A01 1093487 SOW.docx

STATEMENT OF WORK

Kaibab National Forest - North Kaibab Ranger District Mourning Dove Canyon Fence Repair

Scope of Work:

The 2020 Mangum fire damaged approximately 53 miles of allotment fencing on the North Kaibab Ranger District. The purposes of this project are to clear a working right-of-way along the damaged portion of three of those fences, to remove non-salvageable fence materials and to repair/replace those damaged fences. Specifically, this project includes:

1. Clearing three workable rights-of-way (approximately 3,900’ total) along the damaged portion of three fences.

2. Remove and properly dispose of all non-salvageable steel and plastic fence material from the fences.

3. Reconstruct approximately 3,900 feet of wire fence.

All fencing materials will be supplied by the Kaibab NF at the Tanglefoot work center in Fredonia, AZ. Contractor will be required to transport materials from Tanglefoot to the project site and transport all unused new fence material back to the Tanglefoot work center.

Based on negotiated agreements, a skid-steer mountable brush cutter, wire roller and post driver may be provided by the Forest Service to facilitate clearing, removal and installation/repair of fences discussed in this Statement of Work.

Location:

The projects are located approximately 26 miles south-east of Fredonia, AZ along the west slope of the Kaibab Plateau between Mangum and Mourning Dove canyons. The vicinity location and project sites are shown on the attached maps (Figures 1 and 2).

Requirements:

Remove damaged fence material that was damaged in the 2020 Mangum Fire and reconstruct approximately 3,900 feet of new 4-strand wire fence.

All fencing materials will be supplied by the Kaibab NF at the Tanglefoot work center in Fredonia, AZ. Contractor will be required to transport materials from Tanglefoot work center to the project sites and to return any unused materials back to Tanglefoot.

The fence rights-of-way will need to be cleared to a sufficient width (see “Deliverables and Specifications”) to allow access so that damaged fence material can be safely removed, new fencing can be installed and future maintenance on those fences can be accomplished by the grazing permittee.

All damaged and/or non-serviceable fence materials will need to be removed from each fence. Metal posts, wire, clips and staples will need to be removed from the project site and will be recycled by the contractor or delivered to the metal scrap pile at Tanglefoot work center.

The three damaged fences will then be reconstructed or repaired to “like new” condition according to the design specifications shown in the “Deliverables and Specifications” shown below. The replacement fence design will be constructed of barbed & smooth wire with T-posts and steel braces and natural rock features where possible.

Any “tie” into existing fences, natural barriers, or other structures shall equal or exceed the quality of the new fence installation.

Any alterations or additions outside of the statement of work must be approved by the Kaibab NF prior to making adjustments. Federally protected plants, animals, cultural resources, and historically significant properties shall not be harmed or destroyed during the installation of the fence.

All work shall be done in a manner that minimizes soil and vegetation disturbance and the movement of sediment and other pollutants into streams and water bodies. Any engine oil, lubricants, or other chemical pollutants spilled during construction shall be safely collected and properly disposed of by the contractor.

To minimize the spread of non-native seeds into the Forest, all equipment will need to be pressure washed and cleaned by the contractor prior to entering the Forest. Equipment will also need to be inspected by a Forest Service officer prior to entering the National Forest.

Contractor must provide all fire safety equipment on motorized vehicles at all times. At a minimum vehicles must be equipped with an axe, shovel and fire extinguisher.

Access To Project Sites:

Vehicle access to the project sites will be through Forest Road 22.

Fence #1 (Mangum Camp) is expected to be 400 feet in length will have equipment access to approximately 1/3 of it’s length. The remainder of this fence will run uphill and be tied into a natural barrier. Due to steep slope, this portion of the fence will need to be constructed by hand.

Fence #2 (Mangum Camp to Mourning Dove Canyon) is approximately 2,600 feet in length and runs along the edge of Forest road 22. This fence will have equipment access to most of this distance.

FIGURE 1 – PROJECT VICINITY MAP

FIGURE 2 – PROJECT SITE MAP

Fence #3 (Mourning Dove Canyon fence) is approximately 900’ in length and will have equipment access to the lower 300 feet. The remainder of this fence runs up a steep slope and will require materials and tools to be transported by hand or pack horse/mule. Clearing, old fence removal and reconstruction of this portion of the fence will need to be done by hand.

Fence repair locations will be provided on a map along with being flagged before construction is started.

All access to fence locations will be off of existing roads. Equipment/materials will be staged at FS approved locations during fence installation. ATV and UTV’s may be used to transport materials during fence installation with minimal disturbance of soils and prior approval from the FS.

DELIVERABLES and SPECIFICATIONS:

Right-of-Way Clearing:

Right-of-way clearing will be accomplished to the following specifications as topography and natural features allow:

1. Right-of-way will be cleared of brush and trees a sufficient distance to allow small vehicle access (UTV or skid steer) to travel on one side of the fence. This distance should be approximately 15 feet. Both sides of the fence will need to be cleared to allow easy foot access to build and maintain the fence.

2. To remove fuel build up - clear brush and trees within 10 feet from both sides of the fence as follows:

A) All Juniper and Oak under 6 inches in diameter.

B) All Aspen, Ponderosa and Pinion pine under 10 inches in diameter.

C) All dead or dying Aspen, Ponderosa and Pinion pine (regardless of diameter or distance) that are leaning towards and can reasonably be expected to fall across the fence.

D) Lop and scatter all woody brush and tree material away from the fence location. Do not pile material.

E) To speed decomposition, cut or break scattered brush and tree material so the top edge is within 24 inches of the ground surface.

Fence Construction and Repair -

End Brace Assemblies End brace assemblies shall be installed where there is only one direction of pull on the brace assembly, such as at gates or where the fence meets a natural barrier. Horizontal brace assemblies shall be used for all end bracing.

End bracing shall be installed on each side of drainages and stream channels where the fence may be damaged by trapped debris during runoff or flood events.

A diagonal brace may be used instead of an additional horizontal brace where double bracing is needed. The diagonal brace shall be doweled, or welded to the brace post at least 36 inches above the ground.

Figure 3. Figure 4.

Figure 5.

Steel and Concrete Brace Assemblies Steel angle iron or steel pipe set in concrete may be used for end and line bracing. Steel and concrete brace assemblies shall be constructed as single or double span horizontal brace assemblies, or as a diagonal brace assembly.

Steel Brace Assemblies Steel angle iron or steel pipe set in may be used for end and line bracing. Steel and concrete brace assemblies shall be constructed as single or double span horizontal brace assemblies, or as a diagonal brace assembly. Steel pipe posts may be used if they can be driven into the ground at least 36 inches deep into soil that provides a solid, unmovable anchor.

Figure 6

Figure 7

Anchor and Brace Posts All anchor and brace posts shall be set in the ground at least 36 inches. Anchor and brace posts shall be long enough to extend at least 4 inches above the top wire of the fence.

Setting Steel Posts in Concrete Steel pipe posts shall be set in a hole at least 36 inches deep and 12 inches in diameter. The bottom of the steel post shall be placed on a rock. The hole shall be filled with concrete in such a way as to allow the concrete to flow around the base of the post. The top of the concrete shall be mounded above ground level and sloped away from the post to prevent water from ponding around the base of the post. In areas with over 12” average annual precipitation, steel pipe posts shall be capped to prevent precipitation from entering the pipe.

Horizontal and Diagonal Braces Horizontal braces shall be at least 6 feet long and attached to the upper 1/4 of the anchor and brace posts.

Tension Wires for Wooden Brace Assemblies The tension wire on horizontal brace assemblies shall be attached diagonally from approximately 4 inches above the horizontal brace on the brace posts, to just above ground level on the anchor post. The tension wires shall be twisted together until the brace assembly is rigid.

Line Post and Stays Line posts shall be set in a straight line between brace assemblies with not more than 12 inches of deviation.

“T-posts” shall be driven into the ground until the top of the anchor plate is below ground level. Steel “T” posts shall be long enough to be driven into the ground above the anchor plate, and extend 4 inches above the top wire.

Wooden posts or steel pipe shall be used at points in the fence line whenever there is a 5 to 15 degree change fence direction. Double H braces (wood or steel pipe) or trees will be used whenever a 15 degree or greater change in direction is made.

Fence Wire

Wire Spacing Standard 4-Wire 18"- 24"- 34"- 44" Bottom Wire (Type) Smooth barbless wire

Wire Attachment Fence wires shall be firmly attached to the anchor post on each end of a fence section by double wrapping the wire around the anchor post and tying it off.

Wires shall be attached to all line posts using staples, tie wires, or manufactured wire fasteners of good quality.

Figure 8. Wire attachment to T-posts

Tie wires for attaching fence wires to posts shall be 16 gauge or heavier galvanized steel.

Wire Splicing When splicing of wire is necessary, either the “Western Union” or “loop splice” is acceptable.

Figure 9. Western Union Splice

Figure 10. Loop Splice

Fence Line Sections

The maximum line post spacing for standard fence line sections is as follows:

· 20 feet with 3 stays.

Figure 11. Fence Anchors

Fence anchors shall be installed when the bottom wire is more than 6 inches above the design height above the ground.

Anchor weights for holding down fence wires crossing drainages or depressions shall weigh at least 50 pounds or be equivalent to a 1 cubic foot concrete block. They shall be attached with 9 gauge or heavier smooth wire.

Water Gaps Where the fence crosses a drainage more than 40 feet wide, end bracing shall be installed on each side of the drainage. Water gap fence section materials shall equal the quality of the adjoining fence. They shall be assembled as a separate unit to protect the main fence from damage. The ends of the water gap fence wires shall be attached to a separate steel or wooden line post attached to the end brace using lightweight wire or staples that will allow the water gap to break away from the end braces in a flood event without damaging the end braces and adjacent fence sections.

Figure 12. Water Gaps

For deep narrow drainages, a separate fence section can be installed below the main fence. This separate fence section shall not be attached to the main fence.

Figure 13. Swinging Water Gap

Gates Wire gates across roads shall have stays at least every 3 feet to ensure they are visible to vehicles. They shall be secured to the end brace assemblies with smooth 9 gauge galvanized wire, or fence wire.

Affix gate posts to corner/stretch braces. Ensure gate is tight when closed but easy to open and close.

Figure 14. Texas Style Wire Gates

Wire Attachment to Living Trees

Fence wires may be attached to living Douglas Fir, Juniper or Ponderosa Pine trees under the following conditions:

1) Trees are in healthy, growing condition and are free from disease

2) Trees are greater than 18” in diameter

3) Trees must be growing in a vertical or nearly vertical direction

4) Wires and staples must not touch the tree directly when installed and for the future life of the tree (see figure 15).

This will require using a single “nailer” (or wood board at least 1-1/2” thick and 3” across) to attach wires to one side of a tree, or multiple “nailers” if wires are to be wrapped around the tree; 5) a sufficient number of “nailers” shall be used so that, at no time in the future will tree growth result in wires touching the tree; 6) if wires are placed only on one side of the tree, they must be placed so that pressure from the tensioned wires will pull into the tree not away from it.

Figure 15. Wire Attachment to Living Tree

Contractor Furnished Items:

Contractor will furnish all labor and equipment needed for transportation of personnel, equipment and materials to and from the project site.

*Government Furnished Items:

Kaibab NF will furnish the following materials:

T-Posts T-Post clips Cedar posts Lodge poles Timber Screws Staples Barbed wire Smooth wire HDPE Wire Stays Cable wire Nailer boards

*Based on negotiated agreements, a skid-steer mountable brush cutter, wire roller and post driver may be provided by the Forest Service to facilitate clearing, removal and installation/repair of fences discussed in this Statement of Work.

Period of Performance:

The time period for the fence installation is: May 1 to October 31, 2023. Forest closures, impassible road conditions or other unforeseen natural events may require extension of this deadline.

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