Specifications.pdf

Standard Specifications for Construction of Roads and Bridges

On Federal Highway Projects

Spec. No. Title Latest Rev. Date No. Pages.

FSSS 101-109 General Requirements 1/2009 14

101-109 General Requirements FP-03 2003

FSSS 151 Mobilization 8/2005 1

151 Mobilization FP-03 2003

FSSS 152 Construction Surveying and Staking 8/2005 5

152 Construction Surveying and Staking FP-03 2003

FSSS 153 Contractor Quality Control 10/2007 2

153 Contractor Quality Control FP-03 2003

FSSS 203 Removal of Structures and Obstructions 2/2005 1

203 Removal of Structures and Obstructions FP-03 2003

FSSS 204 Excavation and Embankment 3/2005 2

204 Excavation and Embankment FP-03 2003

FSSS 209 Structure Excavation and Backfill 10/2007 2

209 Structure Excavation and Backfill FP-03 2003

FSSS 251 Riprap 10/2006 1

251 Riprap FP-03 2003

FSSS 301 Untreated Aggregate Courses 3/2005 2

301 Untreated Aggregate Courses FP-03 2003

FSSS 601 Minor Concrete 2/2007 7

South Mineral Culvert Replacement

San Juan National Forest Specification List South Mineral Culvert Replacement

FSSS 601 Minor Concrete 2/2007 7

601 Minor Concrete FP-03 2003

FSSS 602 Culverts and Drains 9/2005 1

602 Culverts and Drains FP-03 2003

FSSS 625 Turf Establishment 7/2007 2

625 Turf Establishment FP-03 2003

FSSS 635 Temporary Traffic Control 5/2004 1

635 Temporary Traffic Control FP-03 2003

San Juan National Forest Specification List South Mineral Culvert Replacement

Standard Specifications for Construction of Roads and Bridges

On Federal Highway Projects

San Juan National Forest Specification List South Mineral Culvert ReplacementSan Juan National Forest Specification List South Mineral Culvert Replacement

FSSS – South Mineral Culvert Replacement

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Table of Contents

Table of Contents

Preface

101 - Terms, Format, and Definitions

101.01 Meaning of Terms

101.03 Abbreviations

101.04 Definitions

102 - Bid, Award, and Execution of Contract

102 Bid, Award, and Execution of Contract

103 - Scope of Work

Deletions

104 - Control of Work

Deletions

104.06 Use of Roads by Contractor

105 - Control of Material

105.02 Material Sources

105.02(a) Government-provided sources

105.05 Use of Material Found in the Work

106 - Acceptance of Work

106.05 Delete

106.07 Delete

107 - Legal Relations and Responsibility to the Public

107.05 Responsibility for Damage Claims

107.06 Contractor’s Responsibility for Work

107.09 Legal Relationship of the Parties

107.10 Environmental Protection

108 - Prosecution and Progress

108 Delete

109 - Measurement and Payment

109 Deletions

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109.02 Measurement Terms and Definitions

151 - Mobilization

152 - Construction Survey and Staking

152.02 General

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

Table 152-2 Cross section and slope stake tolerances

153 - Contractor Quality Control

153.02 Contractor Quality Control Plan

153.04 Records

155 - Schedules for Construction Contracts

155 Delete

203 - Removal of Structures and Obstructions

203.01 Description

203.04 Removing Material

204 - Excavation and Embankment

204.11 Compaction

204.13 Sloping, Shaping, and Finishing

Table 204-2 Construction tolerances

209 - Structure Excavation and Backfill

209.10 Backfill

209.11 Compacting

Table 209-1 Sampling and Testing Requirements

251 - Riprap

251.03 General

301 - Untreated Aggregate Courses

301 Title Change

301.01 Work

301.02 Material

301.03 General

601 - Minor Concrete

601.01

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Table 601-2. Sampling and Testing Requirements

602 - Culverts and Drains

602.03 General

625 - Turf Establishment

625.03 General

625.04 Preparing Seedbed

625.07 Seeding

625.09 Protecting and Caring for Seeded Areas

625.11 Measurement

635 - Temporary Traffic Control

635.03 General

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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, Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, http://flh.fhwa.dot.gov/resources/pse/specs/, for construction of National Forest System Roads.

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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:

mp Milepost ppm Part Per Million

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.

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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:

Actual Quantity—These quantities are determined from measurements of completed work.

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--“Contract quantities” that are identified in the bid schedule as “Design quantities” (DQ) that will be adjusted only when there are errors in the original design of 15% or more.

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.

Vehicle Quantity—These quantities are measured or weighed in hauling vehicles.

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

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Figure 101-1—Illustration of road structure terms.

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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.

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103 - Scope of Work

103.00_nat_us_02_16_2005

Deletions

Delete all but subsection 103.01 Intent of Contract.

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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.

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105 - Control of Material

105.02_nat_us_01_18_2007

105.02 Material Sources.

105.02(a) Government-provided sources.

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.

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.

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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.

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(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:

Sampling method;

1. Number of samples;

2. Sample transport;

3. Test procedures;

4. Testing laboratories;

5. Reporting;

6. Estimated time and costs; and

7. 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

14 | P a g e material or work, quality, aesthetics, and other tangible engineering basis. The CO will determine disposition of the nonconforming work.

106.05_0213_us_02_11_2005

106.05 Delete

Delete subsection 106.05.

106.07_nat_us_05_11_2004

106.07 Delete

Delete subsection 106.07.

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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.

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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.

Report all spills to:

Durango Dispatch (970) 385-1324

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108 - Prosecution and Progress

108.00_nat_us_02_16_2005

108 Delete.

Delete Section 108 in its entirety.

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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 that are identified in the bid schedule as “design quantities” (DQ) will be adjusted only when there are errors in the original design of 15% or more. Contract items that are identified in the bid schedule as “actual quantities” (AQ) will be adjusted for authorized changes that affect the quantity or for errors made in computing this quantity.

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.

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151 - Mobilization

151.03_nat_us_08_05_2005

151.01 Description

Add the following:

Noxious Weed Control requirements:

Clean all construction equipment prior to entry onto the project area. Remove all dirt and plant parts and material that could carry noxious weed seeds onto the project. Only construction equipment so cleaned and inspected by the Forest Service will be allowed to operate within the project area. Treat all subsequent move-ins of construction equipment in the same manner as initial move-ins. “Construction equipment” does not include personal vehicles, paving equipment or support equipment that remains on the main travel route.

Prior to the initial move-in, the contractor shall make all construction equipment avaialbel for inspection by the Forest Service at an agreed upon location. Provide the Forest Service at least 24 hours advance notification when equipment is ready for inspection.

151.03 Payment

Delete the entire subsection and add the following:

Include all costs associated with the cleaning of equipment in the unit bid price for mobilization.

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152 - Construction Survey and Staking

152.00_nat_us_08_05_2005

Description

152.01(c) Material.

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 the first two sentences.

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.

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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 80 feet.

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.

Prior to clearing and grubbing operations, move the slope stake outside the clearing limit to the slope reference stake. After clearing and grubbing and before excavation, reset the slope stakes in their original position.

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.

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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.

(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 each 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 (l) Miscellaneous Survey and Staking.

(11) Cattleguards

(12) Drain Dips

(13) Erosion Control Measures

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Replace Table 152-1 with the following two tables:

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

Precision Class

Minimum Position Closure Angular Accuracy (±)

L-Line Tangent Control Pointsa

Vertical Closureb

A

(Bridges) 1/10,000

2 sets, direct/reverse

10 second rejection limit

N/A

0.02 ft or

0.02ft/1000ftc

B 1/5,000

2 sets, direct/reverse

20 second rejection limit

0.1 ft

0.02 ft or

0.02ft/1000ftc

C 1/1,000 1 set, direct/reverse

1 minute rejection limit

0.2 ft 0.5ft/1000ftc

D 1/300 Foresight and backsight;

15 minute rejection limitc

0.4 ft 1.0ft/1000ftc

E 1/100 Foresight and backsight;

30 minute rejection limitc

0.8 ft 1.0ft/1000ftc

a. Accuracy of offset measurement.

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

c. Use greater value.

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Table 152-2 Cross section and slope stake tolerances.

Item Tolerances

A B C D E

Allowable deviation of cross-section line projection from a true perpendicular to tangents, a true bisector of angle points, or a true radius of curves

(±)2o (±)3o (±)3o (±)5o (±)5o

Take cross-sections topography measurements so that variations in ground from a straight line connecting the cross-section points will not exceed

0.5 ft 1.0 ft 2.0 ft 2.0 ft 3.0 ft

Horizontal and vertical accuracy for cross-sections, in feet or percentage of horizontal distance measured from traverse line, whichever is greater.

0.1 ft or 0.4%

0.15 ft or 0.6%

0.2 ft or 1.0%

0.2 ft or 1.0%

0.3 ft or 1.0%

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.

Slope reference stakes and slope stakes. 0.1 ft or 0.4%

0.15 ft or 0.6%

0.2 ft or 1.0%

0.2 ft or 1.0%

0.3 ft or 1.0%

Clearing limits 1.0 ft 1.0 ft 1.0 ft 1.5 ft 2.5 ft

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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.

153.03 Testing.

Delete this subsection in entirety and substitute the following:

(a) Sampling. Sample materials to be tested according to the Sampling and Testing requirement tables included at the end of each section. The sampling schedules and times will be provided by and generated by the contractor using a random number system. In addition, sample any material that appears defective or inconsistent with similar material being produced unless such material is voluntarily removed and replaced or corrected.

Sample and split samples according to AASHTO or other acceptable procedures. Allow the Forest Service the opportunity to witness all sampling. Immediately perform companion splits on all samples required. Store the Government’s portion of the sample or split sample in an acceptable container suitable for shipment and make available upon request for independent assurance sampling. Store all samples not requested until the end of the job and the CO will notify the contractor in writing as to their disposition.

Label all samples with the following information:

(1) Project number

(2) Source of material

(3) Pay item number

(4) Sample number

(5) Date sampled

(6) Time sampled

(7) Location sample taken

(8) Name of person sampling

(9) Name of person witnessing sampling

(10) Type of test required on sample

(b) Testing. Perform testing according to the accepted quality control plan. Keep laboratory facilities clean and maintain all equipment in proper working condition. Allow unrestricted access for inspection and review of the facility.

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153.04_nat_us_10_24_2007

153.04 Records.

Delete all but the first sentence

153.06 Measurement and Payment.

Delete in entirety and substitute the following:

Do not measure Contractor Quality Control for payment. Payment for this work shall be an indirect payment to other items.

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155 - Schedules for Construction Contracts

155.00_nat_us_05_11_2004

155 Delete.

Delete Section 155 in its entirety.

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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.

203.04_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.

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204 - Excavation and Embankment

204.11_nat_us_04_11_2005

204.11 Compaction.

Delete the first paragraph and replace it with the following:

For compaction according to method (a), (b), or (c), use AASHTO T 27 to determine the amount of material retained on a Number. 4 sieve. For compaction methods (d) or (e) no sieve test is required.

Add the following compaction methods:

(d) Layer Placement Method (Hauling and Spreading Equipment). Place material by end dumping to the minimum depth needed for operation of spreading equipment. Level and smooth each embankment layer before placing the next layers. Operate hauling and spreading equipment uniformly over the full width of each layer. Construct a solid embankment with adequate compaction by working smaller rock and fines in with the larger rocks to fill the voids, and by operating hauling and spreading equipment uniformly over the full width of each layer as the embankment is constructed.

(e) Layer Placement (Roller Compaction) Method. Place material by end dumping to the minimum depth needed for operation of spreading equipment. Adjust the moisture content of the material to obtain a mass that will not visibly deflect under the load of the hauling and spreading equipment. Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases or, in when a sheepsfoot roller is used, the roller “walks out” of the layer. Make at least three complete passes.

204.13_0213_us_03_25_2005

204.13 Sloping, Shaping, and Finishing.

Delete section (d) and add the following:

(d) Finishing.

For surfaced and unsurfaced roads, use one of the following methods to finish the roadbed:

(1) Method A. Remove all material larger than 6 inches from the top 6 inches of the roadbed and replace with suitable material.

(2) Method B. Use a vibratory grid roller or approved equal with a minimum weight of 10 tons. Roll at least 5 full-width passes or until visible displacement ceases.

(3) Method C. For roads designated as Construction Tolerance Class K, L, or M, finish the roadbed by spreading the excavation. Eliminate rock berms.

Add Table 204-2—Construction Tolerances:

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Table 204-2 Construction tolerances.

Tolerance Class(a)

A B C D E F G H I J K L M Roadbed width (ft) +0.5 +0.5 +1.0 +1.0 +1.0 +1.0 +1.5 +1.0 +2.0 +2.0 +2.0 +2.0 +2.0

Subgrade elevation

(ft)

+0.1 +0.2 +0.2 +0.5 +0.5 +1.0 +1.0 +1.5 +2.0 +3.0 +2.0 +3.0 (c)

Centerline alignment (ft)

+0.2 +0.2 +0.5 +0.5 +1.0 +1.0 `+1.5 +1.5 +2.0 +3.0 +3.0 +5.0 (c)

Slopes, excavation, and embankment (% slope(b)

+3 +5 +5 +5 +5 +5 +10 +10 +10 +10 +20 +20 +20

a. Maximum allowable deviation from construction stakes and drawings.

b. Maximum allowable deviation from staked slope measured from slope stakes or hinge points.

c. Unless otherwise shown the centerline alignment and subgrade elevation, as built, have no horizontal curves with a radius of less than 80 feet, and no vertical curves with a curve length of less than 80 feet when the algebraic difference in the grade change is less than 10 percent, or a curve length of less than 100 feet when the algebraic difference of the grade change is greater than or equal to 10 percent. The centerline grade is not to exceed 20 percent in 100 feet of length.

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209 - Structure Excavation and Backfill

209.10_nat_us_10_23_2007

209.10 Backfill.

(a) General.

Add the following:

Replace any pipe that is distorted by more than 5 percent of nominal dimensions, or that is ruptured or broken.

Do not place or backfill pipe that meets any of the following conditions until the excavation and foundation have been approved in writing by the CO:

Embankment height greater than 6 feet at subgrade centerline.

Installation in a protected streamcourse.

Round pipe with a diameter of 48 inches or greater.

Pipe arches with a span of 50 inches or greater.

Any box culvert of structure other than pipe culverts.

(b) Pipe culverts.

(1) Pipe culverts with compacted backfill.

Add the following:

Excavate an area on each side of the pipe as needed to effectively achieve compaction requirements. Backfill without damaging or displacing the pipe.

Complete backfilling of the trench with suitable material.

209.11_nat_us_02_24_2005

209.11 Compacting.

Delete the subsection and add the following:

Compact backfill using designated compaction method A, B, or C:

Method A. Ensure that backfill density exceeds the density of the surrounding embankment.

Method B. Adjust the moisture content of the backfill material to a moisture content suitable for compaction. Compact each layer using appropriate compaction equipment until visual displacement ceases. For compaction under sections 252, 254, 255, 257, 258 and 262 compact with a vibratory steel wheeled roller with a mass of at least 8 tons.

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Method C. Determine optimum moisture content and maximum density according to AASHTO T 99 method C. Adjust the moisture content of the backfill material to a moisture content suitable for compaction. Compact material placed in all layers to at least 95 percent of the maximum density. Determine the in place density and moisture content according to AASHTO T 310 or other approved test procedures.

Table 209-1 Sampling and Testing Requirements

(2) Compaction methods (A) and (B) do not require AASHTO T-99 or T-310 test methods for foundation fill.

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251 - Riprap

251.03_nat_us_08_05_2009

251.03 General.

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.

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

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301 - Untreated Aggregate Courses

301.00_nat_us_03_03_2005

301 Title Change.

Change the title to: Section 301 Aggregate Courses

301.01_nat_us_03_03_2005

301.01 Work.

Add the following:

Work includes producing aggregate by pit-run, grid rolling, screening, or crushing methods, or placing Government-furnished aggregate. Work may include additive mineral filler, or binder.

301.02_nat_us_05_16_2005

301.02 Material.

Add the following:

Calcium Chloride Flake 725.02

Lignon Sulfonate 725.20

Magnesium Chloride Brine or Calcium Chloride Liquid 725.02

301.03_nat_us_09_14_2005

301.03 General.

Add the following:

Written approval of the roadbed is required before placing aggregate.

For pit run or grid-rolled material, furnish material smaller than the maximum size. No gradation other than maximum size will be required for pit-run or grid-rolled material. For grid rolling, use all suitable material that can be reduced to maximum size. After processing on the road, remove all oversize material from the road and dispose of it as directed by the CO.

Provide additives or binder, if required, at the proportions specified.

Develop and use Government furnished sources according to Section 105.

If the aggregate is produced and stockpiled before placement, handle and stockpiled according to Section 320. Establish stockpile sites at locations approved. Clear and grub stockpile sites according to Section 201.

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301.10_nat_us_03_03_2005

301.10 Payment

Delete the following:

adjusted according to Subsection 106.05

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601 - Minor Concrete

601.00_nat_us_02_27_2007

Delete the entire specification and replace it with the following:

Description

601.01 This work consists of constructing minor concrete structures.

Material

601.02 Conform to the following Subsections:

Air-entraining admixtures 711.02

Chemical admixtures 711.03

Coarse aggregate 703.02

Concrete coloring agents 711.05

Curing material 711.01

Fine aggregate 703.01

Fly ash 725.04

Hydraulic Cement 701.01

Joint fillers 702.01

Precast concrete curbing 725.06

Precast concrete units 725.11

Reinforcing steel 709.01

Structural steel 717.01

Water 725.01

601.03 Concrete Composition. Use the designated concrete composition:

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(a) Method A. Submit a mix design showing the proposed masses of aggregate, water, and cement per cubic yard of concrete a minimum of 7 days prior to beginning placement. Proportion the cement, aggregate, and water to obtain concrete with good workability.

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Composition of Minor Structure Concrete

Property Specification Test Method

Slump 4 in maximum AASHTO T 119

Air content 5 to 7 percent AASHTO T 152 or T 196

28-day compressive strength 3000 psi AASHTO T 23 and T 22

(b) Method B. Submit the following information a minimum of 7 days prior to beginning placement:

(1) Type, grading, and sources of aggregate.

(2) Type and source of cement, blended cement, or fly ash.

(3) Saturated surface dry weights of the fine and coarse aggregate in pounds per cubic yard of concrete.

(4) Weight of mixing water in pounds per cubic yard of concrete.

(5) Weight of cement in pounds per cubic yard of concrete.

(6) Admixture type, quantity, and certification by manufacturer.

(7) Air content.

(8) Slump.

(9) 28-day compressive strength.

Furnish concrete containing not less than 680 pound of cement per cubic yard. Ensure that slump is 4 inches or less, as determined by AASHTO T 119.

(c) Method C. Make the concrete using a dry, preproportioned, blended, and bagged mix meeting the requirements of ASTM C 387 and mixed at the jobsite according to the manufacturer’s recommendations.

(d) Fly Ash- or Pozzolan-Modified Concrete. Fly ash may be substituted for cement at the rate of 20 ounces of fly ash per 16 ounces of Portland cement. After substitution, reduce the design aggregate volumes by an amount equal to the net increase in volume of the combined cement and fly ash. Replace no less than 10 percent and no more than 20 percent of the weight of Portland cement required with fly ash at the above rate. For purposes of controlling the maximum water/cement ratio of 0.49, make the water/cement ratio for fly-ash-modified concrete the ratio of the weight of water to the combined weights of Portland cement and 60 percent of the weight of the fly ash.

Extend the standard 28-day curing period for compressive-strength tests for fly-ash modified concrete by 1 day (rounded to the nearest whole day) for each 1.5 percent of Portland cement replaced with fly ash at the selected rate. (Example: If the maximum of 20 percent cement is replaced, the curing period for cylinders is 41 days.)

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601.04 General. Perform excavation and backfill work according to Section 209. When concrete is cracked, spalling, or scaling, remove concrete to the nearest joint.

Design and construct forms that are free of bulge and warp and allow for removal without injuring the concrete. When concrete contains a retarding admixture, fly ash, or other pozzolan replacement for cement, design the forms for a lateral pressure equal to that exerted by a fluid with a mass of 2.5 ton per cubic yard.

Use wood, metal, or other suitable material for forms. Keep forms clean and coat with a form release agent or form oil before placing concrete.

Place and fasten reinforcing steel according to Subsection 554.08.

601.05 Placing Concrete. Place all reinforcing steel in position and ensure that it is securely held in place by approved supports during placing of concrete. Do not place concrete until the grading, forms, and steel reinforcements have been inspected and approved by the CO. Provide 24 hours written notice prior to placement of any concrete.

Place reinforcing steel according to Section 554.

Discharge all concrete prepared using methods A and B into the forms within the time limits shown in table 601-1. These time limits are based on jobsite ambient air temperature, cement type, and admixture used. Begin counting time from when the cement is introduced into the aggregate. Discharge concrete prepared using method C into the forms within 1-1/2 hours after introducing water to the mixture. Do not retemper concrete. When required cement must be added to the mixer at the jobsite. Do not mix or place concrete when the temperature is, or is expected to be, less than 40 °F unless adequate provisions are made to protect the concrete.

Place concrete to avoid segregation. Use high-frequency internal vibrators for consolidating concrete in the forms. Operate vibrators to produce concrete free of voids, but do not hold them in one place long enough to result in segregation or formation of laitance on the surface.

Method C concrete may be rodded instead of internally vibrated as necessary to remove voids.

Do not use aluminum pipe, conduit, or troughs for transporting concrete. When concrete is pumped, take samples from the discharge stream at the point of placement. Do not apply water to plastic concrete surfaces during finishing operations.

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Table 601-1 Concrete discharge time limits.

Cement Type With and Without Admixtures Time limit (hour)

< 85 oF1 >85 oF1

Type I, IA, II, or IIA 2.0 1.5

Type I, IA, II, or IIA with water reducing or retarding admixture

3.0 2.0

Type III 1.5 1.0

Type III with water reducing or retarding admixture 2.0 1.5 1 Ambient air temperature.

601.06 Curing Concrete. Cure concrete a minimum of 7 days. If high early strength cement is used, cure concrete a minimum of 3 days. Cure according to Subsection 552.15. Finish according to Subsection 552.16 class 2 rubbed finish.

601.07 Acceptance. See Table 601-2 for sampling and testing requirements. Material for minor concrete structures including reinforcing steel, and structural steel for minor structures will be evaluated under Subsections 106.03. The concrete mixture's slump, air content, unit mass, and temperature will be evaluated under Subsections 106.02 and 106.04. See Tables 552-1 and 552-2 for specification limits.

Excavation and backfill will be evaluated under Section 209.

Construction of minor concrete structures will be evaluated under Subsections 106.02 and 106.04.

Measurement

601.08 Measure the Section 601 items listed in the bid schedule according to Subsection 109.02.

Payment

601.09 The accepted quantities will be paid at the contract price per unit of measurement for the Section 601 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

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The concrete lump sum item will be prorated based on the progress of the work under this Section.

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601.02_nat_us_03_02_2005

Table 601-2. Sampling and Testing Requirements.

Material or

Product

Type of Acceptance (Subsection)

Characteristic Category Test Methods Specifications

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Concrete Measured and tested for conformance (106.04)

Unit Weight - AASHTO T 121 One set per 32 cubic yards but not less than one per day

Point of discharge

- Upon completion of project

Air content - AASHTO T 152 or AASHTO T

Slump - AASHTO T 119 “ “ - “

Temperature - Field Measured “ “ - “

Compressive strength

- AASHTO T 22 &

AASHTO T 23

“ Discharge stream at point of placement

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602 - Culverts and Drains

602.03_nat_us_09_06_2005

602.03 General.

Add the following:

Ensure that the final installed alignment of all pipe allows no reverse grades, and does not permit horizontal and vertical alignments to vary from a straight line drawn from center of inlet to center of outlet by more than 2 percent of pipe center length or 1.0 feet, whichever is less.

602.10_0213_us_04_04_2006

602.10 Payment.

Payment for ditch blocks and catch basins shall be considered incidental to pay item 602(65).

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625 - Turf Establishment

625.03_nat_us_07_02_2007

625.03 General.

Add the following paragraph:

Seeding shall be restricted to the following time frames:

Spring seeding: from spring thaw to July 15.

Fall seeding: from August 1 until consistent ground freeze.

“Spring Thaw” shall be defined as the earliest date in a calendar year in which seed can be buried 13mm (1/2”) into the surface soil through specified seeding methods.

“Consistent Ground Freeze” shall be defined as that time during the fall months in which the surface soil, due to freezing conditions, prevents burying the seed 13mm (1/2”) through specified seeding methods.

Seeding accomplished outside the time periods listed above will be allowed only when approved in writing by the CO.

625.04 Preparing Seedbed.

Delete entire subsection and replace with the following:

Ensure that the surface soil is in a roughened condition favorable for germination and growth.

625.07 Seeding.

Insert the following paragraph after the first paragraph in (b) Hydraulic Method.

Seed type and amount of pure live seed shall be as follows:

DESCRIPTION APPLICATION RATE

Slender Wheatgrass – Agropyron trachycaulum 10PLS*/acre Mountain Brome – Bromus marginatus 10PLS/acre Canada Wildrye – Elymus canadensis 5 PLS/acre

*PLS = pounds of pure live seed Seeds available from Southwest Seed, 13260 County Road 29 Dolores, CO 81323.

Phone # 970-565-8722

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625.09 Protecting and Caring for Seeded Areas.

Delete the first sentence and add the following:

Protect and care for seeded areas until final acceptance.

625.11 Measurement.

Delete the entire Subsection and replace with the following:

Measure the Section 625 items listed in the bid schedule according to Subsection 109.02.

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635 - Temporary Traffic Control

635.03_nat_us_05_13_2004

635.03 General.

Install temporary traffic control signs to temporary posts or approved temporary sign mounts.