APPENDIX_A_.docx

USDA Forest Service Supplemental Specifications

Slide Repair For National Forest System Road 650

Nez Perce – Clearwater National Forests Lochsa-Powell Ranger District Idaho County, Idaho

Table of Contents

Preface

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted FP-03 for construction of National Forest System Roads.

101 - Terms, Format, and Definitions 101.00_nat_us_07_25_2005

101.01_nat_us_01_22_2009

101.01 Meaning of Terms

Delete all references to the TAR (Transportation Acquisition Regulations) in the specifications and substitute AGAR (Agriculture Acquisition Regulations).

101.01_nat_us_01_22_2009

101.01 Meaning of Terms

Delete all references to the FAR (Federal Acquisition Regulations) in the specifications.

101.03_nat_us_06_16_2006

101.03 Abbreviations.

Add the following to (a) Acronyms:

AFPA

MSHA

NIST

NESC

WCLIB

American Forest and Paper Association Mine Safety and Health Administration National Institute of Standards and Technology National Electrical Safety Code West Coast Lumber Inspection Bureau

Add the following to (b) SI symbols:

101.04_nat_us_03_29_2007

101.04 Definitions.

Delete the following definitions and substitute the following:

Bid Schedule--The Schedule of Items.

Bridge--No definition.

Contractor--The individual or legal entity contracting with the Government for performance of prescribed work. In a timber sale contract, the contractor is the “purchaser”.

Culvert--No definition.

Right-of-Way--A general term denoting (1) the privilege to pass over land in some particular line (including easement, lease, permit, or license to occupy, use, or traverse public or private lands), or (2) Real property necessary for the project, including roadway, buffer areas, access, and drainage areas.

Add the following:

Adjustment in Contract Price--“Equitable adjustment,” as used in the Federal Acquisition Regulations, or “construction cost adjustment,” as used in the Timber Sale Contract, as applicable.

Change--“Change” means “change order” as used in the Federal Acquisition Regulations, or “design change” as used in the Timber Sale Contract.

Design Quantity--“Design quantity” is a Forest Service method of measurement from the FS-96 Forest Service Specifications for the Construction of Roads and Bridges. Under these FP specifications this term is replaced by the term “Contract Quantities”.

Forest Service--The United States of America, acting through the Forest Service, U.S. Department of Agriculture.

Neat Line--A line defining the proposed or specified limits of an excavation or structure.

Pioneer Road--Temporary construction access built along the route of the project.

Purchaser--The individual, partnership, joint venture, or corporation contracting with the Government under the terms of a Timber Sale Contract and acting independently or through agents, employees, or subcontractors.

Protected Streamcourse--A drainage shown on the plans or timber sale area map that requires designated mitigation measures.

Road Order--An order affecting and controlling traffic on roads under Forest Service jurisdiction. Road Orders are issued by a designated Forest Officer under the authorities of 36 CFR, part 260.

Schedule of Items--A schedule in the contract that contains a listing and description of construction items, quantities, units of measure, unit price, and amount.

Utilization Standards--The minimum size and percent soundness of trees described in the specifications to determine merchantable timber.

Add Figure 101-1—Illustration of road structure terms:

Figure 101-1—Illustration of road structure terms.

101.04_nat_us_11_06_2007

102 - Bid, Award, and Execution of Contract 102.00_nat_us_02_16_2005 102 Bid, Award, and Execution of Contract

Delete Section 102 in its entirety.

103 - Scope of Work 103.00_nat_us_02_16_2005 Deletions

Delete all but subsection 103.01 Intent of Contract.

103.01 Intent of Contract.

The project consists of constructing a retaining wall on National Forest System Road (NFSR) 650 in the Nez Perce-Clearwater National Forest. The retaining wall is made up of geogrid wrapped at the face to form reinforcement inclusions. Construction of the wall is to be done with a removable form that will aid in the construction process. The corrugated metal pipe (CMP) will be removed and salvaged as permitted by the Contracting Officer if the condition is acceptable. Two new CMP drains shall be constructed at the ends of the new wall. An aggregate surfacing course will be placed and compacted upon completion of the wall and drain system.

104 - Control of Work 104.00_nat_us_06_16_2006 Deletions

Delete Sections 104.01, 104.02, and 104.04.

104.06_nat_us_02_17_2005 Add the following subsection:

104.06 Use of Roads by Contractor

The Contractor is authorized to use roads under the jurisdiction of the Forest Service for all activities necessary to complete this contract, subject to the limitations and authorizations designated in the Road Order(s) or described in the contract, when such use will not damage the roads or national forest resources, and when traffic can be accommodated safely.

105 - Control of Material 105.02_nat_us_01_18_2007

105.02 Material Sources.

105.02(a) Government-provided sources.

Add the following:

Comply with the requirements of 30 CFR 56, subparts B and H. Use all suitable material for aggregate regardless of size unless otherwise designated. When required, re-establish vegetation in disturbed areas according to section 625.

Add the following:

All material (e.g., soil, gravel, sand, borrow, aggregate, etc.) transported onto National Forest System land or incorporated into the work will be weed-free. The Contracting Officer may request written documentation of methods used to determine the weed-free status of any and all materials furnished by the contractor. Contractor-provided expertise and methods to establish weed-free status must be appropriate for the weeds of concern in the local area.

105.02_nat_us_02_17_2005 105.02(a) Government Provided Sources.

Government-provided sources for this project are identified as follows:

(1) Government-provided mandatory sources.

Obtain material for use as borrow and in the production of aggregates under Section 704.10 from Raven Pit.

Add the following:

If the Contractor elects to obtain material from Raven Pit the following applies:

(a) Contractor is responsible to have material tested according to AASHTO T-27, T-11, T-89, T-90, and T-99 to ensure conformity with specifications.

(b) In the course of construction if material in Government Provided Source changes, notify the CO promptly and contractor is responsible for testing material to ensure conformity to specifications.

(c) Contractor shall not use more material than is listed in the Schedule of Items without written permission from the Contracting Officer.

105.05_nat_us_05_12_2004

105.05 Use of Material Found in the Work.

Delete 105.05 (a) and (b) and the last sentence of the second paragraph and substitute the following:

Materials produced or processed from Government lands in excess of the quantities required for performance of this contract are the property of the Government. The Government is not obligated to make reimbursement for the cost of producing these materials.

106 - Acceptance of Work 106.01_nat_us_01_17_2013

106.01 Conformity with Contract Requirements.

Delete Subsection 106.01 and substitute the following:

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 stricter.

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. Four methods of determining conformity and accepting work are described in Subsections 106.02 to 106.05 inclusive. The primary method of acceptance is specified in each Section of work. However, work may be rejected at any time it is found by any of the methods not to comply with the contract.

Remove and replace work that does not conform to the contract, or to prevailing industry standards where no specific contract requirements are noted, 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:

(2) Sampling method:

(3) Number of samples;

(4) Sample transport;

(5) Test procedures;

(6) Testing laboratories;

(7) Reporting;

(8) Estimated time and costs; and

(9) 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

(2) 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.

107 - Legal Relations and Responsibility to the Public 107.05_nat_us_05_11_2004

107.05 Responsibility for Damage Claims.

Delete the entire subsection.

107.06_nat_us_06_16_2006

107.06 Contractor’s Responsibility for Work.

Delete the following from the first paragraph.

“except as provided in Subsection 106.07”.

107.08_nat_us_03_29_2005

107.08 Sanitation, Health, and Safety

Delete the entire subsection.

107.10 Environmental Protection.

Add the following:

Design and locate equipment repair shops, stationary refueling sites, or other facilities to minimize the potential and impacts of hazardous material spills on Government land.

Before beginning any work, submit a Hazardous Spill Plan. List actions to be taken in the event of a spill. Incorporate preventive measures to be taken, such as the location of mobile refueling facilities, storage and handling of hazardous materials, and similar information. Immediately notify the CO of all hazardous material spills. Provide a written narrative report form no later than 24 hours after the initial report and include the following:

· Description of the item spilled (including identity, quantity, manifest number, and other identifying information).

· Whether amount spilled is EPA or state reportable, and if so whether it was reported, and to whom.

· Exact time and location of spill including a description of the area involved.

· Containment procedures.

· Summary of any communications the Contractor had with news media, Federal, state and local regulatory agencies and officials, or Forest Service officials.

· Description of clean-up procedures employed or to be employed at the site including final disposition and disposal location of spill residue.

When available, provide copies of all spill related clean up and closure documentation and correspondence from regulatory agencies.

The Contractor is solely responsible for all spills or leaks that occur during the performance of this contract. Clean up spills or leaks to the satisfaction of the CO and in a manner that complies with Federal, state, and local laws and regulations.

108 - Prosecution and Progress 108.00_nat_us_02_16_2005 108 Delete.

Delete Section 108 in its entirety.

109 - Measurement and Payment 109.00_nat_us_02_17_2005 109 Deletions Delete the following entire subsections:

109.06 Pricing of Adjustments.

109.07 Eliminated Work.

109.08 Progress Payments.

109.09 Final Payment.

109.02_nat_us_06_16_2006

109.02 Measurement Terms and Definitions.

(b) Contract quantity.

Add the following:

Contract quantities will be adjusted only when there are errors in the original design of 15% or more.

Change the following:

“(b) Cubic yard” to “(c) Cubic yard”.

Add the following definition:

(p) Thousand Board Feet (Mbf). 1,000 board feet based on nominal widths, thickness, and extreme usable length of each piece of lumber or timber actually incorporated in the job. For glued laminated timber, 1,000 board feet based on actual width, thickness, and length of each piece actually incorporated in the job.

109.03_nat_us_02_17_2005

109.03 Weighing Procedures and Devices.

(c) Project weighing system. Add the following::

Manual scales may be used if approved in writing by the CO and if the method of weighing meets all other contract requirements.

109.03_nat_us_03_29_2005

109.03 Weighing Procedures and Devices.

(c) Project weighing system.

For aggregates weighed for payment, adjust scale weights of material to deduct the daily average moisture content in excess of 2 percentage points over optimum moisture as determined by AASHTO T 99 or the designated compaction method. If moisture determination is necessary, determine the daily average moisture content in accordance with AASHTO T 255, from not less than three representative samples of aggregate taken at random intervals each day that aggregate is being weighed.

151 - Mobilization 151.00_01_us_10_11_2006 Delete Section 151 in its entirety and replace with the following.

Description

151.01 This work consists of moving personnel, equipment, material, and incidentals to the project and performing all work necessary before beginning work at the project site; obtaining of permits, insurance, and bonds. This work also includes washing and treating construction equipment and vehicles necessary for equipment transport to remove seeds, plants, and plant fragments before the equipment is used on Forest Service lands, according to the requirements within.

Work also includes the removal of all logs and windfall from within the roadway.

Work also includes cleaning of all equipment used at the project site. Clean all construction equipment prior to entry on the project site. Remove all dirt, plant parts and material that may carry noxious weed seeds into the area. Only construction equipment inspected by the Forest Service will be allowed to operate within the project area. Treat subsequent move-ins of equipment the same as the initial move-in. Clean truck beds and dump boxes hauling to the project site prior to entering the work area.

Construction Requirements

Wash the sides, tops, and undercarriages of all construction equipment. Remove all seeds, plants, plant fragments, dirt, and debris from the construction equipment. Only equipment inspected by the Forest Service will be allowed to operate within the project area. All subsequent move-ins of equipment to the project area will be treated in the same manner as the initial move-in. This requirement does not apply to cars, pickup trucks, and other vehicles that regularly travel between the construction site and areas off the National Forest.

Equipment will be considered free of soil, seed, and other such debris when a visual inspection does not disclose such material. Disassembly of equipment, components or the need for specialized inspection tools is not required.

Notify the CO in writing at least 72 hours before moving any construction equipment onto the national forest. Notification will include an agreed upon location where the equipment will be available for inspection by the Forest Service. Inspection will be required after every cleaning.

Use methods of cleaning and locations for cleaning approved by the CO.

For work at a commercial washing facility, use an approved facility.

New infestations of noxious weeds of concern to Forest Service and identified by either Contractor or Forest Service, in the Project Area or on the haul route, will be promptly reported to the other party. Contractor and Forest Service will agree on treatment methods to reduce or stop the spread of noxious weeds when new infestations are found. A current list of noxious weeds of concern to Forest Service is available at each Forest Service office.

Measurement 151.02 Clean equipment prior to moving onto this project. The initial cleaning will not be included in the measurement for payment. Payment for cleaning will only be made if subsequent cleanings are ordered by the CO. Measurement shall be on an “each” basis, meaning one complete cleaning of all equipment required for this contract. Subsequent cleanings necessitated by the Contractor’s actions but not directed by the CO will not be included in the measurement for payment.

Measure mobilization according to Subsection 109.02.

Payment 151.03 The accepted quantity, measured as provided in Subsection 109.02, will be paid at the contract price per unit of measurement for the Section 151 pay item shown in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

Progress payments for mobilization lump sum will be paid as follows:

(a) If applicable, bond premiums will be reimbursed according to FAR Clause 52.232-5 Payments Under Fixed-Price Construction Contracts, after receipt of the evidence of payment.

(b) When 5 percent of the original contract amount is earned from other bid items, 50 percent of the mobilization item, or 5 percent of the original contract amount, whichever is less, will be paid.

(c) When 10 percent of the original contract amount is earned from other bid items, 100 percent of the mobilization item, or 10 percent of the original contract amount, whichever is less, will be paid.

(d) Any portion of the mobilization item in excess of 10 percent of the original contract amount will be paid after final acceptance.

Include all costs associated with the initial cleaning of equipment in the unit bid price for Mobilization. Cleaning for subsequent move-ins will not be paid for unless after a suspension ordered by the CO.

152 – Construction Survey and Staking 152.01(a) Personnel.

The Contractor is responsible for providing all staking or re-setting of disturbed stakes. Conduct all construction staking under the direction of a licensed professional engineer or land surveyor who is closely associated and familiar with construction staking.

153 - Contractor Quality Control 153.02_nat_us_02_17_2005

153.02 Contractor Quality Control Plan.

Add the following:

Submit written proposals for approval of alternate AASHTO or State approved test methods. Alternate methods may be allowed based on documented equivalence to the specified method.

153.04_nat_us_10_24_2007

153.04 Records.

Delete all but the first sentence

153.07 Project Submittals.

At a minimum the contractor shall provide project submittals as shown on the below Submittal Log. Submittal requirements are listed in the Standard Specifications, Supplemental Specifications, and Plans.

Submittal Log

155 - Schedules for Construction Contracts 155.00_nat_us_05_11_2004 Delete Section 155 in its entirety.

156 - Public Traffic 156.00_nat_us_04_17_2007 Delete Section 156 in its entirety and replace with the following:

Description 156.01 This work consists of controlling and protecting public traffic adjacent to and within the project.

Material 156.02 Conform to the MUTCD and the following Sections and Subsections:

156.03 General.

Unless otherwise provided for in Table 156-1, keep existing roads open to all traffic during road improvement work, and maintain them in a condition that will adequately accommodate traffic. Delays may not exceed __ minutes at any one time followed by an open period of no less than __ minutes.

Perform no work that interferes or conflicts with traffic or existing access to the roadway surface until a traffic control plan has been approved. Post construction signs and traffic control devices in conformance with MUTCD. All required signs will be in place and approved prior to beginning work on project.

If the Contractor agrees in writing to allow public traffic to use a new road being constructed prior to completion, it will be considered an existing road for traffic control purposes.

156.04 Temporary Traffic Control.

Install and maintain temporary traffic control devices adjacent to and within the project as required by the approved traffic control plan and the MUTCD. Install and maintain traffic control devices as follows:

(a) Furnish and install traffic control devices before the start of construction operations.

(b) All detours outside of clearing limits will be approved in writing by the Contracting Officer as part of the traffic control plan.

(c) Install only those traffic control devices needed for each stage or phase.

(d) Relocate temporary traffic control devices as necessary.

(e) Remove devices that no longer apply to the existing conditions.

(f) Immediately replace any device that is lost, stolen, destroyed, or inoperative.

(g) Keep temporary traffic control devices clean.

(h) Remove all temporary traffic control devices upon contract completion or when approved.

(i) When required, use flaggers certified by the American Traffic Safety Services Association, the National Safety Council, the International Municipal Signal Association, a state agency, or other acceptable organization. Perform the work described under MUTCD Part 6. Use type III, VII, VIII, or IX retroreflective sheeting on flagger paddles. Do not use flags. Flaggers must wear high visibility safety apparel as required by MUTCD 6E.02.

156.05 Temporary Closures.

Road segments may be closed as shown in Table 156-1. The maximum consecutive days of closure shall be followed by a minimum number of consecutive days open to traffic as shown. Maintain traffic control devices during closure period(s). Appropriate barricades and signs will be erected and maintained as shown in the traffic control plan or as otherwise designated.

Prior to closing roads during construction, give written notice to the Contracting Officer at least 14 days in advance.

Table 156-1 Temporary Road Closures

156.06 Acceptance.

Public traffic work will be evaluated under Subsection 106.02.

Measurement and Payment

156.10 See Subsection 109.05.

Delete this subsection in its entirety and replace with the following.

Do not measure Public Traffic for payment. All work associated with this section is considered incidental to other items in the contract.

157 - Soil Erosion Control 157.03_nat_us_02_24_2005

157.03 General

Delete the first two paragraphs and replace with the following:

Submit an Erosion Control Plan detailing permanent and temporary control measures to minimize erosion and sedimentation during and after construction in accordance with the plans and storm water permits. Do not modify the type, size, or location of any control or practice without approval by the CO. Submit the erosion control plan proposal at least 7 days before operations begin to the CO for approval.

Reflect in the Erosion Control Plan special concerns and measures necessary to protect resources and government improvements. Include:

1. The construction activities and sequence of implementation relating to specific erosion control measures.

1. The location and type of permanent controls to be implemented during construction.

1. The location and type of temporary controls to be implemented during construction.

1. Description of the monitoring plan and construction activities and sequence of implementation relating to specific erosion control measures.

Add the following to the third paragraph:

Upon completion of construction at the site, remove all temporary erosion control devices, dewatering materials and equipment from Government property.

201 - Clearing and Grubbing 201.01_nat_us_02_18_2005

201.01 Description

Replace with the following

This work consists of clearing and grubbing within clearing limits and other designated areas.

201.04_nat_us_02_22_2005

201.04 Clearing.

Delete paragraph (c) and replace with the following:

(c) In areas outside the excavation, embankment, and slope rounding limits, cut stumps to within 12 inches or one-third of the stump diameter of the ground, whichever is higher, measured on the side adjacent to the highest ground. For timber sales, stump heights will meet the requirements of the Timber Sale contract.

Delete subsection (d) and replace with the following:

(d) Do not cut vegetation less than 3 feet tall and less than 3 inches in diameter, that is within the clearing limits but beyond the roadway and not in a decking area, and that does not interfere with sight distance along the road.

Add the following:

(e) Trim branches of remaining trees or shrubs to give a clear height of 14 feet above the roadbed unless otherwise indicated. Trim tree limbs as near flush with the trunk as practicable.

(f) Remove brush from log decks. Deck logs so that logs are piled parallel to one another; can be removed by standard log loading equipment; will not damage standing trees; will not interfere with drainage, and will not roll. Keep logs in log decks free of brush and soil.

When marked in advance, remove hazard trees or unstable live trees over 6 inches in diameter measured at 12 inches above the ground that lean toward the road and are tall enough to reach the roadbed.

201.06 Disposal.

Delete the first sentence of this subsection and substitute the following:

Scatter slash outside the brushing limits without damaging residual trees. Slash is defined as any material that has a length greater than 36 inches or a diameter greater than 2 inches at any point. Do not deposit material in streams, streambeds, culvert inlets or outlets, drainage ways, or cattle guards. All cut brush shall be removed from the roadway at the end of each day.

203 - Removal of Structures and Obstructions 203.01_nat_us_02_25_2005

203.01 Description.

Delete and replace with the following:

This work consists of disposing of construction slash and debris, salvaging, removing, and disposing of buildings, fences, structures, pavements, culverts, utilities, curbs, sidewalks, and other obstructions.

203.02_nat_us_02_18_2005

203.02 Material.

Add the following:

Geotextile 714

203.04_nat_us_02_18_2005

203.04 Removing Material.

Replace the fourth and fifth paragraphs with the following:

Where part of an existing culvert is removed, remove the entire culvert upstream from the removal. The remaining downstream culvert may be left in place if no portion of the culvert is within 12 inches of the subgrade, embankment slope, or new culvert or structure; and the culvert ends are sealed with concrete.

Remove structures and obstructions in the roadbed to 12 inches below subgrade elevation. Remove structures and obstructions outside the roadbed to 12 inches below finished ground or to the natural stream bottom.

203.05_0114_us_02_15_2005

203.05 Disposing of Material.

(a) Remove from project.

Delete the last two sentences

(b) Burn.

Delete the last sentence and add the following:

Deposit construction slash so that burning does not damage standing trees. Dispose of unburned material as directed by the CO.

Add the following:

(e) Scattering. Scatter pieces of wood less than 3 inches in diameter and 3 feet in length within the clearing limits. Do not place construction slash in lakes, meadows, streams, or streambeds. Immediately remove construction slash that interferes with drainage structures.

203.05_nat_us_02_18_2005

203.05 Disposing of Material.

Add the following:

(e) Windrowing Construction Slash. Place construction slash outside the roadway in neat, compacted windrows approximately parallel to and along the toeline of embankment slopes. Do not permit the top of the windrows to extend above subgrade. Use construction equipment to matt down all material in a windrow to form a compact and uniform pile. Construct breaks of at least 15 feet at least every 200 feet in a windrow. Do not place windrows against trees. Obtain approval for pioneer roads. A pioneer road may be constructed to provide an area for placement of windrows, provided the excavated material is kept within the clearing limits and does not adversely affect the road construction.

(f) Scattering. Scatter construction slash outside the clearing limits without damaging trees. Limb all logs. Place logs and stumps away from trees, positioned so they will not roll, and are not on top of one another. Limb and scatter other construction slash to reduce slash concentrations.

(g) Chipping or Grinding. Use an approved chipping machine to grind slash and stumps greater than 3 inches in diameter and longer than 3 feet. Deposit chips or ground woody material on embankment slopes or outside the roadway to a loose depth less than 6 inches. Minor amounts of chips or ground woody material may be permitted within the roadway if they are thoroughly mixed with soil and do not form a layer.

(h) Debris Mat. Use tree limbs, tops, cull logs, split stumps, wood chunks, and other debris to form a mat upon which construction equipment is operated. Place stumps upside down and blend stumps into the mat.

(i) Decking Firewood Material. Remove brush from decks. Limb and deck logs that do not meet Utilization Standards according to Subsection 201.04 as directed by the CO. Cut logs to lengths less than 30 feet. Ensure that logs stacks are stable and free of brush and soil.

(j) Removal to designated locations. Remove construction slash to designated locations.

(k) Piling. Pile construction slash in designated areas. Place and construct piles so that if the piles are burned, the burning will not damage remaining trees. Keep piles free of dirt from stumps. Cut un-merchantable logs into lengths of less than 20 feet.

(l) Placing Slash on Embankment Slopes. Place construction slash on completed embankment slopes to reduce soil erosion. Place construction slash as flat as practicable on the completed slope. Do not place slash closer than 2 feet below subgrade. Priority for use of available slash is for: (1) through fills; (2) insides of curves; and (3) ditch relief outlets.

(m) Hydrological Sensitive Placement. Where required use this method in combination with other designated methods to dispose of material to reduce erosion and to aid in re-vegetation:

1. Place windrow segments on contours, wrap in type I geotextile.

2. Place logs as log erosion barriers on contours. Place logs so that 80% of their length is on the ground surface.

3. Scatter slash on bare or disturbed areas within or outside the clearing limits as directed.

4. Scatter chips or ground woody material on bare or disturbed areas within or outside the clearing limits as directed.

Place stumps in swales or on sites to form planting pockets. Place windrow segments on contours, wrap in type I geotextile.

203.08_nat_us_02_24_2005

203.08 Payment

Disposal of construction slash will be compensated under the designated pay item in Section 201.

204 – Excavation and Embankment

204.14 Disposal of Unsuitable or Excess Material.

Delete the text of the first paragraph and substitute the following:

Dispose of unsuitable or excess material legally off of the project.

Contractor may elect to dispose of material at Raven Pit in a designated area with a reduction in bid price.

208 – Structure Excavation and Backfill for Selected Major Structures

208.04 General.

Add the following:

Use all suitable material in the construction of the roadway embankment and for structure backfill. Field drain and dry excessively wet material that is otherwise suitable for embankment before placement. Place and shape unsuitable or excess material at designated sites shown on the drawings or as directed by the CO.

208.10 Backfill.

Delete the first sentence and replace with the following:

Backfill with material meeting the requirements under Subsections 704.10.

208.11 Compacting.

Add the following:

Compact foundation materials to at least 98 percent of the maximum density and backfill materials to at least 95 percent of the maximum density as determined in accordance with AASHTO T-99 or other approved test procedure. Foundation and backfill compaction testing frequency shall be per the requirements set forth in Subsection 255.12.

208.14 Payment.

Payment for backfill is incidental to Section 255 – Mechanically Stabilized Earth Walls as SHOWN IN THE SCHEDULE OF ITEMS.

255 – Mechanically Stabilized Earth Walls Delete section 255 in its entirety and replace with the following:

Description 255.01 This work shall consist of furnishing and installing a geogrid wrap-around wall retaining structure, constructed in accordance with these specifications and in reasonable close conformance with the lines, grades, design, and dimensions SHOWN IN THE DRAWINGS or DESIGNATED ON THE GROUND.

This work shall also include placement of backfill, compaction of backfill, geogrid, and all required road grading in reasonable close conformance with the lines, grades, design, and dimensions SHOWN IN THE DRAWINGS or DESIGNATED ON THE GROUND.

Material 255.02 Conform to the following Section and Subsections Select Granular Backfill 710.04

255.03 Geogrid Acceptance Tests and Requirements

Furnish reinforcement geogrid manufactured as a regular network of integrally-connected longitudinal and transverse polymer tensile elements with a geometry that permits significant mechanical interlock with the backfill. Provide geogrid composed of fibers or ribs that are at least 95 percent by mass polypropylene, polyethylene, or polyester. The geogrid structure must remain dimensionally stable under construction stresses and have a high resistance to damage during construction, to ultraviolet degradation, and to chemical and biological degradation encountered in the soil being reinforced.

Conform to the table listing Reinforcement Geogrid Requirements. Property values represent minimum average roll values (MARV) (i.e., average test results of any roll in a lot sampled for conformance or quality assurance testing must meet or exceed the minimum specified values).

The Nominal long-term strength (Tal) is based on:

Tal = Tult/RF where RF = RFID × RFCR × RFD.

RFID, RFCR, and RFD values must be substantiated by evaluation of independent test results by Highway Innovative Technology Evaluation Center (HITEC), AASHTO National Transportation Product Evaluation Program (NTPEP), or an equivalent third party report. Provide a copy of the report to the CO. Determine RFID, RFCR, and RFD according to the following:

(a) RFID: Determine the reduction factor for installation damage from the results of full scale construction damage tests conducted according to ASTM D5818. Conduct the tests with a soil having the same maximum particle size, D50, and angularity as the soil to be used for construction. Tests using coarser soils (same or larger maximum particle size and D50) may be an acceptable substitution. The CO will make the final determination as to whether the test data based on the substitute soil is acceptable. Interpolation of RFID will not be allowed, the results for the coarser soils will be used. The Contractor may elect to perform a test using project specific fill, placement, and compaction techniques and equipment to determine the RFID. Use a default value of 3.0 if no installation damage testing has been conducted. The minimum value for RFID is 1.1.

(b) RFCR. Determine the creep reduction factor according to one of the following two approaches:

(1) conventional creep testing according to ASTM D5262; or

(2) a combination of stepped isothermal method (SIM) per ASTM D6992 and conventional creep testing. Perform testing and determine creep reduction factors for a 75 year design life according to the procedures in Appendix D of Publication No. FHWA-NHI-10-025, Design and Construction of Mechanically Stabilized Earth Walls and Reinforced Soil Slopes – Volume II. If testing has not been conducted, default values for RFCR are 2.5 for polyester polymer, and 5.0 for polypropylene or polyethylene polymer.

(c) RFD. For polypropylene or polyethylene geosynthetics conforming to the requirements of Table 714-5, a default reduction factor of 1.1 may be used for RFD. For polyester geosynthetics conforming to the requirements listed in Table 714-5, a default reduction factor of 1.15 may be used for RFD if the soil has a pH between 5 and 8; and a reduction factor of 1.3 may be used if the soil pH is between 3 and 5 or between 8 and 9.

The Contractor shall furnish the C.O., in duplicate, a mill certificate of affidavit signed by a legally authorized official from the company manufacturing the geosynthetic. The mill certificate of affidavit shall attest that the geogrid has been tested and meets the chemical, physical, manufacturing, and testing requirements stated in this specification.

Conform to the requirements in the table below. All test data are CERTIFIABLE AVERAGE MINIMUM ROLL VALUES.

Reinforcement Geogrid Requirements

Polypropylene and polyethylene

D4355 Minimum 70% retained strength after 500 hours of exposure

resistance

ASTM D4603

& GRI GG8 (1)

Minimum number average molecular weight (Mn) of 25,000

(CEG) of 30

unit area

ASTM

D5261 Minimum 8 oz/yd2 (270 g/m2)

Percent post consumer recycled material by mass Certification of material used Maximum 0%

(1)Geosynthetic Research Institute.

(2) The specified strength is in the principal direction of reinforcement (that is perpendicular to the wall or slope face).

(3) Based on MARV.

(4) See the nominal long-term strength (Tal) formula above.

255.04 Wall Backfill.

The backfill material shall conform to the requirements of Forest Service Supplemental Specification 704.10.

Material meeting the above specification shall be obtained on site unless otherwise SHOWN ON THE DRAWINGS or as designated by the C.O. Reject material shall be disposed of as directed by the C.O. or AS SPECIFIED IN THE DRAWINGS AND SPECIFICATIONS.

255.05 Wall Face.

The wall face shall be constructed of folded over geogrid with facing mesh. Facing mesh shall be UV resistant, foster and support vegetative growth, 75 year design life, and with fire resistant coating conforming to NFPA 701. Facing mesh shall be equally embedded on top and bottom of each lift. A product that meets this specification is Tencate Miramesh FR.

Geogrid and facing mesh shall be constructed to the grades and elevations SHOWN ON THE DRAWINGS.

255.06 Excavation.

The natural ground adjacent and downslope to the structure shall not be disturbed unless authorized by the C.O. Prior to starting excavation operations in any area, all necessary clearing and grubbing in that area shall have been performed in accordance with SECTION 201. Boulders, logs, and any other objectional material encountered in excavation shall be removed. Contractor shall minimize disturbance to all plants and living trees during construction.

Excavation shall be in accordance with Section 204. Excavated material shall be utilized or disposed of as specified in Forest Service Supplemental Specification 204.14.

255.07 Foundation.

The wall foundation shall be excavated to the lines and grades or elevation SHOWN ON THE DRAWINGS.

When foundation material is undisturbed native material, the top one foot beneath the wall or as SHOWN ON THE DRAWINGS shall be compacted according to Forest Service Supplemental Specification 208.11. The foundation shall be approved in writing by the C.O. before placement of any wall material or backfill.

255.08 Wall Construction.

Wall construction shall begin at the lowest portion of the excavation, and each layer shall be placed approximately parallel to the finished road surface as SHOWN ON THE DRAWINGS.

Geogrid splices transverse to the wall will be allowed provided the minimum overlap is 2 feet. Geogrid splices longitudinal to the wall face will not be allowed.

The embankment fill material shall be placed and spread on the geogrid by methods that will not cause damage to the geogrid. A minimum cover of six inches shall be maintained at all times between the hauling and spreading equipment and geogrid.

Maximum size of rock particles incorporated into the embankment shall be less than 5 inches. Oversize particles may be utilized for rock apron armoring below the drainage pipes.

Compaction shall be as specified in 208.11. Care will be taken to protect the geogrid material from being punctured or ripped during placement operations. Any damaged geogrid shall be repaired or replaced as directed by the C.O. before any additional work will be allowed.

The base of the excavation shall be completed to within ±2 inches of the staked elevations unless directed by the C.O. The external wall dimensions, excluding the base, shall be placed to within ±2 inches of that staked on the ground. Each layer and overlap distance shall be completed to within ±l inch of that SHOWN ON THE DRAWINGS.

Wall batter shall be vertical.

255.09 Procedure.

The construction sequence and procedure for installing the retaining wall shall be as described herein and as approved by the C.O.

255.10 Retaining Wall Installation.

(1) Remove all unsuitable material, including any vegetation, large rocks, sharp objects, or weak soil. Use compacted fill when necessary to fill depressions. Grade the alignment prior to placement of the initial layer of reinforcement. Compact foundation according to Forest Service Supplemental Specification 208.11 except where constructed on bedrock. At a minimum, the C.O. must be on-site at the beginning of subgrade preparation and retaining wall construction to establish acceptable construction sequencing and patterns.

(2) Contractor shall use a temporary wall face falsework in order to achieve both a uniform face and good control of the wall batter. This form should be approximately 10 inches high or as high as the loose height of the fill. Prior to unrolling the geogrid, the form shall be positioned at the face of the wall, over the foundation soil or the underlying compacted layer of backfill.

(3) Unroll the geogrid perpendicular to the wall…