Crab Lake Fencing Amend 001 Pkg.pdf

(210-VI-NEH, May 2001)

Crab Lake Wetland Reserve (WRP) Project Fencing

AMENDMENT 001

Table of Contents

Construction and Material Specifications

Specification Bid Item Title

CS-3 Bid Item #1 Structure Removal (Amendment 001)

CS-92 Bid Item #4 Field Fence Section 2 Fence Rehab (Amendment 001)

Definitions CS – Construction Specification MS- Material Specification CO – Contract Officer COTR - Contract Officer Technical Representative NRCS – Natural Resources Conservation Service Engineer – Same as COTR

Amendment 001 Construction Specification 3—Structure Removal

1. Scope The work shall consist of the removal, salvage, and disposal of structures (including fences) from the designated areas.

2. Marking Method 1—Each structure or structure part to be removed will be marked with stakes, flags, paint, or other suitable method.

Method 2—The area boundaries from which structures must be removed will be marked using stakes, flags, paint, or other suitable method. Structures to remain undisturbed or to be salvaged will be designated by special markings.

3. Removal Method 1—All structures designated for removal in the contract shall be removed to the specified extent and depth.

Method 2—Within the areas so marked, all visible and buried structures identified shall be removed to the specified extent and depth.

4. Salvage Structures or structure parts that are designated to be salvaged shall be carefully removed and neatly placed in the specified or approved storage location. Salvaged structures that are capable of being disassembled shall be dismantled into individual members or sections. Such structures shall be neatly and systematically match marked with paint before disassembly. All connectors and other parts shall be marked to indicate their proper location within the structure and shall be fastened to the appropriate structural member or packed in suitable containers.

Material from fences designated to be salvaged shall be placed outside the work area on the property on which the fence was originally located. Fence wire shall be rolled into uniform rolls of suitable size and neatly piled with other salvaged materials. Posts and rails shall be neatly stacked.

5. Disposal of refuse materials Refuse materials resulting from structure removal shall be disposed of in a manner and at locations specified in section 7 of this specification or in an acceptable manner and at locations approved by the contracting officer. Disposal by burning shall be in accordance with local rules and regulations.

6. Measurement and payment Method 1—For items of work for which specific unit prices are established by the contract, payment for the removal of each structure unit, except fences, is made at the contract unit price. Fences removed or removed and salvaged are measured to the nearest linear foot. Payment for fence removal or removal and salvage is made at the contract unit prices for each type and size of fence.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, and all other items necessary and incidental to the completion of the work.

Method 2—For items of work for which specific lump sum prices are established by the contract, payment for structure removal is made at the contract lump sum price.

Such payment will constitute full compensation for all labor, equipment, tools, applicable permits and associated fees for burning and disposal of refuse, 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 as a contract line item number in the bid schedule, is included in the payment for the item of work to which it is made subsidiary. Such items and items to which they are made subsidiary are identified in section 7 of this specification.

7. Items of work and construction details

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

a.) Bid Item 1, Structure Removal This item shall consist of removing and disposing of all fence posts, wire and associated materials along the alignment of the Section 1 Fence build and Section 3 Fence build sites as shown on the location maps. This includes a minimum of the strand barbed wire fence, gates, steel posts, wood posts and concrete around the posts.

1) In Section 1. Scope; shall apply.

2) In Section 2. Marking; Method 2 shall apply.

3) In Section 3. Removal; Method 1 shall apply.

4) In Section 4. Salvage; shall not apply.

5) In Section 5. Disposal of Refuse Material; shall apply. Disposal shall be off site and the responsibility of the contractor in accordance with local laws and regulations. Burial or burning refuse materials on site are not allowed.

6) In Section 6. Measurement and Payment; Method 2 shall apply. Full compensation for labor, equipment, materials, and supplies that require structural removal as described in this construction specification will be included in BID ITEM #1.

Amendment 001 Revised Construction Specification 92—Field Fence

1. Scope The work shall consist of furnishing and installing field fence, including gates and fittings.

2. Material Material for field fence shall conform to the requirements of Material Specification 591. All wooden posts shall be of the same species, when available.

3. Setting posts Concrete or wood posts shall be set in holes and backfilled with earth except where otherwise specified.

Wood posts may be driven when approved by the engineer. Steel posts shall be driven unless otherwise specified.

Holes for installing fence posts shall be at least 6 inches larger than the diameter or side dimension of the posts.

Earth backfill around posts shall be thoroughly tamped in layers not thicker than 4 inches and shall completely fill the posthole up to the ground surface. Concrete backfill around posts shall be rodded into place in layers not thicker than 12 inches and shall completely fill the posthole to the surface of the ground. Backfill, either earth or concrete, shall be crowned-up around posts at the ground surface.

No stress shall be applied to posts set in concrete for a period of not less than 24 hours following the development of a firm set of the concrete.

4. Corner assembly Unless otherwise specified in section 11, corner assemblies shall be installed at all points where the fence alignment changes 15 degrees or more.

5. End panels End panels shall be built at gates and fence ends.

6. Pull post assembly Pull post assembly (bracing within a section of straight fence) shall be installed at the following locations:

a. In straight fence sections, at intervals not to exceed 660 feet.

b. At any point where the vertical angle described by two adjacent reaches of wire is upward and exceeds 10 degrees (except as provided in section 11 of this specification).

c. At the beginning and end of each curved fence section.

7. Attaching fencing to posts The fencing shall be stretched and attached to posts as follows:

a. The fencing wire or netting shall be placed on the side of the post opposite the area being protected except for installation along curved sections.

b. The fencing wire or netting shall be placed on the outside for installation along curved sections.

c. The fencing wire or netting shall be fastened to each end post, corner post, and pull post by wrapping each horizontal strand around the post and tying it back on itself with not less than three tightly wound wraps.

d. The fencing wire or netting shall be fastened to wooden line posts by means of steel staples.

Woven-wire fencing shall be attached at alternate horizontal strands. Each strand of barbed wire shall be attached to each post. Steel staples shall be driven diagonally with the grain of wood and at a slight downward angle and shall not be driven so tightly as to bind the wire against the post.

e. The fencing wire or netting shall be fastened to steel or concrete line posts with either two turns of 14 gauge galvanized steel or iron wire or in accordance with recommendations provided by the post's manufacturer.

f. Wire shall be spliced by means of a Western Union splice or by suitable splice sleeves applied with a tool designed for that purpose. The Western Union splice shall have no less than eight wraps of each end about the other. All wraps shall be tightly wound and closely spaced. Splices made with splice sleeves shall have a tensile strength no less than 80 percent of the strength of the wire being spliced.

8. Stays Stays shall be attached to the fencing at the spacing outlined in section 11 or as shown on the drawings to ensure maintenance of the proper spacing of the fence wire strands.

9. Crossings at depressions and watercourses Where fencing is installed parallel to the ground surface, the line posts subject to upward pull shall be anchored.

a. If the fence wire or netting is installed parallel to the ground surface, the line posts subject to uplift shall be anchored by means of extra embedment or by special anchors as detailed on the drawings.

b. If the fence wire is installed with the top wire straight and parallel to the ground surface on either side of the depression, extra length posts shall be used to allow normal post embedment. Unless otherwise specified, excess space between the bottom of the fence and the ground shall be closed with extra strands of barbed wire or with netting.

10. Measurement and payment Method 1—The length of each type and kind of fence is measured to the nearest foot along the profile of the fence, including gate openings. Payment for each type and kind of fence is made at the contract unit price for that type and kind of fence. Such payment constitutes full compensation for completion of the work, including fabricating and installing gates.

Method 2—The length of each type and kind of fence is measured to the nearest foot along the profile of the fence, excluding gate openings. Payment is made at the contract unit price for the specified height of fence. The number of each size and type of gate installed is determined. Payment is made at the contract unit price for that type and size of gate. Such payment constitutes full compensation for all labor, material, equipment, 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, is 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 11 of this specification.

11. Items of work and construction details

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

a) This item shall consist of installing a new 5 strand barbed wire and 1 strand hot wire fence as shown on the

Bid Item #3 - Field Fence - Section 1 Fence Build

Section 1 Fence Build location map. This will include all braces, wood and steel posts, corners and gates as shown on the drawings. All wood posts will be installed with concrete in the bottom 2 ft of the hole. A solar fence charger will be included with the bid (with ground rod) attached to the hot wire and located where directed by the inspector. The old fence will be removed as described in CS-3, Structure Removal.

1) In Section 1. Scope; shall apply.

2) In Section 2. Materials; shall apply.

3) In Section 3. Setting posts; shall apply. Posts shall be placed with the bottom 2 ft of the hole filled with concrete and the upper 2 ft as described in Section 3 above. The concrete compressive strength will be a minimum of 3000 psi.

4) In Section 4. Corner assembly; shall apply. Corner assemblies will be installed at all points where the fence alignment changes 20 degrees or more.

In Section 5. End Panels; shall apply. Gate and end panels will be made using a double ‘H’ brace assembly as shown on the drawings.

5) In Section 6. Pull post assembly; shall apply. In Section 6a. line brace intervals shall not exceed 660 ft and will consist of double ‘H’ brace assembly.

Section 6b. shall apply. Section 6c. shall apply.

6) In Section 7. Attaching fencing to posts; shall apply. In Section 7a. the wire will be placed on the side opposite the WRP easement.

7) In Section 8. Stays; shall not apply.

8) In Section 9. Crossing at depressions and watercourses; shall apply. Section

10. Measurement and payment; Method 1 shall apply. Full compensation for labor, equipment, materials, and supplies as described in this construction specification will be made in Bid Item #3.

b) This section is shown as Bid Item #4 - Field Fence - Section 2 Fence Rehab

Section 2 Fence Rehab

1) In Section 1. Scope; shall apply.

on the location drawing. The existing 4 strand fence will be rebuilt by installing double H braces at a minimum of 660 ft, installing double H braces on both sides of each gate and wildlife fence crossing and at the beginning and end of the fence as shown on the location map. A hot wire will be installed along the entire length as shown on the drawings. A solar fence charger will be provided (with ground rod) where shown in the field by the inspector. All existing steel and wood posts, and wire deemed inadequate by the inspector will be replaced and new materials installed as described in this specification and as shown on the drawings.

2) In Section 2. Material; shall apply.

3) In Section 3. Setting posts; shall apply. Posts shall be placed with the bottom 2 ft of the hole filled with concrete and the upper 2 ft as described in Section 3 above. The concrete will be a minimum of 3000 psi.

4) In Section 4. Corner assembly; shall apply. Corner assemblies will be installed at all fence alignment changes of 20 degrees or more.

5) In Section 5. End Panels; shall apply. Gate and end panels will be made using a double ‘H’ brace assembly. Double ‘H’ brace assembly will be used on both sides of each wildlife crossing location.

6) In Section 6. Pull post assembly; shall apply. In Section 6a. line brace intervals not to exceed 660 ft and will consist of double ‘H’ brace assembly.

7) In Section 7. Attaching fencing to posts; shall apply. In Section 7a. the wire will be placed on the side opposite the WRP easement.

8) In Section 8. Stays; shall not apply.

9) In Section 9. Crossing at depressions and watercourses; shall apply. Section

10. Measurement and payment; Method 1 shall apply. Full compensation for specification will be made in Bid Item #4.

c) This item shall consist of installing a new 5 strand barbed wire and 1 strand hot wire fence as shown on the

Bid Item #5 - Field Fence - Section 3 Fence Build

Section 3 Fence Build map. This will include all braces, wood posts, corners, wildlife crossings and gates as shown on the drawings. All wood anchor posts will be installed with concrete in the bottom 2 ft of the hole. A solar fence charger will be included with the bid (with ground rod) attached to the hot wire and located where directed by the inspector. The old fence will be removed as described in CS-3 Structure Removal.

1) In Section 1. Scope; shall apply.

2) In Section 2. Materials; shall apply.

3) In Section 3. Setting posts; shall apply. All anchor posts shall be placed with the bottom 2 ft of the hole filled with concrete and the upper 2 ft as described in Section 3 above. The concrete will be a minimum of 3000 psi. Wood posts placed between anchor posts to be 5-6” diameter by 8 ft long buried 4 ft in the ground.

4) In Section 4. Corner assembly; shall apply. Corner assemblies will be installed at all points where the fence alignment changes 20 degrees or more.

5) In Section 5. End Panels; shall apply. Gate and end panels will be made using a double ‘H’ brace assembly. Double ‘H’ brace assemblies will be used on each side of the wildlife crossing locations.

6) In Section 6. Pull post assembly; shall apply. In Section 6a. line brace assembly intervals not to exceed 660 ft and will consist of double ‘H’ brace assembly.

7) In Section 7. Attaching fencing to posts; shall apply. In Section 7a. the wire will be placed on the side opposite the WRP easement.

8) In Section 8. Stays; shall not apply.

9) In Section 9. Crossing at depressions and watercourses; shall apply. Section

10. Measurement and payment; Method 1 shall apply. Full compensation for specification will be made in Bid Item #5.