REVISED_-_Stream_Debris_Removal_405-1-405-3_7-2015a.pdf

CONSTRUCTION SPECIFICATION

405c. STREAM DEBRIS REMOVAL

1. SCOPE

The work will consist of the cleanup of storm debris and existing vegetation in the designated streams (channel, canal, waterway, etc.) areas by the removal and disposal of trees, logs, stumps, brush, tops, blockages, rubbish, and debris deposited in and adjacent to the channel and other items as specified in Section 10. The designated sites are as shown on the drawings.

2. ACCESS

Access shall be as designated by the Engineer unless alternate routes are obtained by the Contractor and approved by the Engineer.

3. LIMITS OF WORK

The limits of the work area shall be determined by the Engineer. The limits of the designated stream debris removal area to be removed are 25 feet from top bank unless otherwise specified in Section 10. Unless otherwise approved by the Engineer, access and construction with mechanized equipment shall be limited to one side of the channel. The side of access and construction shall be determined by the Engineer.

4. DEBRIS REMOVAL

Flow obstructions shall be removed by methods including, but not limited to, sawing, cabling, winching, lifting, or dragging or as specified in Section 10.

The following guidelines will be used to determine which trees, stumps, and brush to remove.

The ENGINEER will make the final determination on questionable items.

a. All trees, downed trees, brush, limbs, root mass, tops, vines, and other washed-in woody vegetative materials within the channel top banks shall be removed. All vegetation (trees and shrubs) within the top banks, 3 inches in diameter and larger shall be cut-off within 4 inches of the ground surface. All woody vegetative materials on the top banks lying completely or leaning within 45 degrees of the stream banks shall be removed.

b. Undermined or storm damaged trees within or outside the banks which are still standing but likely to fall into the stream shall be removed.

c. Stumps of downed or undermined trees within the channel banks or bottoms shall be removed.

d. Any root mass, stump or tree located within the channel banks or on the channel bank that has become unstable or that obstructs flow in the channel shall be removed.

Trees designated for removal shall be cut off as near to the ground surface as conventional cutting tools or field conditions will permit.

All building materials, manufactured items, and other loose foreign debris lying completely or partially within the limits of designated areas shall be removed.

Mississippi- EWP 4005c-1 Revised 7-22-2015

Water level in the channel will fluctuate up and down due to rainfall events. The extent of debris removal in the channel cross section is not changed by the fluctuation in the water level. Excavation of soil/sediment shall not be performed, unless otherwise stated in Section 10.

Trees shall be felled in such a manner as to avoid damage to trees left standing or existing structures and with due regard for the safety of persons and property.

Removal of standing trees outside of stream banks is limited to the cutting of severely damaged trees leaning across the channel and other trees as needed to gain access for equipment to points of channel blockage.

The approval of the Engineer or Construction Inspector shall be obtained prior to cutting any "healthy" tree for equipment access.

Unless otherwise approved by the Engineer, access and construction with mechanized equipment shall be limited to one side of the channel. The side of access and construction shall be determined by the Engineer. Access to the channel shall generally be perpendicular to the channel with precautions taken to protect mast producing and stream canopy trees.

Disturbance of the channel bottom and banks, and equipment access areas shall be held to the minimum necessary to allow the construction equipment to remove the debris. Heavy equipment working on wet soil conditions must operate from mats or use other measures as approved by the Engineer to minimize rutting or soil disturbance.

5. DISPOSAL

All foreign debris such as building materials and manufactured items (stoves, refrigerators, washing machines, other household goods, cars, tin, building material, on non organic material etc.) found within the limits of the debris cleanup area shall be hauled to the off-site disposal area(s) that are obtained by the Contractor and approved by the Engineer. The contractor shall be responsible for any fees associated with using the disposal area.

Debris shall be disposed of by hauling to a disposal area provided by the contractor. The contractor shall be responsible for any fees or permits required for placing material in the disposal area.

6. ENVIRONMENTAL REQUIREMENTS

Where the use of heavy equipment is allowed, equipment shall operate adjacent to the stream and not within the stream unless prior approval is granted by the Engineer. Crossing a stream with equipment to gain access to the opposite bank is only allowed with the specific approval of the Engineer or Construction Inspector.

Equipment shall be maintained to prevent fuel, oil, and lubricant spills. Refueling, repairs, and lubrication will be performed at safe distances from the stream. Should fuel leaks, oil leaks or hydraulic pipe rupture occur during construction, the Contractor's operators shall immediately remove the equipment to a safe area and take prompt action to minimize damage and safeguard the site. The contractor or his Superintendent shall immediately report the spill or discharge.

The Contractor shall provide tanks or barrels to be used for off-site disposal of chemical

Mississippi- EWP 4005c-2 Revised 7-22-2015 pollutants such as drained lubricating or transmission oils, greases, etc. produced as a by-product of this work. Washing, fueling or servicing of equipment shall be avoided where spillage or wash water can enter the watercourse.

7. SPECIAL REQUIREMENTS

The Contractor shall submit to the Engineer for review and approval prior to construction, a construction schedule showing the sequence of all work by reaches to be performed.

The Contractor shall exercise care while working in the areas of existing lawns, roads, structures, utilities, railroads, other improvements and cropland. The Contractor shall be responsible for the prompt repair or replacement of any such improvements damaged by his/her operations.

Fences which must be removed for access shall be removed with the minimum damage practical and placed or stacked on the landowner’s property.

Disturbance of the stream banks and the stream bottom will be held to the minimum necessary to remove the debris.

8. EQUIPMENT

Hydraulic excavators, if used, shall be low ground pressure (LGP) machines and be equipped with a stationary or mechanical thumb attachment or have a grapple. The use of rubber tired skidders will not be allowed without prior written approval of the Engineer. When the use of skidders is allowed, they shall be equipped with low ground pressure, high flotation tires.

The contractor shall be required to smooth grade and shape any ruts or stump holes to provide a smooth drainage way.

9. MEASUREMENT AND PAYMENT

Measurement and payment for Stream Debris Removal is lump sum for the item(s) described. Such payment shall be considered full compensation for all labor, equipment, tools, materials, mobilization, demobilization and other items necessary and incidental to complete the work.

Mississippi- EWP 4005c-3 Revised 7-22-2015