CrooksCreekRiparianFence.doc

U.S. BUREAU OF LAND MANAGEMENT

LANDER FIELD OFFICE, WYOMING

Crooks Creek Riparian Pasture Fence

SECTION 01009

GENERAL INFORMATION AND REQUIREMENTS

PART 1: GENERAL

1.1

SUMMARY:

A.

Description of Work: The Contractor shall provide all labor, supplies, supervision, tools, materials, equipment, and transportation necessary to remove and dispose of 7,920 feet of old four wire fence including 2 wire gates. Construct approximately 6,864 feet of new two wire lay-down electric fence and 27,456 feet of new 3-wire fence (two barbed:one barbless) and (4) new 16’ 1-3/4-inch diameter steel tube Powder River gates or equivalent -OR- (8) new 8’ double 1-3/4-inch diameter steel tube Powder River gates or equivalent at four locations along the fenceline. All measurements are to be verified by the contractor. Standard drawing Specifications are attached.

B.

Location: The project site is shown on the vicinity maps, location maps and site plans in the drawings package. Project site is remote and access in some areas may be limited. ATV, Horse and/or Hand hauling of materials may occasionally be required.

C.

Work Data Sheet: Designates the type and quantity of work required at the project location, and dimensions required for typical drawings.

D. Salvageable items consisting of wood, posts, and wire, shall become the property of the Contractor. Items which have become the property of the Contractor shall be removed from 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:

ASTM

American Society for Testing and Materials

100 Barr Harbor Dr.

West Conshohocken PA 19428-2959

ASTM A 121 REV A-92

Zinc-Coated (Galvanized) Steel Barbed Wire

ASTM A 123 REV A-89

Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A 153/A 153M-95

Zinc coating (Hot-Dip) on Iron and Steel Hardware

ASTM A 641-92

Zinc-Coated (Galvanized) Carbon Steel Wire

ASTM A 702-89

Steel Fence Posts and Assemblies, Hot Wrought R1994)

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

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

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.

Scope: Submittals include design computations, shop drawings, manufacturers' literature, as‑built drawings, samples, and maintenance manuals.

B.

Requirements: Refer to specifications for submittals required. Allow at least five working days for review. Submittals shall be delivered to the Contracting Officer.

B. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1.

Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2.

Name of project as it appears in these specifications.

3.

Contract number, drawing number, and specification section number to which the submittal applies.

4.

Whether this is an original submittal or re-submittal.

5.

Each item shall clearly note the manufacturer's name and address, trade name, product, lot, style, color, catalog designation or model number, and locations of use.

1.5

DELIVERY, STORAGE, AND HANDLING:

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

CERTIFICATES OF CONFORMANCE

A.

Requirements: The Contracting Officer may permit use, prior to sampling and testing, of materials when accompanied by Certificates of Conformance. Materials used on the basis of a Certificate of Conformance may be sampled and tested. Installation of materials on the basis of Certificates of Conformance shall not relieve the Contractor of responsibility for incorporating materials which conform to the requirements of the drawings and specifications. Material not conforming to those requirements will be subject to rejection, whether in place or not.

B.

Format: The Certificate of Conformance provided by the supplier shall:

1. State that the named product conforms to the Contract requirements.

2. Either be accompanied with a certified copy of the test results, or certify that such test results are on file with the manufacturer and will be furnished to the Contracting Officer upon request.

3. Provide the name and address of the manufacturer, the testing agency, and the date of tests.

4. Set forth the means of identification which will permit field determination of the product delivered as being the product covered by the certification.

1.7 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.

1.8

PROJECT/SITE CONDITIONS:

Access to the Work:

2. Location should be considered remote and a four-wheel drive vehicle is highly recommended for access to the site. Access to the work shall be by existing roads and two tracks. Construction of access roads to the work site will not be permitted by the Contracting Officer. Driving off road or making new trails is prohibited. Cross-country travel shall be permitted only along and limited to the fence line and only on the BLM managed side.

3. 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. Contractor shall work with The Bureau of Land Management to schedule permissions across private land.

B.

Environmental Considerations:

1. Blading of the fence line will not be permitted. Clearing of vegetation is permitted up to 4 feet either side of the fence line, provided no soil is disturbed.

2. All vehicles, trailers, and power equipment used on the job will be power-washed prior to moving on-site, to prevent spread of weed seeds. Contractor shall submit two copies of the record of when and where each piece of equipment was power-washed.

3. If work is performed during times when livestock are present, August through November, a temporary barrier shall be built in any open areas of the fence when the Contractor is not working on the fence.

1.9

SEQUENCING AND SCHEDULING:

A. Work Schedule: The work 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.

1.10 CULTURAL AND PALEONTOLOGICAL STIPULATIONS

A. Cultural and Paleontological Resources: Any cultural and/or paleontological resource (historic or prehistoric site or object) discovered by the Contractor, or any person working on the Contractor’s behalf, on public or Federal land shall be immediately reported to the CO (contracting officer). The Contractor shall suspend all operations in the immediate area of such discovery until written authorization to proceed is issued by the CO. An evaluation of the discovery will be made by personnel authorized by the CO to determine appropriate actions to prevent the loss of significant cultural or scientific values.

B. Project Specific Cultural Stipulations:

1. CULTURAL RESOURCES, SITE AVOIDANCE. The fence route crosses the Rawlins to Fort Washakie Stage Trail, a significant historical resource. To protect the physical remains and the setting of Trail, all of the fencing visible from the Trail must be installed immediately adjacent to existing two-track roads. All equipment and vehicles used for fence installation and removal must use the existing two-track roads for access. No new ground disturbance will be allowed except for the installation of the temporary fiberglass fence posts and gate posts.

2. To protect the physical remains and the setting of Trail, all of the fencing visible from the Trail must be temporary electric fence and only be in place when necessary to control livestock movement in the area. The fence wire may be laid down immediately adjacent to the existing two-track road.

3. To protect the physical remains and the setting of Trail, all of the fencing visible from the Trail must be constructed of fiberglass posts that are colored to visually integrate into the landscape (e.g. Covert Green [18-0617 TPX]).

4. To protect the physical remains and the setting of Trail, all of the fencing visible from the Trail must be constructed using nonreflective wire that is of a dull luster and a color that will blend in with the natural vegetation growing around the Trail crossing area.

5. To protect the physical remains and the setting of Trail, the

6. temporary gate crossing the Trail must be specially designed to be small, as visually non-impacting as possible, and removable. The gate posts must be fiberglass posts that are colored to visually integrate into the landscape (e.g. Covert Green [18-0617 TPX]).

7. To protect the physical remains and the setting of Trail, the charging system for the electric fence, including any solar panels, batteries, or other necessary facilities, must be installed where it is not visible from the Trail.

8. All visible resource disturbances (ruts, dirt piles, disturbed or broken vegetation, dislodged rocks, etc.) created during fence construction will need to be properly repaired/reclaimed/removed as to be imperceptible from the Trail.

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 planned for the project and present the submittals requested in the specifications.

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.

3.3

SALVAGEABLE ITEMS

A.

Requirements: Salvageable items shall become the property of the Contractor. Items which have become the property of the Contractor shall be removed from the work site.

3.4

DISPOSAL OF DEBRIS

A. Requirements: 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. Disposal of materials in a legal manner and payment of fees required is the Contractor's responsibility. Sale of material onsite is not allowed unless authorized in writing by the Contracting Officer. Burning of removed materials is not permitted on the work site.

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

SECTION 02824

WIRE FENCES AND GATES

PART 1: GENERAL

1.1 SUMMARY

A.

Section Includes: Furnishing and installing approximately 6,864 feet of new two wire lay-down electric fence and 27,456 feet of new 3-wire fence (two barbed:one barbless) and (4) new 16’ 1-3/4-inch diameter steel tube Powder River gates or equivalent -OR- (8) new 8’ double Powder River gates 1-3/4-inch diameter steel tube Powder River gates or equivalent at four locations for a complete fence line according to the contract. The Contractor shall provide all labor, supplies, supervision, tools, materials, equipment, and transportation necessary to remove and construct the Crooks Creek Riparian Fence in accordance with the contract. All measurements are to be verified by the contractor.

1.2 SUBMITTALS

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

B. Certificates of Conformance: Submit three copies of written certification from the treating plant stating that chemicals and methods used for wood preservation and net amount of preservative retained are in conformance with applicable standards and Section 06312 - Preservative-Treated Poles and Posts.

1.3 QUALITY ASSURANCE

A.

General: Contractor-furnished gates and accessories will be approved by the Contracting Officer before installation.

PART 2: PRODUCTS

2.1 CONTRACTOR‑FURNISHED MATERIALS

A.

Barbed Wire: A strand of two 12 ½ gauge galvanized wires twisted together with 2‑point barbs of 14 gauge wire spaced 4 inches apart. Wire and barbs shall be zinc‑coated steel, with a zinc coating of at least 0.3 oz/ft2 of coated surface area. The minimum breaking strength of each wire shall be 950 lb. force. The barbed wire shall conform to ASTM A 121.

B.

Smooth Wire (Barbless): A strand of two 12 ½ gauge galvanized wires twisted together. Wire shall be zinc‑coated steel wire of at least 0.3 oz/ft2 of coated surface area. The minimum breaking strength of each wire shall be 950 lb.‑force. The barbless wire shall conform to ASTM A 121.

C. Staples: Bright‑finish or galvanized 9 gauge with 2 inch length.

D. Wire Fence Stays: Twisted wire fence stays manufactured from smooth galvanized 9 ga wire.

E.

Bolt or Allthread Fasteners: Galvanized 3/8”, length variable based on post and rail/pole but final assembly including washer/lockwasher/nut can protrude on each side by 1.5 inch maximum. Final assembly on all threaded ends must include washer/lockwasher/nut in that order with the washer next to the wood surface.

F.

Nails: 60d ring shank

G.

Wood Posts and Braces:

1. Acceptable Wood Posts and Braces: Sound single-stem Lodge pole Pine. A slight bend in one plane is acceptable. Posts and brace rails may be full stem members, sawed members of square cross section, or split members. Sawed members shall be 4 x 4 rough sawn. Minimum cross-sectional area at the small end for split members shall be 10 in2.

2. Basis for Rejection: Posts are not acceptable when sweep causes a straight line joining the center of the top to the center of the butt to fall outside the body of the post, or at a point 2 inches or more from the center of the post. Posts that are charred, twisted, rotted, or excessively bent are not acceptable. Seasoning checks, single or opposite each other with a sum total equal to or more than ½ the thickness of the post are not acceptable.

3.

Preservative: Material shall be sound, free of decay and end splits. The following species are acceptable when preservative‑treated for the full length: ponderosa pine, southern pine, lodgepole pine, western hemlock, western larch, Douglas‑fir and tamarack (eastern larch).

H. Wood Poles/Rails: Poles/rails shall be of black or honey locust, spruce, lodgepole pine or seasoned red or white oak. Bark shall be removed. Dimensions of posts/rails shall be Length: 16 foot. Diameter: 4 inch to 5 inch with 4 inch diameter minimum.

I. Brace Wires: Four wires of 9‑ga smooth, galvanized wire or 2 wires of galvanized, 12‑1/2‑ga barbless wire. The minimum weight of zinc coating for 9‑gauge wire shall be at least 0.4 oz of zinc/ft2 of coated surface area; for 12‑1/2‑ga wire at least 0.3 oz of zinc/ft2 of coated surface area.

J. Miscellaneous Wire: Wire for ties, gate loops and fastening wood stays shall be 9 or 12‑1/2‑ga galvanized wire.

K. Clip Type Wire Fastener: Galvanized wire, 8-11 gauge.

L. Crimp Sleeves: Shall be of acceptable manufacture for use on high-tensile smooth wire.

M. Steel Fence Posts: ASTM A 702; painted green with white or silver tops "T" or "U" channel bar type, with a welded or riveted anchor plate. Furnish with clip type wire fasteners (punched tabs for fastening wires are not acceptable). Steel posts shall be manufactured from wrought, rail, or new billet steel, and shall have a minimum weight of 1.33 lb/lin ft. The anchor plates shall weigh a minimum of 0.67 pounds +5 percent, and be a minimum of 18 inch2 in area.

2.2

GOVERNMENT FURNISHED MATERIALS

(no applicable Government Furnished Materials)

PART 3: EXECUTION

3.1 PREPARATION

A.

Clearing: Maximum clearing width is 4 feet on each side of the fence-line. Provide minimum disturbance to existing vegetation. Blading is prohibited. Dispose of debris in accordance with Section 01009.

3.2 INSTALLATION

A. General: Steel posts shall not be used for end panel, corner panel, gate panel, or stress panel posts. Set wood posts in dug or drilled holes unless written authorization is obtained for driving line posts. When treated members must be bored or cut during construction, thoroughly swab untreated surfaces with copper naphthenate.

B.

Setting Posts: Dig holes for setting wood posts to the depth as shown on the Work Data Sheet. Set posts plumb and to the spacing and grades as shown on the drawings, unless staked otherwise. Space within 6 inches of that dimension shown on the drawings or in the Work Data Sheet. Holes shall provide adequate open space around the post so backfill can be tamped the full depth around the post. Backfill gradually and uniformly with soil around each post. Compact backfill firmly from the bottom of the hole to the ground surface.

C.

Driving Posts:

1.

Wood Posts: Drive only when approved by the Contracting Officer. Wood posts to be driven shall be machine‑pointed on the end. Drive posts plumb. Posts that are split, bent or broomed will not be accepted.

D.

Corner Post, Gate Post, Corner Panel, Brace, and End Panel (Stress Panel) Assemblies: Construct as shown on the drawings or as staked in the field. Rock jacks shall not be substituted for these items. Construct stress panels on crests of hills, and a maximum of 1320 feet center‑to‑center for barbed wire sections. In addition, stress panels are required at points between which wire is to be stretched. Construct end panels at the end of fence runs unless shown otherwise on the drawings.

E.

Two-Wire Post and Rail. See drawings and data worksheet (SECTION 02824) for more information and specifications.

F.

Rock Jacks: May be used in rock. Rock jacks shall be constructed as shown on the drawings.

G.

Wire: Stretch tightly and staple to wood posts. Wire is properly stretched when it is springy to the touch. Drive staples crosswise with the grain of the wood. The wire shall be free to move through the staples as it expands and contracts. Terminate wire at each end post, gate post, corner post, or stress panel. Wrap wire around the post two times and tie off by wrapping around the incoming wire a minimum of four times

H.

Brace Wire: Double-loop and twist tight with a stick. Leave one end of the stick long enough to fasten behind the horizontal brace to prevent wire from unwinding.

SECTION 02829

ELECTRIC WIRE FENCES AND GATES

PART 1: GENERAL

1.1 SUMMARY

A. Section Includes: Furnishing an electrified wire fence system.

1.2 SUBMITTALS

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

B. Manufacturer's Literature: Submit three copies of the manufacturer's descriptive data for electrical fence materials to be used on this project.

C. Installation Instructions: Submit three copies of the manufacturer's installation instructions electrical fence materials to be used on this project.

D. Maintenance Instructions: Submit three copies of the manufacturer's maintenance instructions for protecting the materials to be used on this project.

E. Shop Drawings: Submit three copies of shop drawings for electrical fence materials to be used on this project. A bid schedule list of materials shall be furnished with the shop drawings. Drawings shall be the same scale as the full-size Contract Drawings.

F. Certificates of Conformance: Submit three copies of written certification from the supplier of the Contractor-furnished materials to be used on this project showing they conform to the requirements of this specification section.

1.2

WARRANTY

A. Requirements: Materials and equipment furnished under this Contract shall be covered by the most favorable commercial warranties the Contractor gives to any customer for such materials and equipment. The rights or remedies provided herein are in addition to and do not limit any rights afforded to the Government by any other clause of this Contract. With respect to warranties, expressed or implied, from manufacturers or suppliers for materials or equipment furnished under the Contract the Contractor shall:

1. Obtain warranties that would be given in normal commercial practices.

2. Require warranties to be executed, in writing, for the benefit of the Government.

3. Submit warranties to the Contracting Officer prior to the final inspection.

PART 2: PRODUCTS

2.1

MATERIALS

A.

Electrical Line Wire: Non-reflective, single‑strand 12‑1/2‑ga high tensile, minimum diameter of (0.096 inches) galvanized steel wire with minimum weight of zinc coating (0.80 oz/ft2), according to ASTM A 90 shall be used. Tensile strength shall be 185,000 psi or higher.

2.2 Brace Wires:

A. Brace and tie wires for high‑tensile smooth wire systems shall be three loops of 12 ½‑ga high‑tensile smooth wire.

2.3 Electrical Attachments and Burial:

A. Electrical wire for energizer hookup shall be same as fence wire but threaded through ultraviolet (UV) resistant insulating tubing. This tubing shall be used for buried or other electrical or ground connections. This method may be used as an alternate to subparagraphs 2 and 3 below.

B. Insulated electrical wire for burial, shall be Type UP 12‑2 with AWG 12 bare ground, 500 V sunlight resistant cable (all‑copper conductor).

C. Insulated electrical wire, general purpose shall be Type THHN/THWN, AWG 12, single‑strand copper conductor, 600 V, gas‑ and oil‑resistant.

D. Connection of galvanized wire to copper or other dissimilar metal shall be made using high conductivity electric fence tap sleeves which are designed to eliminate galvanic reaction.

E. Insulated and buried electrical wire which runs under a gateway and which has anticipated heavy traffic flow should be enclosed in plastic or steel pipe or tubing.

2.4 Insulators:

A. Terminal function and corner anchor insulators on 20 or more degree change of direction shall be reinforced for use with 12‑1/2 ga wires. Insulators shall be capable of withstanding the same load as the breaking strength of the wire being insulated and long‑term wire pressure.

B. Wood line posts and other non‑tension transfer post insulators shall be of UV‑resistant material and be designed to provide a minimum of ½ inch separation between the wire and post insulators. Insulators shall be compatible with the high tensile wire specified.

2.5 Other Electrical Appurtenances:

A. Electrified line wire disconnect switches shall be rated for not less than the voltage and amperage level of the energizer system.

B. Fence line grounding rods shall be single‑length steel rods no less than ½ inch in diameter and no less than 6 feet in length, complete with compatible ground wire attachment device attached for this application.

C. The lightning arrestor shall be designed for fencing applications compatible with the energizer system provided.

2.6 Warning Signs:

A. Durable metal, fiberglass, or plastic material with integral or weather protected, fade‑resistant lettering. Fit with durable plastic or galvanized fasteners compatible with the 12 ½‑ga line wire. The sign lettering shall read "Electric Fence," and "Warning." The plaque size shall not be less than 4 x 12 inches. A sample approved by the Contracting Officer is required prior to installation at the work site.

2.7 Wood Posts and Braces: Sound single stem members:

A. A slight bend in one plane is acceptable. Posts are not acceptable if a straight line drawn from the geometric center of the top to the geometric center of the butt of the post falls outside of the body of the post. Posts that are twisted, rotted, excessively bent, or have checks extending through the center of the post becoming splits, are considered unsound and are not acceptable. The following species will be acceptable if preservative‑treated to American Wood Preservers' Association Standards for the full length: ponderosa pine, lodgepole pine, fir, and tamarack. Treatment shall be according to Section 06312 ‑ Preservative‑Treated Poles and Posts.

2.8 Fiberglass Line Posts:

A. Heavy‑duty "T"‑shaped type with continuous wire‑anchor deformations, furnished with at least three clip‑type wire fasteners as recommended by the system manufacturer, or smooth, round rods using ultraviolet cold‑resistant fiberglass‑resin, using stainless‑steel clips designed for this application.

2.9 Wire Tensioning Devices (Strainers):

A. Durable galvanized steel, ratchet‑type, in‑line wire strainers compatible with the wire specified.

2.10 Energizer System:

A. The electric fence energizer system shall include components designed and correctly sized to work together. It shall be capable of energizing the type and length of electric fence specified to a minimum of 3,000 V. The system shall be complete with energizer unit and power supply, [two batteries and 120 V battery charger], [one battery with solar generator and battery charging attachment], and ground rod array.

2.11 Energizer Unit:

A. Shall be solid state, capacitor discharge type, rated for operation on [120 V standard commercial ac power] [rechargeable batteries] and it shall meet the requirements of [Underwriters' Laboratory UL 69 or other approved testing agency as follows: Maximum time of output current transient peak measured at the 300 MA level shall not exceed 300 microseconds. The intermittent peak discharge output shall consist of regularly timed pulses of not more than 0.2 sec "on" time and not less than 0.75 sec "off" time per cycle.] [International Commission for Conformity Certification of Electrical Equipment, CEE Publication No. 5 as follows: Maximum period for which instantaneous current exceeds 300 MA shall be 1.5 milliseconds. Maximum duration of impulse shall be 0.1 sec, minimum time interval between impulses 1.0 sec. Maximum quantity of electricity per impulse is 2.5 millicoulombs. Maximum energy discharged per impulse shall not exceed 5.0 J.] Units with rated outputs over 1.0 J shall incorporate some form of control to limit peak output voltage to its rated value. Unit should be capable of two levels of output power set by a manual switch.

2.12 Battery:

A. Rechargeable batteries of the deep discharge type are required. Automotive type batteries are not acceptable. Batteries may be sealed‑gel electrolyte type or wet‑cell, heavy duty industrial type. [Battery shall have adequate capacity to energize the fence for [1 month] [6 weeks] [2 months]. Two identical batteries shall be furnished with the fence so that one can be recharging while the other is being used.] [One battery is required for use with a solar‑powered recharging system. This battery shall have adequate capacity to energize the fence for at least seven consecutive days without any input from the charger.]

2.13 Battery Charger:

A. Solid state type with two charge rates: an initial fast rate until the battery approaches full charge, then automatic change‑over to a finish rate which protects the battery and maintains the proper float voltage. To comply with UL 69, the energizer shall not be connected to a battery while that battery is being charged. Adjustments for both charge rates shall be included. Chargers shall be capable of recharging the battery in 24 hr or less with no excessive or prolonged gassing.] [Solar‑powered battery charger may be a solid state, two rate charger with an initial fast rate of charge automatically changing to a finish rate or a temperature‑compensated solid state, voltage regulator designed to automatically charge the battery without overcharge or discharge back through the solar panel. Charger shall be capable of recharging the battery in not less than ten days when solar insolation is averaging 4 hr per day and the battery is keeping the fence electrified continuously. A written certification is required from the system supplier that the energizer input may remain connected to the battery during solar‑powered recharging without compromising its safety features or exceeding its maximum energy discharge limitation.]

2.14 Solar Panel:

A. Shall utilize semicrystalline photovoltaic solar cells coated with an anti‑reflection coating. Construct cells on a rigid base plate and cover with a top sheet of special tempered diffusing glass. The panel assembly shall be weather tight and corrosion‑proof. It shall include mounting provisions and an integral weather tight junction box. Panel shall have the necessary output voltage and wattage required to keep the battery charged and the fence electrified through and after a period of 7 consecutive sunless days.

2.15 Staples:

A. Durable metal, 9‑ga, hot‑dipped galvanized, 2 inches long.

2.16 Non‑Electrified Wire Gates:

A.

Gates along the electric portion of fenceline must conform to standard three-wire gates provided in the drawings, and be non-electrified, and made to be removable or lay down with the rest of the laydown portion of fence.

2.17 Mechanical Gate Closers:

Assembly must include the following salient features:

A. A rigid steel strap or 9‑ga smooth wire loop 6 inches from the ground securely connected to the gate post and shaped so that the gate stay will be securely held in place.

B. An adjustable cable or chain, or rigid steel strap fastened to a cam lever device located 6 inches from the top of the gate post. The closer must be capable of securely holding the gate stay in place.

PART 3: EXECUTION

3.1

PREPARATION

A.

Clearing: If needed, maximum clearing width is [4] feet on each side of the fence line with minimum disturbance to existing ground, grass, and sod. Clearing if needed the disposal of debris should be according to section 01009.

3.2

INSTALLATION

A. Posts and Braces: Set or drive posts to the depth and spacing shown on the drawings. Driven posts that are damaged beyond serviceability shall be removed and replaced with undamaged posts at no additional expense to the Government.

1. Pre‑drilling of holes for driven posts is at the discretion of the installer. Dig holes for setting wood posts to the depth as shown on the drawings for setting posts. Holes shall be larger in diameter than the posts, with adequate open space around the post so that backfill can be tamped the full depth around the post. Backfill gradually and uniformly with soil around each post. Compact backfill firmly from the bottom of the hole to the ground surface.

2. Except where rock formations prohibit, drive fiberglass posts into the ground to the depth specified. If rock formations prevent driving, excavate or drill holes 18 inches deep and slightly larger than the diameter of the post. Place posts in the holes and grout the post solidly in position.

3. Corner post, gate post, single‑brace, double‑sided pull and end panel assemblies should be constructed as shown on the drawings or as staked in the field. Construct stress panels between every set of in‑line strainers. Construct end panels at the end of fence runs unless shown otherwise on the drawings.

4. For systems using three wires or less and where terrain irregularities are relatively minor and do not warrant use of one of the stress panels or pull assemblies, single wooden line posts 6‑inch minimum diameter and meeting quality described herein and on the drawings shall be installed in lieu of stress panel. On systems of four wires or more, single brace double‑sided pull assemblies shall be installed.

5. Space fiberglass posts or stays uniformly between adjacent posts so that proper wire spacing is maintained throughout the length of the fence.

B. Wire: Wire shall be tightly and uniformly stretched and shall be fitted with 4‑inch tube insulators on line posts or wrap around insulators on end posts and 20 degree turns, and securely attached to fiberglass posts with standard wire clips or round fiberglass‑resin posts with stainless‑steel clips. Wire shall be tightly stretched to a tension of approximately 250 pounds. Fencing wire, including the ground wire shall be insulated from contact with a possible conductor (including wooden posts and wire cross braces) and installed so that there is no danger of shorting the fence due to high winds or minor wire sagging. Electrical line wire (ground and live elements) connections and splices shall be accomplished by use of steel crimped sleeves the same structural strength of the wire. An alternate method of burial of the ground wire is to enclose 12‑1/2‑ga wire in insulating tube. The tube should be aimed down upon exit from the ground to avoid entry of water. An approved equal attachment method will be acceptable. Knotting of the wire for connections will not be acceptable. Electric fence taps, steel crimping sleeves or screw connectors may be used for fence electrical connections in accordance with recommended practices as defined in the National Electrical Code.

C. Energizer Assembly: Install at the location shown on the drawings and as staked on the ground. The complete functioning assembly shall meet the nominal standards of the manufacturers for electrical and physical standards. Install the energizer and battery unit as shown on the drawings. Securely fasten the solar charging array to a wooden post, and orient as recommended by the manufacturer. Assembly electrical connecting wire shall be secured to posts where practical. Drive the ground rod to leave not more than 4 inches exposed.

3.3

FIELD QUALITY CONTROL

A. Testing: The contractor will perform the required testing, recording, and distributing of the results to the CO. The contractor will furnish necessary equipment, labor, and materials to conduct the testing. Testing shall be conducted in the presence of the Contracting Officer, COR and/or PI.

B. Inspection:

1. Equipment: Provide a suitable peak‑reading dial‑type or digital type voltmeter, accurate to + 100 V, for testing the completed electric fence.

2. Voltage Check: Measure the voltage between hot and ground wires at the extreme ends of the fence. This voltage must be at least [1,500] [2,500] V. If it is not, measure the voltage at intervals of 10% of the fence length back toward the energizer. If the measured voltage recovers appreciably at some point, then look for an inadvertent ground on the fence segment between the high and low readings.

3. Grounding Rod Check: Turn off energizer and install a temporary ground on the fence hot wire approximately 300‑400 yards from the energizer location. At the energizer ground rod array, connect the peak reading voltmeter between the rod furthest from the energizer and a temporary ground rod driven at least 1 foot deep within a few feet of this rod. A noticeable voltmeter reading after the energizer is turned on indicates a need for additional ground rods at the energizer grounding array.

4. Electrical Fence System Test: Electrically test the completed energized fence and document the results. Deliver the results to the Contracting Officer. The test procedure and the completed fence system shall meet the standards and conditions recommended by the supplier/manufacturer.

PART 4: MEASUREMENT AND PAYMENT

4.1

METHOD OF MEASUREMENT

Units: The work described in this section will not be measured for payment.

4.2

BASIS OF PAYMENT

A. Payment will be made at the Contract price, as indicated in the Bid Schedule, and will include full compensation for the work described in the Contract.

END OF SECTION

DATA WORKSHEET

SECTION 02824 ‑ WIRE FENCES, GATES, AND LAYDOWN ELECTRIC FENCE

Fence type: 3-Wire

Type of top wire: Barbed.

Type of intermediate wire(s): Barbed

Type of bottom wire: Smooth.

Wire locations/dimensions in inches (spacing):

D: 10”

C: 12”

B: 10”

A: 16”

Line post spacing (L): 16 foot 5 inches

Length of wood posts (H1): 6 foot 6 inches.

Diameter of wood posts: 6 inches.

Depth of wood posts in ground (h1): 2 foot 6 inches.

Length of steel posts (H2): 5 foot 6 inches

Depth of steel posts in ground (h2): 1 foot 6 inches Gate Type: 3-Wire Gates along the electric portion of fenceline must conform to standard three-wire gates provided in the drawings, and be non-electrified, and made to be removable or lay down with the rest of the laydown portion of fence.

DATA WORKSHEET

SECTION 02824 ‑ WIRE FENCES, GATES, AND LAYDOWN ELECTRIC FENCE (cont’d)

Fence type: Double Wire Electric Lay Down Top wire: Non-reflective Smooth 27" from ground (Hot wire)

Bottom Wire: Non-reflective Smooth 24" from ground (Cold wire)

Overall height of the electric fence will be 27" from the ground. Spacing between wires is 3".

Line post spacing (L): 16 foot 5 inches

Fiberglass posts: Must be colored to visually integrate into the landscape (e.g.

Covert Green [18-0617 TPX]).

END OF SECTION

SECTION 02827

FENCE REMOVAL

PART 1: GENERAL

1.1 SUMMARY

A. Section Includes: Removal: Completely removing 7920 feet of existing four wire fencing materials including poles, posts, barbed and smooth wire.

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 and only on the BLM side.

PART 2: PRODUCTS

2.1 MATERIALS

A.

Requirements: Furnish materials required to remove fences. See Section 01009 General Information and Requirements regarding salvaged materials.

PART 3: EXECUTION

3.1 REMOVAL/ERECTION

A. Removal of Existing Fence: Completely remove fences, panels, and gates.

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

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:

Payment will be made at the Contract price, as indicated in the Bid Schedule, and will include full compensation for the work described in the Contract.

END OF SECTION