City_of_Columbia_Debris_Removal_Specs.pdf

Construction Specification 8—Mobilization and Demobilization

1. Scope The work consists of the mobilization and demobilization of the contractor's forces and equipment necessary for performing the work required under the contract. It does not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

2. Equipment and material Mobilization shall include all activities and associated costs for transportation of contractor's personnel, equipment, and operating supplies to the site; establishment of offices, buildings, and other necessary general facilities for the contractor's operations at the site; premiums paid for performance and payment bonds including coinsurance and reinsurance agreements as applicable; and other items specified in section 4 of this specification.

Demobilization shall include all activities and costs for transportation of personnel, equipment, and supplies not required or included in the contract from the site; including the disassembly, removal, and site cleanup of offices, buildings, and other facilities assembled on the site specifically for this contract.

This work includes mobilization and demobilization required by the contract at the time of award. If additional mobilization and demobilization activities and costs are required during the performance of the contract as a result of changed, deleted, or added items of work for which the contractor is entitled to an adjustment in contract price, compensation for such costs will be included in the price adjustment for the item or items of work changed or added.

3. Payment Payment will be made as the work proceeds, after presentation of paid invoices or documentation of direct costs by the contractor showing specific mobilization and demobilization costs and supporting evidence of the charges of suppliers, subcontractors, and others. When the total of such payments is less than the lump sum contract price, the balance remaining will be included in the final contract payment.

Payment of the lump sum contract price for mobilization and demobilization will constitute full compensation for completion of the work.

Payment will not be made under this item for the purchase costs of materials having a residual value, the purchase costs of materials to be incorporated in the project, or the purchase costs of operating supplies.

(210-VI-NEH, May 2001) 8-1

CS 8. MOBILIZATION AND DEMOBILIZATION, Cont'd

4. ITEMS OF WORK AND CONSTRUCTION DETAILS

Items of work to be performed in conformance with this specification and the construction details are:

Subsidiary Item, Mobilization and Demobilization

No separate measurement or payment shall be made for Mobilization and Demobilization.

Compensation will be considered as included in the payment for Bid Item, “Debris Removal”.

EWP: Debris Removal – Balls Mill Creek

City of Columbia, MS_________________

NRCS-MS-SDS (8-2) 5-8-2014

NRCS-MS-SDS (251-1) 7-9-04

CONSTRUCTION SPECIFICATION

251. CONSTRUCTION ACCESS ROADS

1. SCOPE

The work shall consist of furnishing all materials and building and maintaining the designated construction access roads including traffic control devices, clearing, excavation, earthfill, surfacing, and drain crossing.

2. LOCATION

The location of access roads needed for construction is identified on the drawings. Rights-of-way have been obtained for these construction access roads. If approved by the Contracting Officer, the Contractor may select additional routes; however, the obtaining of land rights for additional routes shall be the sole responsibility of the Contractor.

3. MATERIALS

Pipe shall meet the requirements of ASTM A 760-88, Standard Specification for Corrugated Steel Pipe, Metallic-Coated for Sewers and Drains.

The gage of the pipe shall be determined from Height-of-Cover Tables for Corrugated Steel Conduits in Handbook of Steel Drainage and Highway Construction Products published by the American Iron and Steel Institute using an H 20 live load and the height of fill for the pipe.

Surfacing material shall conform to the requirements specified in Section 9 of this specification.

4. TYPE OF ROAD

The construction access road shall be a temporary type road sufficient in size and load carrying capacity to convey construction equipment and supplies from public roads through the adjacent property to the construction site. The road shall be excavated, filled and surfaced (if specified) to the typical section shown on the drawings. The road shall be built and maintained in a manner that will provide access of vehicular traffic during the construction season. Satisfactory drainage along the location of the construction roads shall be provided to prevent ponding of water on the adjacent land. The construction access road shall be left in a neat, smooth, trafficable condition after construction has been completed.

5. ROAD CONSTRUCTION

The access road shall be cleared within the right-of-way limit as required for construction. The limits of the areas to be cleared will be marked by means of stakes, flags, tree markings or other suitable methods. Clearing shall be classified as Class A according to Section 2.0 of Construction Specification 1, Clearing. All materials clearing from the designated areas shall be disposed of by burning within the right-of-way limit. The disposal of cleared material by burning shall be accomplished in accordance with Section 7.0 of Construction Specification 1, Clearing.

Excavation shall be classified as common excavation in accordance with Section 2.0 of Construction Specification 21, Excavation. To the extent they are needed all suitable materials

NRCS-MS-SDS (251-2) 7-9-04

from the excavation shall be used in the construction of the road. The suitability of materials will be determined by the Contracting Officer’s Representative. All surplus or unsuitable material will be designated as waste and shall be disposed of within areas shown on the drawings or specified, or within other areas approved by the Contracting Officer’s Representative.

Foundations for earthfill shall be stripped to remove vegetation and other unsuitable material.

All fill materials, except surfacing, shall be obtained from the required excavation or from within the work limits at locations approved by the Contracting Officer’s Representative. Surfacing material shall be obtained specification. Earthfill and surfacing material shall be compacted as required to prevent bulking or dilatancy of the materials under the action of the hauling or compacting equipment.

6. DRAIN CROSSINGS

Culverts or other satisfactory crossings shall be installed at all drains that cross the alignment of the construction access roads. When needed, the Contractor shall install a corrugated metal drain crossing at the entrance of the construction access road into the public road. Culverts shall be installed at a grade that will provide satisfactory drainage, shall have a minimum cover of 1 foot, and unless otherwise allowed by the Contracting Officer’s Representative, shall be left in place after construction operations have been complete.

7. TRAFFIC CONTROL DEVICES

At the entrance of the construction access road into the public road, traffic control devices shall be erected in accordance with the requirements contained in the “Manual of Uniform Traffic Control Devices” published by the U.S. Department of Transportation, Federal Highway Administration. The Contractor shall be responsible for protection, maintenance and replacement, if necessary, of the traffic control devices until construction operations have been completed. Traffic control devices shall be removed prior to final acceptance of the work.

Unless required in Section 9 of this specification, flagmen will not be required.

8. MEASUREMENT AND PAYMENT

Method 1 – For items of work for which specific lump sum prices are established maintaining the access road will be made at the contract lump sum price. Such payment will constitute full compensation for all labor, equipment, materials, supplies, tools and all other items necessary and incidental to the completion of the work including traffic control devices, clearing, excavation, earthfill, surfacing material, and corrugated metal pipes.

NRCS-MS-SDS (251-3) 7-9-04

Method 2 – For items of work for which specific unit prices are established in the contract, the length of the access road will be measured, along the centerline of the road to the nearest foot.

Payment will be made at the contract unit price and shall constitute full compensation for all labor, equipment, materials, supplies, tools and all other items necessary and incidental to the completion of the work.

All Methods – The following provisions apply to all methods of measurement and payment.

Compensation for any item of work described in the contract but not listed in the bid schedule will be included in the payment for the item of work to which it is made subsidiary. Such items and the items to which they are made subsidiary are identified in Section 9 of this specification.

CS 251. CONSTRUCTION ACCESS ROADS, Cont.

9. ITEMS OF WORK AND CONSTRUCTION DETAILS

details are:

Subsidiary Item, Construction Access Road

(1) This item shall consist of constructing and maintaining the construction access road.

(2) The construction access road shall be constructed along the approximate alignment as shown on the drawings.

(3) Corrugated metal pipe (if needed) shall be Class II, Series A or B, and Shape 1 or 3.

(4) A warning sign shall be placed adjacent to each lane of the public road approximately 1500 feet in advance of entrance of the construction access road. The signs shall be 48” x 48” diamond shaped having a black legend and orange background. The signs shall state “Trucks Entering Highway.” They shall be erected before construction commences and removed when heavy equipment will no longer be leaving or entering the site.

(5) No separate measurement or payment shall be made for Construction Access Road.

Compensation will be considered as included in the payment for Bid Item, “Debris Removal”.

EWP: Debris Removal – Balls Mill Creek

City of Columbia, MS_______________

NRCS-MS-SDS (251-4) 5-8-2014

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 downed trees, brush, limbs, root mass, tops, vines, and other washed-in woody vegetative materials lying completely or leaning within 45º 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.

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

Mississippi- EWP 405c-1 September 2005 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 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

Mississippi- EWP 405c-2 September 2005 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 405c-3 September 2005

10. ITEMS OF WORK AND CONSTRUCTION DETAILS

details therefor are:

Unless otherwise approved by the Engineer, work on all sites shall progress from downstream to upstream.

Bid Item, Debris Removal

1. This item shall consist of the removal, hauling and disposal of stream debris as shown on the drawings. Such payment will constitute full compensation for subsidiary items “Mobilization and Demobilization” and “Construction Access Road”.

Mississippi- EWP 405c-4 September 2005