SPS_Rd152.doc

FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS

ROAD 152 SLIDE REPAIR

For

NFS Road 152, MP 0.3

U.S.D.A. FOREST SERVICE

IDAHO PANHANDLE NATIONAL FORESTS, COEUR D’ALENE RIVER RANGER DISTRICT

SHOSHONE COUNTY, IDAHO

March 2010

TABLE OF CONTENTS

3Preface

4101 - Terms, Format, and Definitions

7102 - Bid, Award, and Execution of Contract

8103 - Scope of Work

9104 - Control of Work

11105 - Control of Material

12106 - Acceptance of Work

15107 - Legal Relations and Responsibility to the Public

17108 - Prosecution and Progress

18109 - Measurement and Payment

20151 - Mobilization

21152 - Construction Survey and Staking

26154 - Contractor Sampling and Testing

27155 - Schedules for Construction Contracts

28156 - Public Traffic

30157 - Soil Erosion Control

32201 – Clearing and Grubbing

33203 – Removal of Structures and Obstructions

34204 - Excavation and Embankment

35209 - Structure Excavation and Backfill

36251 - Riprap

37255 – Mechanically Stabilized Earth Walls

39308 – Minor Crushed Aggregate

40601 – Minor Concrete Structures

41622 - Rental Equipment

42704 - Soil

43720 – Structural Wall and Stabilized Embankment Material

Preface

Preface_wo_03_15_2004_m 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.

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 a replacement for 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.

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

103.01 Intent of Contract. Delete this subsection and replace with the following:

The intent of the contract is to repair a portion of road 152 by constructing a mechanically stabilized earth wall and constructing drainage measures. This project is located approximately 16 miles north northeast of Wallace, Idaho. The project is located in the Coeur d’Alene River Ranger District in Section 13, T. 50 N., R. 5 E., at MP 0.3 of National Forest System Road 152.

This project includes constructing a mechanically stabilized earth wall, placing riprap, installing a pipe-arch culvert, removing a pipe culvert, and removing and salvaging a timber crib wall. The precise details of performing the work are not stipulated except as considered essential for the successful completion of the work. Furnish all labor, material, equipment, tools, transportation, and supplies necessary to complete the work according to the contract.

Delete the remaining subsections in this Section.

104 - Control of Work

104.00_nat_us_06_16_2006

Deletions

Delete Sections 104.01, 104.02, and 104.04.

104.03_nat_us_02_22_2005

104.03 Specifications and Drawings.

Add the following:

(c) As-Built-Plans. Furnish one set of as-built plans. The Government will provide one set of contract plans to be used exclusively for recording the as-built details of the project. Use red pencil or red ink to record the information on the as-built plans.

Note all additions or revisions to the location, character, and dimensions of the prescribed work shown on the contract plans. Line out all details shown that are not applicable to the completed work. Check off details shown that were incorporated into the completed work without change.

Retain the plans at the project site and, as work progresses, continually update them to reflect the as-built details. Upon request, make the plans available to the CO to review for compliance with these specifications.

Show the following types of changes on the as-built plans:

(1) Typical section(s)

(a) Revisions in dimensions

(b) Revisions in materials

(2) Plan and profile

· Revisions to the alignment

· Changes in the construction limits

· Revisions in location, type, and grade of road approaches

· Location and type of utilities

· Location, size, and type of underdrains

· Skew of culverts

· Channel changes

· Location of monuments and permanent references

· Elevations for all aerial and underground crossings of utilities

· Location, length, and type of fencing

· Revisions to grades, elevations, and stationing of intersection PIs

· Equations

· Culvert diameter, length, type, and stationing. On culvert extensions, indicate the length of the existing pipe and the length of the extension.

· Location, length, stationing, and type of retaining walls

· Location, length, stationing, and end treatment of guardrail

(3) Bridge

(a) Stationing of bridge ends

(b) Revisions to footing and seal elevations

(c) Pile length, size, type, and tip elevation

(d) Any changes in plan or dimensions including any major changes in reinforcing

(4) Miscellaneous

(a) Revisions to parking areas or turnouts

(b) Final location, type and length of curbs, sidewalks, etc.

Furnish the as-built working plans to the CO before the final inspection. Correct all details found during the final inspection that are not shown on the as-built plans and return to the CO within 5 days.

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.

104.07_nat_us_02_17_2005

Add the following subsection:

104.07 Other Contracts

Coordinate with other operation in the area.

105 - Control of Material

105.02 Material Sources

Add the following before Subsection 105.02(a):

Sources have been designated for this project as follows:

Crushed Aggregate – Commercial Source. There is no designated government source for crushed aggregate on this project. Contractor will obtain crushed aggregate and other like crushed material from a commercial source.

Select Granular Backfill – Commercial Source. There is no designated government source for select granular backfill on this project. Contractor will obtain select granular backfill from a commercial source.

Riprap – Commercial Source. There is no designated government source for riprap on this project. Contractor will obtain riprap and other like rock material from a commercial source.

Material Disposal Site – Contractor Provided. There is no government site designated for removal and storage of material and clearing debris for this project.

Under (b) Contractor-located sources add the following:

Prior to any pit development or use of materials, the pit site shall be approved by the CO that the pit site is free of noxious weed as listed on the "All States Noxious Weeds List”.

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_07_31_2007

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 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. 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:

(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

(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.

106.07_nat_us_05_11_2004

106.07 Delete

Delete subsection 106.07.

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”.

107.09_nat_us_06_16_2006

107.09 Legal Relationship of the Parties.

Delete the entire subsection.

107.10_nat_us_06_16_2006

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

109.02_nat_05_11_2004

109.02 Measurement Terms and Definitions.

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.

109.00_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.

Add the following Subsection:

109.10 Methods of Measurement

One of the following methods of measurement for determining final payment is DESIGNATED IN THE SCHEDULE OF ITEMS for each PAY ITEM:

(a) Designed Quantities (DQ). These quantities denote the final number of units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the contract. Changes in the number of units DESIGNATED IN THE SCHEDULE OF ITEMS may be authorized under any of the following conditions:

(1) Changes in the work authorized by the CO.

(2) A determination by the CO that errors exist in the original design that cause a

PAY ITEM quantity to change by 15 percent or more.

(3) A written request submitted to the CO showing evidence of errors in the original design that cause the quantity of a PAY ITEM to change by 15 percent or more.

The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is in error.

(b) Stake Quantities (SQ). These quantities are determined from staked measurements prior to construction.

(c) Actual Quantities (AQ). These quantities are determined from measurements of completed work.

(d) Vehicle Quantities (VQ). These quantities are measured or weighed in hauling vehicles.

(e) Lump Sum Quantities (LSQ). These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

151 - Mobilization

151.01_0114_us_08_04_2005

Description

151.01 Add the following:

This work consists of 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.

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 48 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 C.O.

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, on 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.

152 - Construction Survey and Staking

152.00_1005_us_05_11_2006

Description

152.01

Delete second sentence.

152.01(c) Material.

Add the following:

Use required stake dimensions and materials. Pre-paint the top 2 inches of all stakes and lath, or mark them with plastic flagging. Use designated colors for paint or flagging. Mark all stakes with a stake pencil that leaves a legible imprint, or with waterproof ink.

Do not use aerosol spray paints.

Use moisture-resistant paper for survey notes. Keep notes in books with covers that will protect the contents and retain the pages in numerical sequence.

Construction Requirements

152.02 General.

Delete first sentence and replace with the following:

Include staking activities in construction schedule.

Delete the last sentence in the first paragraph and replace with the following:

Data relating to horizontal and vertical alignment , theoretical slope stake catch points and other design data will be furnished upon acceptance of final design.

Add the following:

When indicated on the plans, a preliminary survey line has been established on the ground. The project location line is established by offsets from this preliminary line.

Delete second sentence in second paragraph and replace with the following:

Reestablish missing reference, control lines, or stakes as necessary to control subsequent construction staking operations

152.03 Survey and Staking Requirements.

(b) Roadway cross-sections.

Replace the first two sentences with the following:

Take roadway cross-sections normal to centerline. When the centerline curve radius is less than or equal to 200 feet, take cross-sections at a maximum centerline spacing of 25 feet. When the centerline curve radius is greater that 200 feet take cross-sections at a maximum centerline spacing of 50 feet.

Add the following:

Do not take roadway cross sections unless required for volume adjustments according to Subsection 204.16 (a) (1) (a).

c) Slope Stakes & References:

Replace section with the following:

Slope stakes and references. When required, locate slope stakes on designated portions of the road. Locate the slope stake catch points and use them to establish clearing limits and slope stake references.

Mark slope stakes with the station, the amount of cut or fill, the horizontal distance to centerline, and the slope ratios.

Place slope reference stakes at least 10 feet outside the clearing limit and mark with the offset distance to the slope stake. Place sight stakes when required.

Use the designated method to establish the slope stake catchpoint.

· Method I—Computed Method. Use the template information shown in the plans or other Government-provided data to calculate the actual location of the catchpoint. The slope stake “catchpoint distance” provided may be used as a trial location to initiate slope staking. Recatch slope stakes on any section that does not match the staking report within the tolerances established in Table 152-2.

· Method II—Catchpoint Measurement Method. Determine the location of slope stake catchpoints by measuring the catchpoint distances shown in the plans or other Government-provided data.

(d) Clearing and grubbing limits.

Add the following:

Establish clearing limits on each side of the location line by measuring the required horizontal or slope distances shown in the stake notes. Mark the clearing limits with flagging or tags on trees to be left standing, or on lath. Make markings intervisible, and no more than 90 feet apart.

After establishing clearing limits, move the location line stake outside the clearing limits for station identification purposes, and mark it with horizontal distance to location line

(e) Centerline reestablishment.

Replace with the following:

Reestablish centerline from instrument control points. The maximum spacing between centerline points is 25 feet when the centerline curve radius is less than or equal to 200 feet. When the centerline curve radius is greater than 200 feet, the maximum distance between centerline points is 80 feet. Bypass no centerline points falling within any portion of a curve.

Delete Subsection (f) in its entirety

(g) Culverts.

Replace subsection with the following:

Set culvert reference stakes at all culvert locations. Set a culvert reference stake on the centerline of the culvert 10 feet from inlet end or beyond the clearing limit, whichever is greater. Record the following on culvert reference stakes:

(1) Diameter, actual field measured length, and type of culvert.

(2) The vertical and horizontal distance from the reference stake to the invert at the ends of the culvert.

(3) Station of actual point where culvert intersects centerline.

When required, stake headwall for culverts by setting a hub with a guard stake on each side of the culvert on line with the face of the headwall. Perform this work after clearing is completed.

152.03 (j) Borrow and waste areas

Delete the last sentence.

152.03 (l) Miscellaneous Survey and Staking.

Add the following:

(11) Drain Dips

(12) Erosion Control Measures

Replace Table 152-1 with the following two tables:

Table 152-1 Tolerances for reestablishing P-line, traverse, and elevations.

A

(Bridges)

10 second rejection limit

0.02ft/1000ftc

20 second rejection limit

0.02ft/1000ftc

1 minute rejection limit

a. Accuracy of offset measurement.

b. Determine vertical closures at intervals not to exceed 2000 ft as measured along centerline.

c. Use greater value.

Table 152-2 Cross section and slope stake tolerances.

Horizontal and vertical accuracy for slope stake, slope stake references, and clearing limits. In feet or percentage of horizontal distance measured from centerline or reference stake, whichever is greater.

154 - Contractor Sampling and Testing

154.01_nat_us_05_24_2005

154.01 Description

Delete the last sentence of the first paragraph.

155 - Schedules for Construction Contracts

155.00_nat_us_05_11_2004

155 Delete.

Delete Section 155 in its entirety.

156 - Public Traffic

Construction Requirements

156.03 Accommodating Traffic During Work.

Delete the first paragraph and replace with the following:

Accommodate traffic according to the requirements set forth below, MUTCD, and Section 635 of the project specifications. Submit a traffic control plan for acceptance at least 14 days before intended use.

Delete the following from the last paragraph:

…..according to Subsection 106.07(b)

Add the following:

The contractor will be allowed to close National Forest System Road No. 152 to through traffic in the immediate vicinity of the slide area. Give the CO at least 21 days advance written notice prior to any road closure period to allow public notice of the closure by the Forest Service.

As a part of the sign plan for the Road 152 Slide Repair project, the Contractor will be required to furnish and install an advance road closed sign at the intersection of NFSR 2349 and NFSR 1551 and at the intersection of NFSR 1551 and NFSR 152. Omit the words “LOCAL TRAFFIC ONLY” from graphic below.

156.04_nat_us_02_24_2005

156.04 Maintaining Roadways During Work.

(a) Add the following:

Do not construct detours outside of the clearing limits or use alternate route detours without the approval of the CO.

156.08_nat_us_02_24_2005

156.08 Traffic and Safety Supervisor.

Delete this subsection in its entirety.

157 - Soil Erosion Control

Materials

157.02 Add the following:

Provide bales, wattles, logs, rolls, and erosion control mats from a certified noxious weed free source.

Construction Requirements

157.03 General

Delete the second paragraph and add the following:

"This work includes submitting an Erosion Control Plan detailing permanent and temporary erosion control measures. Submit the erosion control plan proposal at least 14 days before operations begin to the Contracting Officer for approval.

The erosion control plan reflects special concerns and measures necessary to protect resources and government improvements. The Erosion Control Plan shall, at a minimum:

1.

Describe the construction activities and sequence of implementation relating to specific erosion control measures.

2. Describe the location and type of permanent controls to be implemented during construction.

3.

Describe the location and type of temporary controls to be implemented during construction.

4.

For work in stream channels with flowing water include a detailed dewatering plan.

5.

Include procedures and temporary control measures to be implemented to minimize sediment delivery during re-watering of any new culvert with streambed simulation material.

6.

For work in stream channels without flowing water describe level of ground and vegetative disturbance and measures to reduce potential sediment delivery.

7. Describe what monitoring will take place.

8.

Describe the measures that will be taken to minimize erosion and sediment delivery from material stockpiles.

9.

Describe methods and measures that will be taken to minimize erosion and sediment delivery to adjacent streams and waterways from the any proposed borrow source.”

Add to the third paragraph:

“Upon completion of construction at the site, all temporary dewatering materials and equipment are to be removed from Government property."

157.04 Controls and Limitations on Work.

Add the following to the second paragraph:

“Temporary erosion control measures will be in place at the end of each day’s operation if greater than 30 percent chance of rainfall is predicted. Earthwork operations may be temporarily suspended by the C.O. if significant rainfall is forecasted.”

157.08 Water Crossings.

Add the following:

“Any site where there is running water through a channel crossing shall be dewatered by rerouting the flow around the site before and during excavation and embankment operations that has the potential for sediment delivery to the live stream.”

Measurement

157.15 Add the following:

“In addition to any temporary or permanent erosion control measures outlined in the Soil Erosion and Pollution Prevention Plan required under this specification, the Contractor will have available on site at all times 5 straw bales and 30 feet of 12 inch diameter straw wattle for the discretionary use of the C.O. Upon completion of the project, bales and wattle that have been incorporated into the work sites will remain in place or be removed as directed by the C.O. Unused bales will be uniformly spread as mulch over seeded areas. Unused straw wattle becomes the property of the Government upon completion of the project. ” Payment

157.16 Add the following:

“Payment for all erosion control measures required under this specification will be considered indirect to other pay items shown on the SCHEDULE OF ITEMS.”

201 – Clearing and Grubbing

201.01_nat_us_02_18_2005

Description

201.01 Replace this subsection with the following:

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

Construction Requirements

201.04_nat_us_02_22_2005

201.04 Clearing. (c)

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.

201.04 Clearing.

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.

201.04_nat_us_02_18_2005

201.04 Clearing.

Add the following:

When marked in advance, remove dead 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.

203 – Removal of Structures and Obstructions Description

203.01 Delete and replace with the following:

This work consists of disposing of clearing slash, salvaging, removing, and disposing of structures, material, culverts, and other obstructions.

Construction Requirements

203.05 Disposing of Material.

(a) Remove from project Add the following:

All materials designated for removal become the property of the Contractor and are to be disposed of by removing off of Forest Service Lands in accordance with all local, state and federal requirements.

(b) Burn. Delete this subsection

(c) Bury. Delete this subsection

203.05 Disposing of Material.

Add the following:

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

(f) 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.

204 - Excavation and Embankment

Description

204.01

Delete the first paragraph and replace it with the following:

This work consists of excavating material, and constructing embankments. This includes furnishing, hauling, stockpiling, placing, disposing, sloping, shaping, compacting, and finishing earthen and rocky material.

Construction Requirements

204.11 Compaction.

Delete this subsection and substitute the following:

Determine the optimum moisture content and maximum density according to AASHTO T 99, method C. Adjust the moisture content to a level suitable for compaction.

Compact materials placed in all layers to at least 95 percent of the maximum density. The Contractor will be responsible to determine the in place density and moisture content according to AASHTO T 310 or other approved test procedures, in accordance with Table 204-1.

Do not apply density requirements as measured by AASHTO T 310 to material that is incapable of being tested or compacted to maximum values determined by AASHTO T 99. For these materials, fill the voids around the rock in each layer with earth or other fine material. Compact each layer, full width, until there is no visible evidence of further consolidation.

204.13 Sloping, Shaping, and Finishing.

Delete section (d) and add the following:

(d) Finishing. Finish the roadbed to be smooth and uniform, and shaped to conform to the typical sections. Remove unsuitable material from the roadbed and replace it with suitable material. Remove all material larger than 6 inches from the top 6 inches of the roadbed and replace with suitable material.

Ensure that the embankment material is visibly moist during shaping and dressing. Bring low sections, holes, cracks, or depressions to grade with suitable material. Maintain proper ditch drainage.

209 - Structure Excavation and Backfill Construction Requirements

209.04 General.

Add the following:

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

251 - Riprap

251.01_10_us_04_05_2006

Description

Delete the first sentence and add the following:

251.01 This work consists of furnishing, hauling and placing of riprap for culvert inlet protection and drainage structures.

251.03_nat_us_06_18_2007

Construction Requirements

251.03 General.

Add the following:

Place riprap under or adjacent to structures before placing prefabricated superstructure units or constructing superstructure falsework unless otherwise approved by the CO.

251.08 Measurement.

Add the following:

Payment for excavation and embankment required for placement of riprap is indirectly included in the pay item for riprap.

255 – Mechanically Stabilized Earth Walls Material

255.02 Add the following:

Underdrain System

Geotextile type II

714.01

Geocomposite Drains

714.02

Geogrid

720.04

Construction Requirements

255.03 General. Delete this subsection and replace with the following:

Survey according to Section 152, and verify the limits of the wall installation. Prepare and submit installation drawings according to Subsection 104.03.

Perform structure excavation work according to Section 209. Grade the foundation for a width equal to the length of reinforcing elements plus 6 inches. Where the wall is set on a rocky foundation, place 6 inches of select granular backfill under welded wire frames and geogrid reinforcement. Minimum base reinforcement lengths for walls founded on bedrock are as shown on the plans.

Bedrock may be encountered through some wall sections or some segment(s) of wall section(s). Blasting will not be allowed for bedrock excavation without prior approval from the CO.

Install underdrains and sheet drains according to Section 605.

255.04 Wall Erection. Add the following:

(d) Geogrid walls. Place and align welded wire forms to the wall face. Lay geogrid against welded wire form, allowing adequate length for the overlap. Secure support struts as shown on the plans. Align the wall face to within 1 inch along the batter of the face and 1 inch horizontally when measured with a 5-foot straightedge.

Lay geogrid at the proper elevation and orientation as shown on the plans. Pretension the geogrid to remove buckling by temporarily securing in-place with pins, staples, sand bags, or backfill as required by fill properties, fill placement procedures, weather conditions, or as directed by the CO.

255.05 Backfilling. Delete the text of this Subsection and replace with the following:

Backfill and compact the stabilized volume with select granular backfill. Start backfill placement at the wall face and work towards the back. Place backfill in 6 inch lifts. Compact each layer according to Subsection 204.11. Compact within 3 feet of the wall face with 3 passes of a lightweight mechanical tamper, roller, or vibratory system.

Where geogrid is used, place, spread, and compact backfill in such a manner that it minimizes the development of wrinkles in or movement of the geogrid. A minimum of 6 inch fill thickness is required prior to operating equimpment over geogrid. Keep turning of equipement to a minimum to prevent displacing the fill and damaging the geogrid.

Replace all wall materials damaged by backfill pacement. Correct all misaligned or distorted wall elements caused by the placement of backfill.

255.06 Acceptance. Add the following:

Geogrid, welded wire framing, and related hardware will be evaluated under Subsection 106.03.

Geogrid wall construction will be evaluated under Subsection 106.04.

Construction Requirements

255.07 Ammend as follows:

Delete the second paragraph Add the following:

Measure geogrid walls by the square yard of vertical projection of the wall face.

Do not measure geogrid, welded wire framing, and related hardware for payment.

Do not measure bedding, collector pipes, outlet pipes, select granular backfill, or geotextile for payment.

Do not measure structural excavation for payment.

308 – Minor Crushed Aggregate Construction Requirements

308.05 Compacting and Finishing Crushed Aggregate.

(a) Roadway aggregate. Delete this subsection and replace with the following:

Method 1 - Adjust the moisture content of the material to a level suitable for compaction. Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases. Make at least three complete passes.

Blade the surface of each layer during the compaction operations to remove irregularities and produce a smooth, even surface.

Ensure that the thickness and width of the compacted aggregate conform to the dimensions SHOWN ON THE DRAWINGS, and that measurements on the compacted aggregate meet the following criteria:

(a) The maximum variation from the compacted specified thickness is ½ inch.

(b) The compacted thickness is not consistently above or below the specified thickness and the average thickness of 4 random measurements for any ½ mile of road segment is within + ¼ inch of the specified thickness.

(c) The maximum variation from the specified width will not exceed +12 inches at any point.

(d) The compacted width is not consistently above the specified width and the average of any four random measurements along any ½ mile of road segment is within +4 inches of the specified width.

601 – Minor Concrete Structures Material

601.03 Concrete Composition.

Delete the first paragraph and replace with the following:

Conform to Table 601-1. Before batching concrete, submit the proposed concrete proportions for approval. As a minimum, submit the following:

Delete Table 601-1 and replace with the following:

Table 601-1

Composition of Minor Structure Concrete

Air content

4 % minimum

passing the 1½-inch sieve

622 - Rental Equipment

Construction Requirements

622.02 Rental Equipment

Delete the first two sentences of the first paragraph and add the following:

Hydraulic Excavator. Provide a track mounted hydraulic excavator in acceptable operating condition as determined by the CO. Bucket must be equipped with an hydraulic "thumb". It is anticipated that an excavator of a size capable of performing the excavation needs for the project, i.e. structure excavation, riprap construction, etc., will be of an adequate size to be acceptable for any work that the Contractor may be directed to perform under this section. Equipment used shall be free of any leaks.

Large Dump Truck. Provide a large dump truck with a minimum capacity of 12 cubic yards in acceptable operating condition as determined by the CO. Equipment used shall be free of any leaks.

Measurement

622.04 Add the following:

The Government reserves the right to reduce or eliminate entirely the work under this item with no adjustment in contract unit price.

704 - Soil

704.04 Structural Backfill. Change the specified maximum particle size to the following:

(a) Maximum particle size 6 inches

704.10 Select Granular Backfill. Add the following:

The wall design is based on the use of this material for construction of the wall. No substitutions for this material may be used on the project without prior written consent from the CO.

720 – Structural Wall and Stabilized Embankment Material

720.01 Mechanically-Stabilized Earth Wall Material. Add the following:

(k) Welded wire form. Use a Wn.7 x W4.7, 4 inch galvanized welded wire fabric conforming to AASHTO M 55 and fy > 72,500 psi. Make a weld at each connection that has minimum shear strength of 35,000 psi.

(l) Support struts. Fabricate the support struts from cold drawn steel wire conforming to AASHTO M 32. Galvanize the struts according to AASHTO M 232.

720.04 Geogrid. (Added Subsection.)

Manufacture the geogrid as a regular network of integrally-connected longitudinal and transverse polymer tensile elements with a geometry that permits significant mechanical interlock with the backfill. The geogrid structure shall remain dimensionally stable under construction stresses and have a high resistance to damage during construction, to ultraviolet degradation, and to all form of chemical and geological degradation encountered in the soil being reinforced.

(a) Physical Requirements. At MSE locations, provide a geogrid with a minimum tensile strength, Ta, of 500 lb/ft.

Where:

Ta = Tult

RFx 1.5

And:

RF = FSid x FScr x FSd Determine Tult (Ultimate Tensile Strength) according to ASTM D 4595 (or Geosynthetic Research Institute tests (GR1 and GR2) and ASTM D 4759. Determine FSID, FSCR, and FSD according to the following:

FSID

Determine the Partial Factor of Safety for Installation Damage from the results of full scale construction damage tests conducted according to ASTM D 5818. If possible, conduct the tests using project-specific backfill and construction placement techniques. As an alternate, conduct the tests with a proxy soil with a D50 of 1.2 inch. Use a default value of 2.05 if no installation damage testing has been conducted. The minimum value for FSID is 1.1.

FSCR

Determine the Partial Factor of Safety for Creep Deformation according to ASTM D 5262. Collect test data for a minimum duration of 10,000 hours for both standard and elevated temperatures. Extrapolate the test results of a 75-year design life as provided in Appendix B of FHWA Publication No. FHWA-NHI-00-043, Mechanically Stabilized Earth Walls and Reinforced Soil Slopes – Design and Construction Guidelines. If testing has not been conducted, default values for FSCR are:

Polymer Type

FSCR

Polyester

2.5

Polypropylene

5.0

Polyethylene

5.0

FSD

The Durability Reduction Factor is dependent on the susceptibility of the geogrid to attach from chemicals, thermal oxidation, hydrolysis, stress cracking, and microorganisms. Manufacturer recommended reduction factors may be used for FSD. When this factor is not obtained, the minimum reduction factor for the combined effects of chemical and biological degradation is:

Polymer Type

FSD

Polyester

2.0

Polypropylene

1.1

Polyethylene

1.1

Identify, store, and handle geogrid according to ASTM D 4873. Limit geogrid exposure to ultraviolet radiation to less than 10 days.

(b) Evaluation procedures. Geogrid will be evaluated under Subsection 106.03. furnish a production certification that the geogrid supplied meets the respective index criteria set forth in these specifications. State on the certification the name of the manufacturer, product name, style number, chemical composition of the filaments, ribs, or yarns, and other information to fully describe the geogrid. In case of dispute over the validity of values, the CO can require the contractor to supply test data from an agency-approved laboratory to support the certified values submitted.

When samples are required, remove a 3.3-foot long, full-width sample from beyond the first outer wrap of the roll. Label the sample with the lot and batch number, date of sampling, project number, item number, manufacturer, and product name.