Special_Project_Specifications_299.rtf

SPECIAL PROJECT SPECIFICATION

SECTION 299-COMPOSITE ROAD RECONSTRUCTION

DESCRIPTION

299.01 WORK. This work shall consist of clearing and grubbing, excavation and embankment. Clearing and grubbing shall include treatment of merchantable timber, and disposal of construction slash, including all designated trees. Excavation and embankment shall include drainage excavation, shaping the roadway, including approaches, turnarounds, ditches, and drainage dips, and disposal of all excavated material. Construction of the roadway shall be in conformance with the dimensions SHOWN ON THE DRAWINGS and DESIGNATED on the ground.

CONSTRUCTION

299.02 CLEARING AND DISPOSAL. All trees, snags, downed timber, brush and stumps within the clearing limits shall be removed and disposed of by:

(a)Decking or removing timber meeting utilization standards (merchantable timber).

(b)Decking unmerchantable timber. Logs not meeting utilization standards that are more than 6 inches in diameter and 10 feet or more in length which are suitable for use as firewood, shall be limbed and bucked into lengths not to exceed 32 feet, and placed in stable decks free of brush and soil. Decks shall be located in areas SHOWN ON THE DRAWINGS or DESIGNATED on the ground. Material not suitable for firewood shall be treated under slash treatment methods.

(c)Purchaser shall treat the construction slash by one or more of the following methods as SHOWN ON THE DRAWINGS:

Method A - Incorporation. Construction slash may be incorporated as part of the embankment provided it is distributed to avoid concen-trations or matting, and is covered with a minimum of 18 inches of excavated material. Slash that cannot be incorporated shall be treated by other methods SHOWN ON THE DRAWINGS.

Method B - Windrowing construction slash. When slash is windrowed, it shall be placed approximately parallel to the roadway. The toe of the fill slope may catch or cover the finished windrow,must be covered with a minimum of 18" of excavated material. The windrow shall not hinder equipment during maintenance of the roadway.

Method C - Scattering. Construction slash shall be scattered outside the clearing limits in areas SHOWN ON THE DRAWINGS. Slash shall not be piled higher than 18" above the ground. Limbs having a diameter of between 3" and 6" shall be bucked into lengths not exceeding 6 feet. Material over 6" shall not be scattered, but shall be treated under other slash treatment methods.

R5-17 1 of 3 07/08 299

Method D - Piling for future disposal. Construction slash shall be piled in locations SHOWN ON THE DRAWINGS. Piles shall be free of soil and constructed with smaller slash well mixed with larger slash.

Method E - Piling and Burning. Construction slash shall be deposited in areas SHOWN ON THE DRAWINGS and DESIGNATED on the ground. Piles shall be constructed so that burning does not damage standing trees. If burning is incomplete, the slash remaining shall be repiled and burned until reduced to 20% or less of their original volume and no individual piece remaining shall be greater than four cubic feet in volume. These pieces shall then be scattered, buried, removed or left in place as SHOWN ON THE DRAWINGS.

Method F - Stump placement. Stumps shall be placed at locations SHOWN ON THE DRAWINGS or DESIGNATED IN THE FIELD, and placed on ground that is level or has been leveled in a manner that the stumps will not roll downhill. Stumps shall then be covered with excavated material a minimum of one quarter of the stump volume to prevent their dislodgement. When steep sideslopes prevent the successful placement of stumps, the designated disposal sites shall be used.

Method G - Bury. Construction slash may be buried within the roadway at locations SHOWN ON THE DRAWINGS, or DESIGNATED IN THE FIELD. Buried material shall be covered with a minimum of 24 inches of excavated material and shall not be buried within 25 feet of culverts. Slash that cannot be buried shall be treated by other methods SHOWN ON THE DRAWINGS.

Method H - Chipping. Construction slash up to at least 4 inches in diameter and longer than 3 feet shall be processed through a chipping machine. Chips shall be deposited on embankment slopes or outside the roadway to a loose depth not exceeding 6 inches. Minor amounts of chips may be permitted within the roadway if they are thoroughly mixed with soil and do not form a layer.

Chipping may also be accomplished by use of a roadside brushing machine designed for this specific type of work and capable of chipping trees to 10” diameter. The engineer shall approve in writing the type of brushing machine to be used in lieu of a chipping machine. A2500 gallon minimum water truck shall work with the brushing machine when it is in operation for fire protection.

All piles created under Methods D and E shall have a 15 foot fire break cleared between the piles and the adjacent vegetation.

Slash shall not be deposited within 25 feet of stream courses.

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.

Hazard trees which are outside the clearing limits, marked on the ground, and SHOWN ON THE DRAWINGS, shall be felled and disposed in accordance with (a), (b), or (c).

299.04 EXCAVATION AND EMBANKMENT. The roadway shall be constructed to conform to the typical sections SHOWN ON THE DRAWINGS. Embankment shall be placed by side-casting, end-dumping, or layer placement, as SHOWN ON THE DRAWINGS.

Backslopes shall not be undercut.

Embankment material designated to be layer placed may be end dumped to the minimum depth needed for operation of spreading equipment. Each embankment layer shall be leveled and smoothed before placement of subsequent layers. Hauling and spreading equipment shall be operated uniformly over the full width of each layer, a minimum of three complete passes.

Suitable material shall be placed in layers no more than 12 inches thick, except when the material contains rock more than 9 inches in diameter, in which case layers may be of sufficient thickness to accommodate the material involved. No layer shall exceed 24 inches before compaction.

Rocks too large to be incorporated in the embankment shall be placed on the downhill side, outside the traveled way. Rocks shall be places so that they will not roll or obstruct drainage. Rocks may not be placed against trees, nor hinder the use and the maintenance of the roadbed.

The location and use of borrow material, and any requirements for the removal and disposal of unsuitable or excess material, will be SHOWN ON THE DRAWINGS.

Unless otherwise SHOWN ON THE DRAWINGS, the roadbed shall be shaped to provide drainage of surface water, and finished to the standard ordinarily accomplished by a motor grader. Individual rocks within the roadbed shall not protrude over two inches above the subgrade. The road bed shall be visibly moist during shaping.

Unless otherwise SHOWN ON THE DRAWINGS, the traveled way width shall not exceed the specified dimension by more than two feet.

MEASUREMENT

299.05 METHOD. The method of measurement will be "Designed Quantities" (DQ) in accordance with Section 109.

PAYMENT

299.06 BASIS. The accepted quantities will be paid for at the Contract unit price for each pay item shown in the SCHEDULE OF ITEMS.

Payment will be made under:

Pay Item Pay Unit

299(01) Composite Road Reconstruction . . . . . . . . . . . . . . . . . STA

299(02) Composite Road Reconstruction . . . . . . . . . . . . . . . . . MI

299(03) Composite Road Reconstruction . . . . . . . . . . . . . . . . . L.S.

Instructions. This special project specification will be used on those projects which require chipping of slash, roadway compaction and Lump Sum payment.