surrounding ground. Any broken concrete, blocks, or other objectionable material which cannot be used in backfill shall be removed and disposed of. The holes or openings shall be backfilled with acceptable material and properly compacted.

C. All holes remaining after the grubbing operation in embankment areas shall have the sides broken down to flatten out the slopes, and shall be filled with acceptable material, moistened and properly compacted in layers to the density required in Item 203 of the Construction and Materials Specifications. The same construction procedure shall be applied to all holes remaining after grubbing in excavation areas where the depth of holes exceeds the depth of the proposed excavation.

END OF SECTION 311000