B08_Attachment_2_-_Pine_Grove_Fence_Statement_of_Work.pdf

Statement of Work:

2024 Pinedale Field Office – Pine Grove Exclosure Fence

Pine Grove Exclosure Fencing STATEMENT OF WORK

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Introduction

The work includes removing existing 3 barbed wire, wooden post & wooden Top Rail fence and replacing with a Steel Drill Stem top rail and post, 3 wire fence (2) Barbed and (1) Barbless.

There is a total of 3 separate Exclosures and is approximately 4 miles of fence.

It is the contractor’s responsibility to ensure that livestock does not cross through the opening between when the old fence is removed, and the new fence is constructed.

Specifics for Pine Grove Exclosure Fences:

There is approximately 23,706 lineal feet of existing 3 barbed wire, wooden post & wooden Top Rail fence and 212 lineal feet of Buck and Rail fence. The old fence needs to be removed and disposed according to the requirements in specification section fence removal. There is approximately 20,446 lineal feet of Drill Stem top rail and post, 3 wire fence (2) Barbed & (1) Barbless that will need to be constructed according to the drawings and work data sheets. It will also have (56) three post corners, (40) Lateral Support Braces, (7) 16’ Pipe gates and (1) 12’ Cattleguard.

Location: (T31 N R 109 W Sec 11 & 12)

Deliverables Bids will be accepted based on bid schedule A consisting of bid items related to all 3 segments listed above. All fence Exclosures will be completed under one contract. All work shall follow specifications and drawings.

Project Contacts

Andy Skordas, Civil Engineer Rawlins Field Office

(307) 328-4374 Email: askordas@blm.gov

Joe Cantrell, District Engineer Rock Springs Field Office 307-352-0261 Email: jcantrel@blm.gov

Statement of Work:

2024 Pinedale Field Office – Pine Grove Exclosure Fence

Pine Grove Exclosure Fencing STATEMENT OF WORK

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Location: (T31 N R 109 W Sec 11 & 12)

SECTION 01009

GENERAL INFORMATION AND REQUIREMENTS

Pine Grove Exclosure Fencing GENERAL INFOROMATION & REQUIREMENTS

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PART 1: GENERAL

1.1 SUMMARY:

A. Description of Work:

1. Fence Removal

a. Furnishing labor, and equipment to remove approximately 23,706 lineal feet of existing THREE barbed wire, wooden post & wooden Top Rail fence. Removal of 212 lineal feet of Buck and Rail fence. See section 02827.

b. Location: Work under this Contract is in Sublette County, Wyoming.

Work locations are shown on maps provided in packet.

2. Fence Construction

a. Furnishing labor, equipment, and materials to construct approximately 20,446 lineal feet of Drill Stem top rail and post, 3 wire fence (2) Barbed & (1) Barbless. (56) three post corners, (40) Lateral Support Braces, (7) 16’ Pipe gates and (1) 12’ Cattel guard.

B. Existing Conditions:

1. Removal and Replace Fences: All materials from existing fence, and all other debris created during the removal process shall be hauled from the site and properly disposed of in a legal disposal site in accordance with all local, state, and federal laws.

C. Work Data Sheet: Designates the type and quantity of work required at the project location. Required dimensions for project will be found in project packet and on typical drawings.

D. Debris: All debris created from removal of existing fencing as well as all debris from construction of new steel drill stem post and poles, shall become the property of the Contractor and shall be removed from the work site. The Contractor shall be responsible for disposal of construction debris in a legal manner, and for payment of any fees required. Burning of debris is not permitted on the work site.

1.2 REFERENCES

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms:

Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/ standards referred to herein may be procured by the Contractor, from the following:

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ALSC American Lumber Standards Committee PO Box 210 Germantown, MD 20875

ANSI American National Standards Institute 11 W 42nd St.

New York, NY 10036

AWPA American Wood Preservers' Association P.O. Box 286 Woodstock MD 21163

AWPA C 1-95 All Timber Products, Pressure Treatment AWPA C 5-95 Fence Posts, Pressure Treatment AWPA M 4-95 Care of Pressure Treated Wood Products AWPA P 5-95 Waterborne Preservatives AWPA P 8-95 Oil-Borne Preservatives AWPA P 9-92 Solvents for Organic Preservative Systems

CFR Code of Federal Regulations (Available from the Government Printing Office) N. Capitol St. between G and H St., NW Washington, DC 20402

FS Federal Standard General Services Administration

Specifications Branch Room 6039, GSA Building 7th and D Streets, S.W.

Washington, DC 20407

GSA General Services Administration

F St. and 18th St., NW Washington, DC 20405

OSHA Occupational Safety and Health Administration

US Department of Labor 200 Constitution Ave., NW Washington DC 20210

OSHA 2207-91 Construction Industry

WWPA Western Wood Products Association

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522 SW 5th Avenue, Yeon Bldg.

Portland, OR 97204-2122

1.3 DEFINITIONS

A. Approvals: Approval of the submittals is an indication that the Contractor's submittals have been reviewed and that there are no objections, except as noted.

Approval of deviations shall apply only to those deviations or omissions from the requirements of the drawings and specifications brought to the Contracting Officer's attention in writing. After approval of an item, submit a substitute for approval when the approved item cannot be purchased or delivered in time to avoid delay in completion of the project.

1.4 SUBMITTALS

A. (There are no applicable requirements.)

1.5 DELIVERY, STORAGE, AND HANDLING:

A. Delivery: The Contractor shall protect products incorporated into the work from damage while in transit to the site.

B. Storage: The Contractor shall provide temporary storage facilities for products.

Storage shall comply with the manufacturer’s instructions. The storage area shall permit access for inspection and handling.

C. Handling: The Contractor shall load and unload products in such a manner that protects them from damage.

1.6 QUALITY ASSURANCE:

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This Contract incorporates materials, applications, and tests by reference with the same force and effect as when they were given in full text.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

1.7 PROJECT/SITE CONDITIONS:

A. Access to the Work:

1. Four-wheel drive or ATV vehicles may be necessary for access to the site.

Access to the work shall be by existing roads, two tracks, and marked paths.

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2. Access to the work shall be provided by and at the Contractors expense.

No roads shall be constructed by the Contractor or off-road driving permitted without prior written permission from the Contracting Officer.

3. Contractor shall exercise care to prevent unnecessary surface disturbance to existing grass, vegetation, and to existing roads and two-tracks.

4. Public, State, or private access roads damaged by the Contractor shall be restored, at the Contractor’s expense, to the same condition they were in at the commencement of work.

5. Mowing 5’ of each side of fence centerline is permissible. All debris created by mowing will be disposed of in accordance with all local, state, and federal laws and regulations. All debris disposal is the sole responsibility of the contractor.

B. Environmental Considerations:

1. No blading will be allowed.

1.8 SEQUENCING AND SCHEDULING:

A. Work Schedule: The schedule shall be submitted at the pre-work conference.

When requested, the Contractor shall submit an updated schedule within three calendar days. As a minimum, the estimated start and completion dates shall be shown in the schedule.

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

3.1 PROJECT MEETINGS:

A. Pre-Work Conference:

1. A pre-work conference will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date, and place. The purpose will be to review required work, project drawings and specifications, construction schedules, payroll and payments, and administrative provisions of the Contract.

2. The Contractor, subcontractors, and the persons responsible for coordination of the work shall be present at the meeting.

3. The Contractor shall be prepared to summarize and explain procedures

01009 - 5 planned for the project.

B. Progress Meetings:

1. Meetings shall be held at the project site, or as determined by the Contracting Officer.

2. Meetings may be called by either the Contracting Officer or the Contractor.

Request shall state who should attend and include an agenda.

C. Final Inspection:

1. Meeting shall be held at the project site, or as determined by the Contracting Officer.

2. The Contractor shall notify the Contracting Officer in writing at least 3 working days before the completion date so the Government can schedule final inspection.

3. The Contractor shall require the superintendent to be present during this inspection.

3.2 PREPARATION

A. Work Limits and Control Points: Will be established by the Contracting Officer.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

A. Units: Work described in this section will not be measured for payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section will be made. The Contractor shall include consideration for this item in the bid price for other items of the Contract.

END OF SECTION 01009

SECTION 01505

MOBILIZATION

Pine Grove Exclosure Fencing MOBILIZATION

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A. Section Includes: Preparatory work and operations, including those necessary to the movement of personnel, equipment, supplies, and incidentals to the project site; and for other work and operations which must be performed, or costs incurred prior to beginning work on the various items on the project site.

(There are no applicable requirements.)

PART 3: EXECUTION

(There are no applicable requirements.)

PART 4: MEASUREMENT AND PAYMENT

A. Units: Progress payments will be made as follows:

1. When 5% of the original Contract amount is earned from other bid items, 50% of the amount bid for mobilization or 5% of the original Contract amount, whichever is lesser, will be paid.

2. When 10% of the original Contract amount is earned from other bid items, 100% of the amount bid for mobilization or 10% of the original Contract amount, whichever is lesser, will be paid.

Payment: Prices and payment will be full compensation for the work described in this section.

Payment will be made under:

Pay Item Pay Unit

01505(1) Mobilization Lump Sum

END OF SECTION 01505

SECTION 02825

STEEL DRILL STEM FENCES, THREE POST CORNERS, LATERAL SUPPORT

BRACE, AND PIPE GATES

Pine Grove Exclosure Fencing STEEL FENCES AND GATES

02825-1

A. Section Includes: Construction of Steel top rail 3 wire fence.

B. Related Sections:

General Information and Requirements Section 01009 Fence Removal Section 02827

1.2 SUBMITTALS:

A. General: Submittals shall be according to Section 01009 - General Information and Requirements.

1.3 QUALITY ASSURANCE:

A. General: Contractor – All work will be inspected by the Contracting Officer’s Representative before acceptance.

2.1 CONTRACTOR - FURNISHED MATERIALS:

A. General: Contractor – All building supplies and materials will be furnished by the contractor.

3.1 PREPARATION:

A. Clearing: Blading or grubbing will not be allowed. Maximum clearing width is 5 FT on each side of the fence line, mowing/cutting will be allowed. Only vegetation that interferes with the fence shall be removed. All debris shall be disposed of in the immediate vicinity.

3.2 INSTALLATION:

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A. Fence will be post and top rail with 3 wires.

a. Fence will consist of 2 3/8” steel drill stem pipe for both post and top rail.

b. Top 2 wires will be barbed wire.

c. Lower wire will be barbless.

B. All connections will be full welds.

a. Posts will be coped or saddled to accommodate placement of top rail.

C. Post will be spaced at 12’ increments with an expansion joint at least every 500’ feet or as needed (see drawing for expansion joint details).

D. Alignment and Setting of Posts: Set posts plumb, correct spacing, grades, and depths shown on the drawing, unless staked otherwise.

E. Installing Top Rail: Install top rail as shown on the drawings. Details are shown on the work data sheet. Coping (saddling) of post to fit each top rail snuggly onto posts with welded connection.

F. Gates: Install 16’ steel frame gates, see specification Sheet. Locations for gate installation will be staked in the field.

G. Three Post Corners and End Panels: Shall be added at wherever a roll of wire comes to an end, and at points to maintain the integrity of the fence. See Drawing for specifications for three post corners. All corners shall be set and placed by hand. No driven posts for these applications

H. Lateral Support Bracing: Lateral support Bracing shall be place at a minimum of 500 feet from a corner or as needed. She Data sheet for specs.

I. Welding.

a. Fire protection plan will be submitted by contractor and approved by Contracting

Officer.

b. Fire protection plan should include some or all of these mitigation technique as well as any additional technique that the contractor feels would increase their abilities to protect from any fires.

i. Protection from welding slag causing fire such as welding blanket to protect dry vegetation from catching fire directly under welding operation.

02825-3

ii. Flame suppression such as fire extinguisher with sufficient compacity to arrest flames if started.

iii. On site fire watch to provide visual over watch to protect against fires, report, and fight in case of fire.

iv. Water truck on site to provide adequate water to wet area under welding operation before and after welding to reduce threat of vegetation catching fire.

v. Period of performance 15 April – 30 June to further reduce fire risk.

vi. Contractor is ultimately responsible for fire protections and suppression.

A. Units: The construction of the fence will be measured and paid for by the linear foot, as measured along the ground surface next to the completed fence, including distance across gate openings, and drainage crossings. Gate closures are considered incidental to fence construction and will not be measured separately for payment.

B. The installation of the gates will be measured and paid for by each gate installed.

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

02825 (1) Fence Construction Linear Foot 02825 (2) Three post Corner EA 02825 (3) Lateral Support Brace EA 02825 (4) 16’ Steel Pipe Gate EA

END OF SECTION 02825

SECTION 02827

FENCE REMOVAL

Pine Grove Exclosure Fencing FENCE REMOVAL

02827 - 1

1.1 SUMMARY

A. Section Includes: Removing existing Buck & Rail fence and 3 barbed wire top rail wood fence, including all wood, Tee posts, cattle guard, gates, stress reliefs, end panels, drainage crossings, and all debris associated/created during removal process.

B. Requirements: Access roads shall not be constructed along fence lines or to the jobsite unless written approval is granted by the Contracting Officer. Cross-country travel with wheeled or tracked vehicles shall be only to and along fence lines.

C. Do not damage adjoining pasture fences. Leave any posts shared by adjoining fences.

2.1 MATERIALS

A. Requirements: Furnish labor and equipment required to remove fences.

3.1 REMOVAL

A. Removal of Existing Fence: Completely remove all fencing as shown on the Work Data Sheet.

B. Disposal of debris shall be according to Section 01009 – General Information and

4.1 METHOD OF MEASUREMENT

A. Units: Fence removal will be measured and paid for by the linear foot removed as measured along the ground surface next to the fence prior to removal, including distance across gate openings, end, stress, and corner panels and drainage crossings.

SECTION 02827

FENCE REMOVAL

Pine Grove Exclosure Fencing FENCE REMOVAL

02827 - 2

4.2 BASIS OF PAYMENT

section. Payment will be made under:

Pay Item Pay Unit

02827(1) Fence Removal (Wood Post Top Rail & Wire) Linear Foot 02827(2) Fence Removal (Buck & Rail) Linear Foot

END OF SECTION 02827

DIVISION 2 SECTION 02881

SITE WORK WELDED STEEL CATTLE GUARDS

Pine Grove Exclosure Fencing Welded Steel Cattleguards

02881-1

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes: Furnishing cattle guard grids, bases, and accessories.

1.2 REFERENCES

A. American Association of State Highway and Transportation Officials

AASHTO T 99-86 Moisture-Density Relations of Soils Using a 5.5 lb Rammer and a 12-inch Drop

AASHTO T 26 Test for Quality of Water to be Used in Concrete

B. American Society of Testing and Materials

ASTM A 615-82 Deformed and Plain Billet-Steel Bars for Concrete Reinforcement

ASTM C 33-82 Concrete Aggregates

ASTM C 39-83 Compressive Strength of Cylindrical Concrete Specimens

ASTM C 94-83 Ready-Mixed Concrete

ASTM C 143-78 Slump of Portland Cement Concrete

ASTM C 150-83 Portland Cement

ASTM C 260-77 Air-Entraining Admixtures for Concrete

C. American Concrete Institute

ACI 305R-77 Hot Weather Concreting

ACI 306R-78 Cold Weather Concreting

ACI 315-80 Details and Detailing of Concrete Reinforcement

ACI 318-83 Building Code Requirements for Reinforced Concrete

ACI 347-78 Recommended Practice for Concrete Formwork

1.3 SUBMITTALS:

02881-2

A. General: Submittals shall be according to Section 01009 - General Information and

B. Manufacturer's Literature: Submit three copies of the manufacturer's descriptive data including design data for commercial cattle guard grids.

C. Certificates of Conformance: Submit three copies of written certification from the supplier of the Contractor-furnished cattle guards, concrete and reinforcing steel for the bases to be used on this project that they conform to the requirements of this specification section. If concrete for cattleguard base is mixed on site, a design mix shall be submitted to the Contracting Officer for approval prior to pouring bases. The Contractor shall submit shop drawing for fabrication and installation of concrete cattleguard base.

1.4 DESIGN REQUIREMENTS

A. Size: Design cattle guards to have a clear travel roadway width for vehicular treads of not less than 12 feet, with the length along the line of traffic not less than 8 feet.

B. Foundations: Cattle guard foundations shall be precast concrete. Construct the grill units of welded steel members to form a rigid deck. Provide a method of draining the cattle guard through the end of the foundation.

C. Alternate Design: Submit three copies of detailed engineering drawings and material specifications and fabrication instructions. Alternate Designs: Shall be furnished with design calculations and be certified by a Registered Engineer that they meet design requirements.

D. Qualification Record: Submit two copies of the required procedures qualification record.

E. Welding Procedure Specification: Submit two copies of the welding procedure specification.

1.5 QUALITY ASSURANCE

A. Welder Qualifications: As a minimum, the welder shall meet the qualifications for:

Electrodes up to and including E 7018 according to AWS D1.1, Section 5; Steel thickness 3 to 10 mm (1/8 to 3/8 inch); fillet, groove, low-hydrogen welding; or meet code qualifications for structural plate and rolled structural shapes.

PART 2 PRODUCTS

2.1 MATERIALS

02881-3

A. General: Shall be constructed of materials as shown on the drawings and described in these specifications. Design loading of grids and dimensions shall be as shown on the drawings.

B. Hot-rolled structural steel sections: ASTM A 36/36M or AASHTO M 183.

C. Cold-formed rails: ASTM A 242/242M. This type of rail shall be welded with E 7015 or E

7016 electrodes.

D. Structural tube sections: ASTM A 500, Grade B.

E. Steel pipe: ASTM A 53, Schedule 80, or ASTM A 501.

F. Zinc-plated connectors, bolts, and nuts: ASTM A 307, or SAE Grade 8: SAE J 429.

G. Anchor clips: Shall be shop welded.

H. End Wings: Shall be as shown on the drawings.

I. Backfill Material: Shall be native material. Backfill shall be free from rocks, stones larger than 80 mm (3 inches) maximum diameter, sticks, or excess organic materials, and shall be of the best material available onsite.

J. Paint: Color shall be Federal Safety Yellow or match color no. 13655, Fed. Spec. TT-C-595.

Cattle guards shall be painted after fabrication.

K. Cement: Portland cement, Type IIA; ASTM C 150. The use of caked or hardened cement will not be permitted.

L. Water: Water shall be clean and free from harmful amounts of acids, alkalis, and organic materials in accordance with AASHTO T 26. Potable water is acceptable without testing.

M. Aggregates: Fine aggregates shall be natural sand in accordance with ASTM C 33, with fineness modules of not less than 2.5 nor more than 3.0. Coarse aggregates shall be crushed stone or gravel, in accordance with ASTM C 33, with maximum size of 1 ½ inches.

N. Air-Entraining Admixture: Admixture; ASTM C 260.

O. Forming:

1. Design and construct formwork for exposed concrete surfaces with plywood, metal-framed plywood-faced, or other panel type materials to provide continuous, straight, smooth, as-cast surfaces. Furnish formwork in largest practicable lengths to minimize the number of joints. Form material shall be of sufficient thickness to

02881-4 withstand pressure of newly placed concrete without bowing or deflection.

2. Concrete surfaces which will be unexposed in the finished structure may be formed with plywood, lumber, metal, or other materials acceptable to the Contracting Officer.

Provide lumber that is dressed on at least two edges and one side for tight fit.

P. Reinforcing Steel: Reinforcing steel shall not exceed No. 5 bars in size and shall meet the requirements of ASTM A 615, 616, or 617 Grade 40. Store reinforcing steel clear of the ground and protect against rusting and damage. Bundle and tag for identification in accordance with ACI 315, paragraphs 3.5.1 and 3.7.10. Rust, scale, mill, or other coating that will destroy or reduce, bond is not acceptable. Steel reinforcing shall be furnished in full lengths where practicable. Where splices occur, provide a minimum of 24 inches lap and stagger splices. Metal chairs shall be, galvanized or plastic-coated. Design, materials, fabrication, and installation shall comply with the requirements of ACI 318, Chapter 7 and Part 4.

2.2 FABRICATION

A. Welding: Shall be accomplished with AWS E 7018 electrodes, except for cold-formed rails.

B. Steel Cattle Guard Grids: Steel grids shall be all-welded construction. Welds shall be secure and complete along both edges of cross pieces and at joints in the frame and shall conform to

AWS D1.1.

C. Paint: Structural steel shall be cleaned according to SSPC SP-6. Cattle guard grids and end wings shall each receive a prime and finish coat. The prime coat shall be a lead free, zinc-rich, rust-inhibitive alkyd metal primer. Minimum thickness shall be 0.05 mm (1-1/2 mils) dry-film thickness (DFT). The finish coat shall be an oil alkyd-enamel, gloss paint.

Minimum thickness shall be 0.10 mm (3 mils) DFT, applied in two applications.

D. Cattle Guard Foundations: Foundations shall be constructed as specified and shown on the drawings.

2.3 SOURCE QUALITY CONTROL

A. Plant Inspection: The Contracting Officer will inspect during the Government's working hours. There shall be a Contractor's Representative on the site to answer questions.

B. Material Marking: Material to be used in the fabrication process shall be labeled, marked, or otherwise segregated from differing material.

C. Weld Inspection: The quality of the weld shall be "acceptable" under the visual requirements of AWS D1.1, AWS B1.10, and AWS WI, CH16. Unacceptable welds or

02881-5 defects in the welds as detected by visual inspection or by radiographic, penetrant dye, or magnetic particle techniques shall be repaired or removed and replaced by methods acceptable under the applicable AWS welding codes, or the entire piece may be rejected by the Contracting Officer. Repaired or replaced welds shall be re-inspected by the applicable nondestructive testing method.

D. Sandblast Inspection: Notify the Contracting Officer when and where the grids shall be sandblasted so that the Contracting Officer will arrange an inspection of the sandblasting quality prior to paint application.

2.4 MIXES:

A. Concrete Design Mix: Design the mix to provide concrete with the following properties.

1. Type B Concrete: 3000 psi, 28-day compressive strength. The water-cement ratio shall not exceed 6 gallons per sack of cement, inclusive of water in the aggregate. The proportions of aggregate to cement shall produce concrete with a slump of 2 to 4 inches in accordance with ASTM C 143.

2. Air Content: Air content of concrete at the point of placement shall be 4 to 6%.

3. Ready-Mixed Concrete: Ready-mixed concrete that meets the above specifications shall be permitted when approved by the Contracting Officer. The Contracting Officer shall have access to the mixing plant during concrete mixing operations.

PART 3 EXECUTION

3.1 PREPARATION

A. Excavation and Backfill: Initial excavation for cattle guard foundations may be made with power equipment, but over excavation shall be avoided. Over-excavated areas shall be backfilled and compacted to 95 percent of maximum density as determined by AASHTO T 99, Method C. place backfill in layers not exceeding 6 inches in compacted thickness, and mechanically or manually compact each layer before placing the next layer. Drain the area to prevent water from pooling within the excavation.

B. Debris Removal: The Contractor is responsible for the removal of existing cattle guard grids, foundations, wings, and accessories at locations indicated on the plans for new installations. All removed material shall become the property of the Contractor. The Contractor shall be responsible for disposal of material in a legal manner and for payment of any fees required. Burning or burying of removed material is not permitted.

3.2 INSTALLATION

02881-6

A. Excavation and Grade: The excavation for the cattle guards shall be perpendicular to the roadway at the locations shown on the drawings. The subgrade shall be excavated to the depth required to establish the top of the foundation elevation 8 inches above finished subgrade elevation. The cattle guard foundation shall be placed on firm, level and dry undisturbed ground or compacted fill material meeting the requirements of Section 02315 - Excavation, Backfill and Compaction. After installation, backfill and compact the cattle guard with approved specified material compacted to 95 percent of the maximum density according to AASHTO T 99, Method C.

B. Subgrade Taper: Additional subgrade material shall be placed, shaped, and compacted for a distance of 100 feet each side of the cattle guard installation. The additional aggregate material depth shall taper from 8 inches thick at the cattle guard foundation to 0 inches at 100 feet from the cattle guard. The additional surfacing material shall be placed and compacted in accordance with Specification Section 02315 – Excavation, Embankment and Compaction.

C. The grid, end wings and accessories shall be securely bolted in place as per the manufacturer’s requirements and as shown on the drawings.

D. Forms Construction: Construct forms in accordance with ACI 347, Chapters 1 through 4 to the exact sizes, shapes, lines, and dimensions shown. Fabricate forms for easy removal without hammering or prying against concrete surfaces. Provide crush plates or wrecking plates if stripping may damage cast concrete surfaces.

E. Forms Removal: Form oil may be applied to facilitate removal of forms. Formwork not supporting concrete, such as sides of walls and similar parts of the work, may be removed after curing at not less than 50o F for 24 hours after placing concrete, when the concrete is sufficiently hard so as not to be damaged by form removal, and when curing and protection operations are maintained as specified.

F. Reinforcing Steel: One row of reinforcing steel shall be placed in the center of the concrete collar with at least 2 ½ inches of cover. Reinforcement shall be held securely by steel wire, mortar blocks, or metal chairs during the placement of concrete. Reinforcement shall be securely wired in proper position and shall be adequately supported before concrete is placed.

G. Concrete Mixing:

1. Mix materials for concrete in a drum-type batch machine mixer. For mixers of one cubic yard or smaller capacity, mix concrete for a minimum of 1 ½ minutes but not more than 5 minutes after ingredients are in the mixer before the batch is released. For mixers with a capacity larger than one cubic yard, increase the minimum mixing time by 15 seconds for each additional cubic yard (or portion thereof).

02881-7

2. Comply with the requirements of ASTM C 94 and as herein specified for ready-mixed concrete. During hot weather or under conditions contributing to rapid setting of concrete, a shorter mixing time than is specified in ASTM C 94 may be required. When air temperature is between 85 and 90o F, reduce the mixing and delivery time from 90 minutes to 75 minutes. When air temperature is above 90o F, reduce the mixing and delivery time to 60 minutes.

H. Placing Concrete:

1. When concrete cannot be placed within the time frame specified in 3.01 E above, it will not be placed and shall be removed from the jobsite.

2. Water shall be removed from within forms and excavations before and during placement of concrete. Concrete shall be placed only in the presence of the Contracting Officer.

Concrete shall be placed in maximum lifts of 18 inches, and shall be well vibrated, rodded, or spaded into place to fill voids and angles, and to ensure smooth surfaces and dense concrete. Concrete shall be deposited as nearly as is practicable to its final position and shall not be permitted to flow in a manner that will cause segregation of the materials. Concrete must not be dropped more than 5 feet vertically without use of a tremie or similar device. When a bond is desired between a fresh pour of concrete placed against concrete which has set, the surface of the concrete already in place shall be thoroughly cleaned of loose material, and the old concrete shall be soaked with water.

When no bond is desired between the old and the new, the surface of the old concrete that will come in contact with the fresh concrete shall be painted with an asphaltum or other suitable material to prevent bonding.

3. Hot Weather Concreting: ACI 305R.

4. Cold Weather Concreting: ACI 306R. Materials needed for protection shall be on the jobsite before concrete work is started. Do not place concrete on a frozen subgrade or against surfaces having deposits of frost, snow, or ice.

I. Finishing:

1. Immediately after the removal of the forms, remove bulges and projections on exposed concrete by chipping or tooling. Chip honeycombed or other defective areas to solid concrete.

J. Curing: Cure concrete for a period of 7 days from time of placement by use of one of the following methods:

1. The liquid membrane forming compound shall be sprayed on and shall be dry to the

02881-8 touch in not more than four hours from time of application, in accordance with Paragraph 7.1, ASTM C 309. This method of curing shall not be used where additional concrete, mortar, or joint sealant will be placed against the cured concrete.

2. Cover the damp concrete surfaces with impermeable sheets of polyethylene material with joints lapped and sealed to be watertight.

3. Concrete forms left in place may provide proper curing of concrete in contact with the forms. Curing of unformed concrete surfaces shall be by one of the methods shown above and shall begin as soon as the concrete is hard enough to allow application of the curing material. If forms are removed before the end of the 7-day period, curing by use of the liquid membrane forming compound or sheets of polyethylene material shall begin immediately, and shall continue for the remainder of the 7-day curing period.

3.3 PROTECTION:

A. Damaged or Defective Concrete: Concrete that has been damaged by freezing or by any other cause shall be removed and replaced with acceptable concrete at no additional cost to the Government.

PART 4 MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Units: The work described in this section will be measured and paid for as complete units for installation including grids, foundations, wings, and other accessories but not including gates, which are listed separately in the Bid Schedule. Required removal of existing cattle guards, excavation, backfill, compaction, and grading will not be measured for payment, and shall be considered subsidiary this pay item.

4.2 BASIS OF PAYMENT

section. Payment will be made under:

02881(1) Furnish and install 12’ Complete Steel Grid Cattle Guard Assembly (w/o Cleanout), and Precast Concrete Foundation Each

END OF SECTION

WORK DATA SHEET

For

Pine Grove Exclosure Fencing

Pine Grove Exclosure Fencing WORK DATA SHEET

Fence type: Steel drill stem top rail and post, 3 wire fence.

Quantity of Fence (Construction): 20,446 lineal feet

Quantity of Fence (Removal): 23,706 lineal feet of Wood Post & Top Rail & Wire

Quantity of Fence (Removal): 212 lineal feet of Wood Buck & Rail

Top Rail (D): 40 inches from top of top rail to ground level.

Top wire (C): 31 inches above ground level, galvanized 12.5-gauge barbed wire.

Second Wire (B): 25 inches above ground level, galvanized 12.5-gauge barbed wire.

Bottom wire (A): 16 inches above ground level, wildlife friendly smooth galvanized wire, 12.5- gauge.

Length of posts (h1): 7 Feet 4 inches maximum to 6 feet 4 inches minimum.

Line post spacing (L): 12 feet.

Depth (h2): 36 to 48 inches deep so that top of top rail is 40 inches from ground level.

Steel Pipe Gates: 7 each.

Cattle Guard: 1 each, 12 foot wide.

Three Post Corners: 56 each

Lateral Support Braces: 40 each