1240LU23Q0011 Attachment 1 SOW GAOA Bridger and Bangtrails Trail Facility Restoration.docx

US Department of Agriculture (USDA)

Statement of Work Bridger and Bangtails Trail Restoration Project

Custer Gallatin National Forest

Contents

General Information

1.0 Scope of Work

The work to be accomplished is associated with trail restoration, repair, and heavy maintenance, which shall include but is not limited to, restoring trail to the original trail template, including clearing, grading, blading, removing slough and berm, rocks, roots and stumps from tread and backslope, filling ruts and troughs, reshaping trail tread and backslope, and restoring reshaping and cleaning drainage structures, widening pullouts, reshaping switchbacks, repairing tread failure, and removal of rock and material from landslides and backslope collapse.

Other work includes the installation of road and trail signposts and bulletin boards, including post hole excavation, setting posts and bulletin boards, and filling post holes after installation. Additional work includes excavation for culvert installation.

Trails specified for maintenance in this contract are considered single-track width and are open to motorcycle and all non-motorized use.

Equipment Limitations.

Trail machinery furnished under this contract shall meet the following minimum specifications and equipment requirements.

Item #1 - Mini Compact Trail Excavator:

Restore trail to original trail template, including clearing, grading, blading, removing slough, berm, rocks, roots, and stumps from trail tread and backslope, filling ruts and troughs, reshaping trail tread, and restoring, reshaping and cleaning drainage structures.

Item #2 – Mini Compact Trail Excavator:

Restore existing switchbacks to original template, including clearing, blading, grading, removing slough, berm, rocks, and roots from tread and backslope, filling ruts and troughs, reshaping and widening trail tread and backslope.

Item #3 – Mini Compact Trail Excavator:

Install road and trail signposts and bulletin boards, including post hole excavation, setting posts and bulletin board, and filling post holes after installation. Excavation for culvert installation.

Do not drive metal track equipment directly on metal or concrete structure surfaces. Place a layer of streambed mix material on the structure bottom before operating metal track equipment directly on metal or concrete structure surfaces.

Equipment use may be suspended when soil moisture conditions are not favorable for obtaining a satisfactory result, as determined by the COR or Inspector.

Excavation.

Control excavated material to minimize disturbance to the adjacent channel and banks. Incorporate suitable streambed materials into the project if required gradations are in accordance with contract specifications.

Dewatering.

Dewatering or diversions are required for structure placement and instream work in the adjacent stream channel. Dewatering is not required when constructing isolated or infrequent structures such as single rock, log step and other instream structures in channel reconstruction areas outside 25 feet from the inlet or outlet of the structure. Customize dewatering to the site depending on flow, ground water depths at the time of installation, terrain configuration, and culvert embedment depths. Submit a dewatering plan 15 days in advance of construction. Include in the plan the method (bypass or pumping), number of pumps and capacity required, pump and bypass culvert calculations, location/layout of dewatering operations and equipment, and erosion control measures for dealing with the return flow back to the existing stream channel. The plan will be approved by the CO within 14 calendar days of plan submission.

Dewatering operations shall be capable of passing the estimated average monthly discharge for the stream or other design dewatering flow SHOWN ON THE DRAWINGS or as approved by the CO.

Maintain the dewatering pumping operations to ensure return flow does not exceed State water quality standards. Water pumped from the construction site may require additional filtration by filter bags or other methods (settling basins, gravel filters, etc.) to prevent turbid water from directly entering the stream.

Place additional erosion control measures or cease operations when turbidity exceeds State water quality standards.

Relocate fish contained within the cofferdams before the site is completely dewatered. Place relocated fish in the closest pool upstream of the construction zone.

If trash pumps are used during construction, the intake must be operated and maintained to prevent fish entrapment, entrainment, or injury. If fish are present at the intake, screen the pump intake with woven wire mesh size with opening less than 3/32 inch. Approach velocities shall not exceed a passive velocity of 0.2 feet per second (fps) or an active velocity 0.4 fps.

Rewatering.

Conduct rewatering activities to minimize sediment movement downstream of the site upon completion of instream work. Prior to rerouting stream flow into the new channel, rinse the surface of the streambed to removed fine-grained sediment. After the initial sediment pulse is removed, slowly breach the coffer/diversion dams to avoid a large pulse of water being sent through the newly constructed channel.

Blasting and Rock Removal.

Remove bedrock encountered during excavation to the lines and grades required in the contract. Remove rock by either mechanical means with hydraulic impact hammers / rock breakers, by ripping, or blasting. When explosives are used, do not cause mortality to juvenile fish by transmitting excessive blasting overpressures through the ground to the fish habitat. Limit blasting overpressures to a maximum of 2 psi in occupied fish habitat.

Placed Streambed Simulation Material.

Begin construction from the downstream end working upstream. Changes to this sequence will be allowed on a case by case basis due to poor stream to culvert alignment, traffic requirements, limited access, and preservation of existing trees reinforcing the banks, etc.

Place streambed simulation rock in one or more layers with a maximum layer depth less than 1.5 times the maximum size of the intermediate-axis of the streambed simulation rock, but no greater than 2ft. Place streambed simulation rock by methods that do not cause segregation or damage to the prepared surface. Place or rearrange individual rocks to obtain a uniformly dense, compact, low permeability mass, matching streambed simulation details. Fill voids by machine or hand tamping before placing the next lift. Compact streambed materials with mechanical hand tampers or excavator-operated vibratory plate compactors.

Fill all voids left during placement of streambed simulation rock, boulders, steps, ribs, banks and streambed materials adjacent to footings, concrete structures or corrugated pipes with streambed simulation material. Use water pressure, metal tamping rods, and similar hand operated equipment to force material into all surface and subsurface voids between the structure and rocks, and between individual rocks. Ensure the streambed is sealed to limit permeability.

Notify the CO at least 48 hours in advance of the streambed material installation.

Rock Bedforms (steps, ribs, riffles, banks), Forcing Features (boulders, boulder clusters), and Bank Construction.

Construct bedforms and banks as specified in the contract. Construction will proceed from downstream to upstream. Machine or hand-place rock for banks, steps, and ribs and lock in place with select key pieces of the required size class, along with smaller materials of varying sizes to fill voids. Construct a low flow channel through the center of the channel AS SHOWN ON THE DRAWINGS. Construct steps and ribs so the tops are uneven, containing several high and low points to concentrate water during low flows. Place step and rib surfaces so they are higher at the outside edge of the culvert (culvert wall) and slope down to the outside edge of the constructed low flow channel AS SHOWN ON THE DRAWINGS.

Construct steps with footer rocks placed before the top step rocks are installed AS SHOWN ON THE DRAWINGS. Use footer rocks which are the same size class as the top step rocks. Fill all voids with smaller materials as construction progresses to minimize permeability.

Construct banks out of large blocky key pieces of the required size class AS SHOWN ON THE DRAWINGS. Key and lock smaller materials of varying sizes to fill voids. Bank materials will be hand keyed in place and compacted depending on the size of materials used as designated in the field by the CO. Construct bank faces to be uneven, protrude into the channel, and be rough in appearance. Construct the top of the bank to be fairly uniform. Tie back constructed banks and margins at the edge of the structure walls into the existing stream banks at dimensions similar to those found in the reference reach or AS SHOWN ON THE DRAWINGS.

When single rocks are used as roughness elements and habitat diversity, bury to 50% of the diameter or as SHOWN ON THE DRAWINGS. Fill and compact voids around these structures. When constructed as clusters of particles, key pieces within the cluster will be buried 50% of the diameter or as SHOWN ON THE DRAWINGS.

Notify the CO at least 48 hours in advance of the installation of any streambed, bedform, roughness feature, log structure, or bank construction.

Log and Root Wad Structures.

Locate and place log structures as required in the contract, and/or designated in the field by the CO.

Construct log weirs with cross slope gradients not less than 5(H):1(V), unless SHOWN ON THE DRAWINGS or staked in the field by the CO, and maximum tolerance of 6(H):1(V), unless approved in writing by the CO.

Embed log weirs to a minimum embedment depth of 10 feet beyond bank full widths or half bankfull width on each side, whichever is greater or AS SHOWN ON THE DRAWINGS. When placing habitat logs (overhanging a portion of the stream) that lay on the banks, ensure 2/3 of the log remain behind bankfull width on top of the bank and is entangled in the adjacent trees.

Embed rootwad revetment trunks a minimum of 10 feet behind bankfull width limits or as SHOWN ON THE DRAWINGS. Bury the root to a point where the base of the bol is resting in the bottom of the bank or as required in the contract, and/or designated in the field by the CO.

Acceptance The Government may inspect, sample, or test all work at any time before final acceptance of the project. When the Government tests work, copies of test reports are furnished to the Contractor upon request. Government tests may or may not be performed at the work site. If Contractor testing and inspection is verified by the Government, the Contractor’s results may be used by the Government to evaluate work for acceptance. Do not rely on the availability of Government test results for process control.

Acceptable work conforming to the contract will be paid for at the contract unit bid price. However, work may be rejected at any time it is found by any of the methods not to comply with the contract.

Remove, repair, or replace work that does not conform to the contract, or to prevailing industry standards where no specific contract requirements are noted. Removing, repairing, or replacing work; providing temporary traffic control; and any other related work to accomplish conformity will be at no cost to the Government.

Period of Performance:

The Period of Performance (POP) is estimated to be 06/15/-2023-09/30/2023

The work is to be accomplished approximately ten hours per day, with no restrictions to the days of the week. The workday shall be between the hours of 7:00 a.m. and 6:00 p.m. Workdays may be inconsistent to accommodate weather, soil moisture, or emergency repairs. This schedule may be altered by mutual agreement during the contract period. Contractor shall notify the COR in advance of any request for any significant alteration.

2.0 Background

This contract is to provide services for trail maintenance work on the Bozeman Ranger District, Custer Gallatin National Forest, near Bozeman, Montana.

This contract requires furnishing equipment on a fully operated basis, in good mechanical and operating condition and operated by competent operators, experienced in performing work of the nature required by this contract. The Contractor will provide all equipment, operating supplies, operators, supervision, and support functions necessary to perform the required work on an hourly, per item, and per mile basis.

Contractor Requirements

3.0 Technical Requirements / Tasks

The following is a list of work anticipated, to maintain trails under the contract.

Trail No./Name Total Miles Miles of Restoration Required

4.0 Government Furnished

All posts and bulletin boards are government supplied by the US Forest Service.

5.0 Travel

There are no authorized travel requirements related to this contract.

6.0 Contractor’s Key Personnel

It shall be the responsibility of the Contractor to provide a responsible site foreman to represent the Contractor in the field in all matters under this contract including, but not limited to construction, day-to-day coordination of activities, control over employees and subcontractors, and coordination with local Government personnel. The site foreman shall be designated in writing. They shall be available on site in person to respond to any and all problems during normal working hours. The site foreman shall be responsible for on-site Quality Control.

Site foreman shall maintain on site a file containing the following project documents.

· Executed Copy of the Contract

· Contract Drawings

· Contract Specifications

· Quality Control Plan – (up to date)

· As-Built Drawing – (up to date) if required

· Work Orders

· Modifications

This file shall be maintained and available to the Contracting Officer upon request. If the Site Foreman is replaced, the existing Foreman shall review all documents and ongoing issues with the new Superintendent.

7.0 Safety Requirements

(a) Contractor shall provide two signs stating "Machinery Ahead" with stands. Signs shall be a minimum of 36" x 36" in size with 6" black lettering on an orange background, reflectorized. Signs shall be in good condition and lettering shall be legible. Signs shall conform to U.S. Department of Transportation "Manual of Uniform Traffic Control Devices" (MUTCD), sign W21-3. (See Exibit A). Signs shall be posted at the beginning and end of the daily work area or trail section before work begins.

(b) If a berm is left in a roadway overnight or weekends due to weather conditions or equipment breakdowns, the Contractor shall place a Type I barricade with an operable Type B illuminated warning light at each end of the berm and at maximum spacing intervals of 1000 feet. These devices shall conform to MUTCD (see Exhibit A). If it is necessary to leave a berm in place over a weekend, the Contractor shall notify the COR or inspector within 3 hours of the cause.

8.0 Acceptance of Work

Follow the requirements of FAR Clause 52.246-12 Inspection of Construction.

References to standard test methods of AASHTO, ASTM, GSA, and other recognized standard authorities refer to the methods in effect on the date of solicitation for bids.

Perform all work to the lines, grades, cross-sections, dimensions, and processes or material requirements shown on the plans or specified in the contract.

Incorporate manufactured materials into the work according to the manufacturer’s recommendations or to these specifications, whichever is more strict.

Plan dimensions and contract specification values are the values to be strived for and complied with as the design values from which any deviations are allowed. Perform work and provide material that is uniform in character and reasonably close to the prescribed value or within the specified tolerance range. The purpose of a tolerance range is to accommodate occasional minor variations from the median zone that are unavoidable for practical reasons.

When standard manufactured items are specified (such as fence, wire, plates, rolled shapes, pipe conduits, etc., that are identified by gauge, unit mass, section dimensions, etc.), the identification will be considered to be nominal masses or dimensions. Unless specific contract tolerances are noted, established manufacturing tolerances will be accepted.

The Government may inspect, sample, or test all work at any time before final acceptance of the project. When the Government tests work, copies of test reports are furnished to the Contractor upon request. Government tests may or may not be performed at the work site. If Contractor testing and inspection is verified by the Government, the Contractor’s results may be used by the Government to evaluate work for acceptance. Do not rely on the availability of Government test results for process control.

Acceptable work conforming to the contract will be paid for at the contract unit bid price. However, work may be rejected at any time it is found by any of the methods not to comply with the contract.

Remove, repair, or replace work that does not conform to the contract, or to prevailing industry standards where no specific contract requirements are noted. Removing, repairing, or replacing work; providing temporary traffic control; and any other related work to accomplish conformity will be at no cost to the Government.

(a) Disputing Government test results. If the accuracy of Government test results is disputed, promptly inform the CO. If the dispute is unresolved after reasonable steps are taken to resolve the dispute, further evaluation may be obtained by written request. Include a narrative describing the dispute and a proposed resolution protocol that addresses the following:

1. Sampling method;

2. Number of samples;

3. Sample transport;

4. Test procedures;

5. Testing laboratories;

6. Reporting;

7. Estimated time and costs; and

8. Validation process.

If the evaluation requires additional sampling or testing be performed, mutually agree with the Government on witnessing procedures and on sampling and testing by a third party laboratory. Use a third party laboratory accredited by the AASHTO accreditation program. Provide proof of the laboratory’s accreditation for the test procedures to be used. Do not use the same laboratory that produced the disputed Government test results or that produced the test results used as a basis for the dispute.

The CO will review the proposed resolution protocol and may modify it before final approval and execution.

The Government will use the approved resolution protocol test results to determine the validity of the disputed testing. If the Government test results are validated, the Contractor will be responsible for all costs associated with developing and performing the resolution protocol. If the Government test results are not validated, the Government will be responsible for all costs associated with developing and performing the resolution protocol. If the validity of the Government test results cannot be determined, the Contractor and Government will equally share all costs associated with developing and carrying out the resolution protocol.

(b) Alternatives to removing and replacing non-conforming work. As an alternative to removal and replacement, the Contractor may submit a written request to:

1. Have the work accepted at a reduced price; or

1. Be given permission to perform corrective measures to bring the work into conformity.

The request must contain supporting rationale and documentation. Include references or data justifying the proposal based on an evaluation of test results, effect on service life, value of material or work, quality, aesthetics, and other tangible engineering basis. The CO will determine disposition of the nonconforming work.

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