Attachment 6. Specifications.pdf

USDA Forest Service Pacific Southwest Region

Specifications for Maintenance of Roads

R5 Regional Office – USFS

01/2021

PREFACE

The Pacific Southwest Region of the Forest Service has developed this document for use in the preparation and administration of maintenance requirements included in Public Works Contracts.

Included are the Specifications for Maintenance of Roads that commonly apply in Public Works Contracts. Conditions and requirements specific to individual projects that requires the use of supplemental specifications shall be coordinated between Engineering and the Contracting Officer. Include Definitions, Abbreviations, Quantity Measurement Terms, and Contract Language sections in all contracts.

Supplemental Specifications, which do not change the intent of the parent section, may be approved jointly by the Forest Engineer and the Contracting Officer.

Road maintenance activities are covered under the McNamara-O’Hara Service Contract Act (SCA). SCA provisions are applicable to service contracts over the $2,500 threshold performed in the United States. A service contract directly engages the time and effort of a contractor whose primary purpose is to perform an identifiable task, rather than to furnish an end item of supply.

Road Maintenance activities covered under SCA are those that are routine and recurring in nature. These activities typically involve maintaining the infrastructure in a condition so that it may continually be utilized. Examples of activities covered under the SCA include:

• Brushing and mowing

• Grading

• Rock raking

• Removal of oversized materials

• Ditch cleaning and brushing

• Cleaning of culverts

• Decommissioning of roads (without construction of any new features or repair of any existing features)

Small repair activities may be appropriate under the SCA provided that the duration of all such work is less than 32 hours in the overall effort and these efforts are an integral part of the project.

Such activities include:

• Minor culvert and drainage repair

• Minor incidental patching done in conjunction with normal maintenance (pot holes)

• Minor aggregate spot surfacing

• Minor slump and slide removal

• Sign, cattleguard, gabion and guardrail repair

DEFINITIONS

Wherever in these specifications, or in other contract documents, the following terms, or pronouns in place of them, are used, the intent and meaning shall be interpreted as follows:

1. Agreed or Approved - Official agreement or approval by use of a written document issued by the

Government. Agreements also require signature of Contractor's Representative and are dated.

2. Base Course - The layer or layers of specified or selected material of designed thickness placed on a subbase or a subgrade to support a surface course. (See Drawing 801-1, Illustration of Road

Maintenance Terms)

3. Berm - A curb or dike which controls roadway runoff water or delineates traffic direction. Berms are commonly placed parallel to road centerline; however, on Limited Use Roads (Section 838) may be placed diagonally across the roadbed. (See Drawing 801-1, Illustration of Road Maintenance

Terms)

4. Channel - A natural waterway leading into or away from a culvert or bridge.

5. Contract Modification - A bilateral written supplemental agreement between the Government and the Contractor, documenting a modification outside the scope of the contract and establishing an equitable adjustment therefor.

6. Contractor - The individual, partnership, joint venture, or corporation undertaking the execution of the work under the terms of the contract.

7. Culver - Any structure, not classified as a bridge that provides an opening under the roadway.

8. Cross Ditch - A shallow ditch placed across the roadbed to remove water from the roadbed surface which can be driven across by full-size pickups or other high clearance vehicles; usually placed diagonal to the centerline. (See Section Drawing 838-1, Cross Ditching of Limited use

Roads)

9. Lead-off Ditch - A ditch used to remove water from roadside drainage ditches, the roadway, cattleguards, or drainage structures such as culverts and drainage dips.

10. Drainage Ditch - A relatively long narrow excavation placed to collect or disperse water, located parallel to and abutting the roadbed. (See Drawing 801-1, Illustration of Road Maintenance

Terms)

11. Drainage Dip. A drainage structure that was previously constructed within the roadbed surface to form a uniform depression that allows routine passage of vehicles while diverting water from the traveled way.

12. Drainage Structure - A term identifying man-made devices placed to control water movements.

13. Drawings - Illustrations showing detailed maintenance required.

14. Equipment - All machinery, operating supplies and tools necessary for the proper performance and acceptable completion of the work.

15. Excess Material - Material from the roadway excess to that needed for maintenance of roadway.

16. Fore Slope - The slope of the ditch section nearest to the traveled way. (See Drawing 801-1, Illustration of Road Maintenance Terms)

17. Government - The Contracting Officer or the duly authorized Contracting Officer's Representative

(COR) with authority to sign orders.

18. Grade - The vertical alignment of the top surface of the road.

19. Inspector - The Government's authorized representative designated in writing, assigned to make detailed inspections of contract performance, but not to sign orders to the Contractor.

20. Materials - Any substances specified for use in the performance of the work.

21. Measurement – The process of identifying the dimensions, quantity, or capacity of an item.

22. Nominal Dimensions or Weights - The numerical values shown on the drawings or in the specifications as measurements for the work.

23. Work Order - A written order by the Government directing fulfillment of work requirements under the terms of the contract.

24. Original Contract Quantities - Those estimated quantities shown in the Schedule of Items as awarded.

25. Patching - Minor repairs to the roadway surface.

26. Paved Surface or Pavement - Denotes asphalt, concrete, or other stabilized materials excluding natural aggregates. Dust palliative treatments are not considered as pavement.

27. Reasonably Close Conformity - Means compliance with customary maintenance tolerances where working tolerances are not specified.

28. Right-of-Way – A general term denoting land, property, or interest therein acquired for or devoted to a road. (See 801-1, Illustration of Road Maintenance Terms)

29. Roadbed - The portion of a road between the intersection of the subgrade and side slopes, excluding that portion of the ditch below the subgrade. (See Drawing 801-1, Illustration of Road

Maintenance Terms)

30. Road Listing - A preliminary listing of road locations and any established work priorities.

31. Roadside – All area within the right-of-way excluding the traveled way and shoulders (See

Drawing 801-1, Illustration of Road Maintenance Terms)

32. Schedule of Items - Schedule containing a listing and description of maintenance items, quantities, units of measure, unit price, and amount.

33. Shoulder - As used in this contract, the term is restricted to roads having a paved surfacing. The portion of the roadway contiguous to the traveled way for the accommodation of stopped vehicles, for emergency use, and for lateral support of the pavement structure (See Drawing 801-1, Illustration of Road Maintenance Terms)

34. Slough or Slide - Material deposited on the roadway which may need to be repositioned or removed.

35. Slump - A localized portion of the roadbed which has slipped or otherwise become lower than that of the adjacent roadbed and constitutes a hazard to traffic.

36. Special Project Specifications - Specifications which detail conditions and requirements to a particular individual project.

37. Standard Specifications – Specifications for specific divisions of work.

38. Subgrade – Top Surface of roadbed upon which subbase, basecourse. or surface sit.

39. Subgrade - Top surface of roadbed upon which subbase, base course, or surface course was constructed. (See Drawing 801-1, Illustration of Road Maintenance Terms)

40. Traveled Way - The portion of the roadway for the movement of vehicles. For purpose of this contract, traveled way includes turnouts and curve widening. (See Drawing 801-1, Illustration of

Road Maintenance Terms)

41. Turnouts - A short auxiliary lane on a one-lane road provided for passage of meeting vehicles.

42. Unit of Measure - The unit and fractions of units shown in the Schedule of Items.

43. Unsuitable Material - Material removed during maintenance which must be disposed of in designated locations. Includes material with substantial amounts of vegetation or other objectionable material.

44. Waterbar - A deeper type cross ditch which is not intended for passage of standard passenger vehicles. This structure intercepts runoff from both the road surface and ditch adjacent to the roadbed.

45. Work Schedule - The Contractor's current schedule for work progression.

QUANTITY MEASUREMENT TERMS 1

ABBREVIATIONS

Whenever in these specifications, or in other contract documents, the following terms, or pronouns in place of them, are used, the intent and meaning shall be interpreted as follows:

(Reference to a specific standard or specification shall mean the latest addition or amendment thereto in effect on date of Invitation for Bids.)

1. AASHTO - American Association of State Highway and Transportation Officials.

2. CS - Commercial Standard Issued by U.S. Department of Commerce.

3. EPA - Environmental Protection Agency.

4. FAR - Federal Acquisition Regulation System.

5. FED SPEC - Federal Specifications.

6. FSS - Federal Specifications and Standards.

7. MSHA - Mine Safety Health Administration.

8. MUTCD - Manual of Uniform Traffic Control Devices.

9. NBS - National Bureau of Standards.

10. OSHA - Occupational Safety and Health Act.

11. PS - Product Standard issued by the U.S. Department of Commerce.

12. UL - Underwriter's Laboratories, Inc.

13. ASTM – American Society for Testing and Materials

QUANTITY MEASUREMENT TERMS 2

QUANTITY MEASUREMENT TERMS

Measurement under the contract shall be according to the United States standard measure. The methods of measurement and computation will be those necessary to accurately determine the quantities of materials furnished and work performed. Measurement will be made of each item or unit of work, as shown in the Schedule of Items, completed and accepted in accordance with the contract provisions, specifications, and drawing.

1. All items which are measured by the linear foot, will be measured parallel to its longitudinal centerline, unless otherwise shown on the drawings.

2. A station when used as a definition of term or measurement will be 100 linear feet or as identified in project plans.

3. Miles will, in the absence of known distances from existing plans or surveys, be determined by the Government using a calibrated survey odometer or equal substitute operated on the traveled way at or parallel to road centerline. Single lane mile measurement will mean the product of the road length in miles times the equivalent number of continuous traveled way lanes on the road. On two (2) lane roads, the lane miles will be twice the length of the road segment maintained. On one (1) lane roads, the added length of turnouts will be determined by using a factor that includes the cumulative length of the turnouts. Unless a different factor is established in Special Project Specifications or listed for each affected one (1) lane road in the

Road Listing, forty percent (40%) of the road will be considered as having turnouts; this yields a factor of one point four (1.4) times the length in miles of the road segment maintained. This adjustment applies only to work performed under Section 811.

4. The term "ton" will mean the short ton consisting of 2,000 pounds avoirdupois. Trucks used to haul material measured by truck weight shall be weighed empty at least once daily, and each truck shall bear a plainly legible identification mark. Weigh tickets furnished by the Contractor from certified scales will be used to determine weight measurements.

5. Materials measured by the cubic yard in the hauling vehicle shall be measured therein at the point of delivery. Vehicles may be of any size or type, provided that the box is of such shape that the actual volume may be readily and accurately determined.

QUANTITY MEASUREMENT TERMS 3

6. Measurement by the acre will use the length and width treated. Measurement of width will approximate significant slope breaks, but will not include minor deviations along the slopes. The measured slope distance for width will be multiplied by the length treated and converted to a standard 43,560 square foot acreage value of the surface area treated.

7. Volume of bituminous products will be measured at 60° F, using ASTM D-1250 for asphalts except the quantity of emulsified asphalt will be determined by measuring the emulsified asphalt at a temperature of 60° F, or by converting the gallonage measured at another temperature to gallonage at 60° F by means of the following formula:

Gallons. at 60° F = Gallons at A° F

1+0.00025 (A° F − 60° F)

In which A° F is the temperature of the material at the time the gallonage is measured.

8. The term "lump sum" when used in the Schedule of Items will mean the complete unit as required by or described in the contract.

CONTRACT LANGUAGE 1

CONTRACT LANGUAGE

The following information is provided for inclusion in contracts as needed. This list is not complete, contact your Contracting Officer for all provisions.

1. INSPECTION AND ACCEPTANCE

a. Far 52.246 Inspection of Services – Fixed Price.

2. ACCEPTANCE OF BULK LIQUID PRODUCTS

The following certifications shall accompany shipments:

a. At the time of delivery of each load of products to be incorporated into the work, the Contractor shall furnish to the Government one copy of the Bill of Lading and a fully executed Certificate of Compliance conforming to the format established for the product in Section 892 and 894. A separate Certificate of Compliance will not be required if the standard Bill of Lading contains the information required by the certificate.

b. Sampling - Sampling of products may be required to validate certificates furnished by the Contractor. When sampling is directed by the Government, the actual samples will be taken by the Contractor in the presence of the Government. All delivery and distribution equipment shall be constructed to permit sampling in conformance with AASHTO T-40 test procedures.

Samples shall be obtained from hauling units at the point of delivery.

1) Final Acceptance - Final acceptance or rejection of the material will be in accordance with other clause(s).

3. PROSECUTION OF WORK

a. Work shall be scheduled to provide completion of segments on a daily basis unless otherwise herein provided.

CONTRACT LANGUAGE 2

b. A monthly Work Schedule shall be prepared by the Contractor based on priorities provided in the contract unless superseded by the Government in advance of work by Work Order. A copy of the Work Schedule shall be provided to the Government by the agreed day of each month.

c. The Government may require the Contractor to finish the portion in progress before additional work is started on any additional portion

4. PUBLIC OFFICIALS NOT PERSONALLY LIABLE

There shall be no personal liability upon the Government or officer in charge, their agents or employees, for any act performed in the discharge of any duty imposed of the exercise of any power or authority conferred upon them, by, or within the scope of the contract, it being understood that in all such matters they act solely as agents and representatives of the Government.

5. PREW ORK CONFERENCE

Prior to commencement of work, the Contractor shall meet with the Government to discuss contract terms and work performance requirements, Work Progress Schedule, and Fire Prevention and

Suppression Plans. The meeting will be held at the local Government District or Supervisor's Office, unless otherwise agreed.

6. EQUIPMENT REQUIREMENT

When the Contractor is paid for furnishing and operating equipment on an hourly or daily basis, it shall be operated at its design speed, or the maximum speed feasible under prevailing conditions.

7. STORAGE OF MATERIALS AND EQUIPMENT

Materials shall be stored to assure the preservation of their quality and fitness for work. Approved portions of the right-of-way or other areas on Government land may be used for storage purposes. All storage sites approved by the Government shall be restored to a satisfactory condition at the

Contractor's expense.

8. USE OF PREMISES

CONTRACT LANGUAGE 3

a. General - The Contractor shall comply with the regulations governing the operation of premises which are occupied and shall perform the contract in a manner that will not interrupt or interfere with the conduct of Government business.

b. Camps - Before any camp or storage site is opened or operated on National Forest land or lands administered by the Government, written permission shall be obtained through the Government. Camp is interpreted to include the campsite or trailer parking area of any employee or subcontractor working on the project. Such permission, if granted, will be without charge to the Contractor.

c. National Forest Road Rules applicable to the National Forest where the work is occurring are made a part of the contract by reference. Copies will be furnished on request.

9. LANDSCAPE PRESERVATION

The Contractor shall give attention to the effect of contract operation upon the landscape, shall take care to maintain natural surroundings undamaged, and shall conduct the work at all times in compliance with the following requirements:

a. Prevention of the Landscape Defacement. The Contractor shall not remove, deface, injure, or destroy trees, shrubs, lawns, or natural features unless specifically authorized by the Government. Unless otherwise provided in the Special Project Specifications, the Contractor shall confine contract operations to within the areas designated in contract documents. Unless otherwise provided in this contract, the Contractor shall gather rock which falls outside the roadway due to contract operations and dispose of it as directed by the Government.

b. Protection of Streams, Lakes, and Reservoirs. The Contractor shall take sufficient precautions to prevent pollution of streams, lakes, small ponds, and reservoirs with fuels, oils, bitumen’s, dust palliatives, silt, or other harmful materials. Mechanical equipment shall not be operated in live streams without written approval of the Government.

10. LEGAL RELATIONS AND RESPONSIBILITIES

a. Government's Responsibility for Utilities

1) The Government will notify all utility companies or other parties affected and make arrangements for all necessary adjustments of the public or private utility fixtures, pipelines, and other appurtenances affected by work under the contract.

CONTRACT LANGUAGE 4

2) The Government will identify, in Special Project Specifications, known locations of underground installations other than culverts and drains the Contractor could encounter in the progress of work under the contract; typically telephone cables, water supply pipes and induction loops within the pavement.

b. Contractor's Responsibility for Utilities

1) In the event of interruption to utility services because of accidental breakage the Contractor shall promptly notify the utility authority and shall cooperate with that authority in the restoration of service.

c. Railway-Road Provision

1) The Government will make arrangements with the railway for any rights necessary to maintain roads across existing crossings

805 MOBILIZATION 3

805 MOBILIZATION (5/97)

1. DESCRIPTION

This Section consists of one or more mobilizations of personnel, equipment, supplies, and incidentals to the project site, or sites listed in the Schedule of Items.

2. MEASUREMENT

When the contract establishes separate work periods within the contract time any additional mobilization included as a Bid Item will be retained until the actual work period.

3. PAYMENT

a. Progress payments will be made on the basis of the Bid Items contained in the Schedule of Items as follows:

1) When five (5) percent of the estimated contract amount in the work period is earned, fifty

(50) percent of the amount of mobilization will be paid.

2) When twenty-five (25) percent of the estimated contract amount in the work period is earned, one hundred (100) percent of the amount for mobilization will be paid.

3) The total sum of all payments under this Section shall not exceed 10% of the total contract amount

4) The contract amount for mobilization shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals involved in mobilization.

b. Payment will be made under:

Pay Item Description Pay Unit

805 (1) Mobilization work period from __________ to

Each

808 WORK AREA MANAGEMENT 1

808 - W ORK AREA MANAGEMENT (5/97)

This Section establishes Contractor responsibilities for traffic control and equipment requirements in work areas.

2. REQUIREMENTS

a. Traffic Conditions - Roads other than those listed for work under Section 835 shall be open to traffic with not more than fifteen (15) minutes maximum delay time unless otherwise provided in Special Project Specifications.

b. Work which interferes with use of traveled roadways shall not be initiated or performed until a plan for satisfactory handling of traffic has been approved by the Government.

3. TRAFFIC CONTROL DEVICES

a. The Contractor shall provide signs and other devices complying with National Standards as contained in Part VI of the Manual of Uniform Traffic Control Devices (MUTCD). Traffic control for occupied work areas shall be in accordance with these specifications. All signs and devices remain the property of the Contractor.

b. Traffic devices shall be kept current with maintenance operation and removed upon its completion.

c. Traffic approaching the work area from either direction and side accesses having standard Government rectangular -or trapezoidal- shaped route markers with horizontal numbering shall be warned by signing.

d. Required signs may be mounted on portable or temporary mountings. Standard MUTCD shapes, colors, sizes, and legends shall be used.

e. Hazards incidental to the work within or on the traveled way, shoulders, or turnouts shall be marked with hazard identification markers, illuminated beacons, and other MUTCD devices to safely guide road users through the area. Work segments not completed on a daily basis shall be marked appropriately for night travel. Contractor shall obtain authorization before commencing work at night.

f. Advisory speed plates may be used to control traffic through the work area.

808 WORK AREA MANAGEMENT 2

1) Flaggers - Properly equipped flag person(s) shall be provided where the traffic is required to stop before proceeding. Traffic shall be stopped in locations which provide width enough for passage of traffic and reasonable protection for vehicles. When flag control is used, advance warning signs are required.

4. CONTRACTOR’S EQUIPMENT

a. All vehicles and machinery operating on or from the traveled way or road shoulder shall have flashing lights, strobes, or rotary beacons operated continuously while work is in progress. Truck headlights shall be on while operating. Back-up horns shall be required on all self-propelled equipment in excess of 10,000 lbs. gross weight.

b. Vehicles and machinery not currently used in the maintenance operation shall be parked off the traveled way at approved locations to minimize interference with normal use.

5. MEASUREMENT AND PAYMENT

No separate measurement or payment will be made for meeting requirements of this Section. All work and materials shall be incidental to paid work in this contract.

6. CONTROL STAKES

The Contractor is responsible for the preservation of existing bench marks and other control points. The cost of replacing them may be charged against the Contractor and may be deducted from the payment for the work. If the Contractor finds a missing stake he will notify the Government who will replace the missing stake within two (2) days.

811 BLADING 1

811 BLADING (5/97)

This work consists of surface blading native or aggregate roadbed to a condition to facilitate traffic and provide proper drainage. Blading includes shaping the crown or slope of traveled way, berms, and drainage dips in accordance with this specification.

2. MAINTENANCE REQUIREMENTS

a. Timing

1) Surface blading shall be performed during the contract period as ordered by the Government. Contractor shall commence surface blading within two (2) contract days after receipt of written order unless otherwise stated in the order.

b. General

1) The existing traveled way and shoulders, including turnouts unless otherwise ordered, shall be bladed and shaped to produce a surface which is uniform, consistent to grade, and crowned or cross-sloped as indicated by the character of the existing surface unless otherwise shown in the Road Listing, to at least one half inch (1/2") per foot of width, but not more than three quarter inch (3/4") per foot of width. Surfacing materials shall be thoroughly loosened to no less than 2 inch depth or the depth of potholes or corrugations. Scarification to facilitate cutting to the full depth of potholes or corrugations may be elected by the Contractor but will be considered incidental to blading. Scarification shall not go deep enough to cause contamination of the surfacing.

2) When Section 891 is included in the Road Listing, the Contractor shall apply water during blading when sufficient moisture is not present to prevent segregation. Water supply, hauling, and application shall be in accordance with Section 891 and shall be incidental to blading unless Pay Items for Section 891 are included in the Schedule of Items.

3) Existing native, rock or aggregate surfaced drainage dips shall be shaped incidental to blading to divert surface runoff to existing outlet devices, ditches and discharge locations.

4) The Contractor shall establish a blading pattern which provides a uniform driving surface, retains the surfacing on the roadbed and provides a thorough mixing of the materials within the completed surface width. Upon final blading, no disturbed rock shall protrude more than two (2) inches above the adjacent surface unless otherwise provided in the contract.

Material not meeting this dimension shall be removed and placed outside the roadbed so as not to obstruct drainage ways or structures. This material may be scattered off the roadbed if there is free drainage.

c. Routine Blading

811 BLADING 2

1) Upon completion of blading, the surfaces shall conform to the dimensions shown in the Special Project Specifications 811-3.

2) Roadbed width in excess of the dimensions shown shall be shaped only as needed to provide drainage away from the traveled way. Established grasses and other vegetation shall not be removed from the excess width except as incidental to providing drainage or unless otherwise provided in the contract.

d. Compaction

1) Roads requiring compaction will be included in the Road Listing. Compaction shall be performed in accordance with Special Project Specification 811-1.

e. Intrusions

1) Where the minimum width shown in the Special Project Specifications is not available, the Contractor will construct berms where ordered and marked on the ground. Material to provide berms will come from sources designated in the Special Project Specifications.

f. Undercutting

2) Roadway back slope shall not be undercut.

g. Intersections

1) At intersections, the roadbeds of side roads which are not closed or restricted from vehicular use shall be bladed to assure smooth transitions.

2) Field evidence of closure or restrictions shall be considered to be signing, cross ditching in the road surface (traveled way), earth berms or other devices placed to discourage or eliminate use by passenger cars, also roads listed for work under Sections 835 or 838 shall be considered restricted.

3) Side roads listed for work under this Section shall be considered as not restricted.

h. Cleaning of Structures

1) Materials resulting from work under this Section shall not be allowed to remain on or in structures, such as bridges, culverts, cattleguards, or drainage dips.

i. Berms

1) Existing berms shall be maintained to the condition of adjacent segments when ordered by the Government.

3. MEASUREMENT

Measurement under this Section will be made by the total number of units for each item listed in the

Schedule of Items completed and accepted.

811 BLADING 3

a. Measurement for blading will be single-lane mile measured along the centerline of the roadway (see quantity measurement terms). Two-lane roads will be measured as two (2) single-lane miles. Measurement will be measured to the nearest one-tenth (0.1) mile.

b. Each intersection bladed under 2.g. will be equivalent to one-tenth (0.1) single-lane mile;

however, when the intersecting side road is scheduled for subsequent blading under this Section, no measurement will be made.

c. Berm maintained or established will be measured by linear foot.

4. PAYMENT

a. The quantities measured and accepted will be paid for at the contract unit price shown in the Schedule of Items.

b. Payment will be made under:

811 (1) Blading Surfaced Roads Single-Lane

Mile

811 (2) Blading Native and Pit Run Roads Single-Lane

Mile

811 (3) Berm Maintained Linear Foot

811 (4) Establishing Berms Linear Foot

811-1 SPECIAL PROJECT SPECIFICATIONS, BLADING 1

SPECIAL PROJECT SPECIFICATION

811-1 BLADING (5/97)

Add the following:

Compaction is required when shown on the road listing.

d. Compaction - add the following:

2) Unless Compaction Method B is included in the Schedule of Items and Road Listing, all traveled ways requiring compaction shall be compacted by Method A.

Compaction shall commence immediately following blading. Compaction methods are:

a) Compaction Method A: By breaking track while operating equipment on the traveled way.

b) Compaction Method B: 8-10 ton pneumatic, steel or equivalent vibrating roller, operated to cover the full width two (2) times

No measurement will be made under this Section for Compaction Method A. Measurement for

Compaction Method B will be the same as stated in 3.a for blading.

811 (5) Blading Compaction – Method B Single-Lane

Mile

811-2 SPECIAL PROJECT SPECIFICATIONS, BLADING 1

SPECIAL PROJECT SPECIFICATIONS

811-2 BLADING (5/97)

Smooth blading shall remove loose surfacing materials from the wheel paths and store the removed materials in a recoverable windrow.

b. Add the following:

5) Watering will not be required for smooth blading. Smooth blading shall be accomplished without distorting the existing cross-slope or crown of the traveled way.

Loose surfacing materials shall be moved and stored on the high side of super-elevated curves and sections with uniform inslope or outslopes. In crowned sections, the material shall be stored on either or both sides as elected. Stored materials shall be windrowed and shall be placed to provide not less than eleven (11) feet of smoothed traveled way on one- lane segments or twenty (20) feet of smoothed traveled way on two-lane or sections with turnouts. Windrows which may collect water on the road shall have holes cut through for drainage at least every 500 feet.

Measurement for smooth blading will be the same as stated for blading in 3.a.

811 (6) Smooth Blading Single-Lane

Mile

893 AGGREGATE 1

893 AGGREGATE (5/97)

1. GRADATIONS

a. Gradations for aggregates are included in Special Project Specifications for contracts where the aggregates are not provided by the Government.

b. The inclusion of aggregate gradations does not constitute a warranty by the Government that commercial sources in the area are producing the gradation indicated. Aggregates commercially produced to meet State or County gradations and specifications for similar materials will be considered an equal alternate to the gradation in the contract provided the following quality requirements are met. Contractor shall provide testing and certification of supplied materials.

2. AGGREGATE FOR BITUMINOUS PLANT-MIX

a. Coarse Aggregate - Coarse aggregate (retained on the No. 8 sieve) shall be crushed stone or crushed or natural gravel and shall conform to the quality requirements of AASHTO M 63.

Gradation shall conform to the provisions of the Special Project Specifications.

b. Fine Aggregate - Fine aggregate (passing the No. 8 sieve) shall be manufactured and conform to the quality requirements of AASHTO M 29 (ASTM D 1073). It shall be of such a gradation that when combined with the other required aggregate fractions in the proper proportion, the resultant mixture will meet the gradation required.

3. AGGREGATE FOR BITUMINOUS ROAD MIX

a. Aggregates for bituminous road mix shall be crushed stone, or crushed or natural gravel which meets the quality requirements of AASHTO M 62 or M 63 for the specified gradation, except the sodium sulfate soundness loss shall not exceed 9 percent. The swell test will not be required.

b. Gradation shall be as shown in the Special Project Specifications. When crushed gravel is used, not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face.

4. AGGREGATE FOR SPOT SURFACING

a. Aggregates for spot surfacing shall be crushed stone, crushed slag, or crushed or natural gravel which conforms to the quality requirements of AASHTO M 147, or as specified in the Special Project Specifications, except as noted below: The requirements of M 147 shall apply, except that the liquid limit shall not exceed 35 and the plasticity index shall be not be less than 4 nor more than 9.

893 AGGREGATE 2

b. Aggregate gradation shall conform to the provisions of the Special Project Specifications and

AASHTO M 147.

c. When crushed gravel is used, not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face.

d. Gradations of each designated size of aggregates shall be obtained by crushing, screening, and blending processes as may be necessary.

e. Materials otherwise meeting the requirements of this subsection will be acceptable whenever the gradations of such materials are within the tolerances corresponding to the selected sieve sizes required by the Special Project Specifications and whenever such materials produce a compacted course meeting density requirements as specified in Specification Section 811(2)(e).

5. AGGREGATE FOR BITUMINOUS CONCRETE - GENERAL

a. Coarse Aggregate

1) Coarse aggregate (retained on the No. 8 sieve) shall be crushed stone, crushed slag, or crushed or natural gravel, and unless otherwise stipulated, shall conform to the quality requirements of AASHTO M 79.

2) Lightweight aggregate, if required or permitted by the Special Project Specifications, shall meet the requirements of AASHTO M 195.

3) When crushed gravel is used, it shall also meet the requirements of Section 2.1 of AASHTO M 62 and not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. The coarse aggregate shall be of such gradation that when combined with other required aggregate fractions in proper proportion, the resultant mixture shall meet the gradation required under the composition of mixture for the specific type under contract.

b. Fine Aggregate

1) Fine aggregate (passing the No. 8 sieve) shall consist of natural sand, stone screenings, or slag screenings, or a combination thereof, and unless otherwise stipulated shall conform to the quality requirements of AASHTO M 29 (ASTM D 1073). Fine aggregate shall be of such gradation that when combined with other required aggregate fractions in proper proportion, the resultant mixture shall meet the gradation required under the composition of mixture for the specific type under contract.

2) Lightweight aggregate If required or permitted by the Special Project Specifications, shall meet the requirements of AASHTO M 195.

6. AGGREGATE FOR BITUMINOUS HOT PLANT-MIX

a. The provisions of 5(a) and 5(b) herein shall apply.

893 AGGREGATE 3

b. The several aggregate fractions for the mixture shall be sized, and blended to meet one of the grading requirements of the Special Project Specifications as specified on the drawings.

7. AGGREGATE FOR COLD PLANT-MIX BITUMINOUS PAVEMENT

a. The provisions of 6(a) and 6(b) herein shall apply.

1) Aggregate for Pavement - The several aggregate fractions for the mixture shall be sized, graded, and combined in such proportions that the resulting composite blend meets one of the grading requirements of the Special Project Specifications as specified on the drawings.

2) Aggregate for Top Dressing

a) The material for the top dressing shall consist of dry sand, stone screenings, or slag screenings meeting the grading requirements of the Special Project

Specifications as specified on the drawings.

b) Lightweight aggregate, if required or permitted by the Special Project

Specifications, shall meet the pertinent requirements of AASHTO M 195.

8. AGGREGATE FOR ROAD MIX BITUMINOUS PAVEMENT

a. Aggregates for road mix bituminous pavement construction shall be crushed stone, crushed slag, or crushed or natural gravel which meet the quality requirements of AASHTO M 62 or M 63 for the specified gradation, except that the sodium sulfate soundness loss shall not exceed 12 percent.

b. When crushed gravel is used, at least 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. Gradation shall conform to the grading requirements of the Special Project Specifications as specified on the drawings.

c. Lightweight aggregate, if required or permitted by the Special Project Specifications, shall meet the pertinent requirements of AASHTO M 195.

9. AGGREGATE FOR COVER COATS, SURFACE TREATMENTS, AND BITUMINOUS

PRESERVATIVE TREATMENT

a. Aggregates shall meet the quality requirements of AASHTO M 78.

b. When tested in accordance with AASHTO T 182 (ASTM D 1664), aggregate shall have a retained bituminous film above 95 percent.

c. Aggregates which do not meet this requirement may be used for bituminous surface treatments and seal coats provided an approved chemical additive or wetting agent is used to provide a water resistant film.

893 AGGREGATE 4

d. Lightweight aggregate if required or permitted by the Special Project Specifications, shall meet the pertinent requirements of AASHTO M 195.

e. When crushed gravel is used, not less than 50 percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. Aggregates shall meet one of the grading requirements of the Special Project Specifications.

893-1 SPECIAL PROJECT SPECIFICATION 1

AGGREGATE

SPECIAL PROJECT SPECIFICATION

893-1 AGGREGATE (4/99)

4. AGGREGATE FOR SPOT SURFACING

Add the following to paragraph b.:

Crushed Aggregate for Base Course: Crushed aggregate for base course shall be crushed stone, slag or gravel, and shall be free of organic matter and other deleterious substances.

Crushed aggregate for base course shall meet the following quality requirements:

Resistance (R-Value), AASHTO T 190 . . . 78 Minimum

Sand Equivalent, AASHTO T 176 . . . . . 25 Minimum

Durability Index, Coarse and Fine, AASHTO T 210 . . . . . . 35 Minimum

Crushed aggregate for base course shall meet the requirements of Table 893-1 below, for the grading shown in the SCHEDULE OF ITEMS.

Crushed aggregate grading requirements for base course:

Table 893-1 Percent Passing (AASHTO T-11 and T-22)

5. AGGREGATE FOR BITUMINOUS CONCRETE – GENERAL

Add paragraph c.:

c. AGGREGATE FOR DENSE-GRADED HOT BITUMINOUS PAVEMENT. All aggregate shall be clean and free from decomposed material, organic material and other deleterious substances. The aggregate shall meet the following requirements.

Sieve 1 ½ " Max ¾ " Max

2-inch 100 -

1 1/2-inch 90-100 -

1-inch - 100

3/4-inch 50-85 90-100

No. 4 25-45 35-60

No. 30 10-25 10-30

No.200 2-9 2-9

893-1 SPECIAL PROJECT SPECIFICATION 2

AGGREGATE

1) Coarse Aggregate. Coarse aggregate shall consist of crushed stone or crushed gravel retained on the No. 4 sieve. At least 25 percent by weight shall be crushed particles having more than one fractured face, and at least 50 percent by weight shall have at least one fractured face.

2) Fine Aggregate. Fine aggregate shall consist of material passing the No. 4 sieve. At least 20 percent by weight of the particles passing the No. 4 sieve and retained on the No. 8 sieve shall be crushed particles having at least one fractured face. The remainder may consist of natural fine aggregate.

3) Combined Aggregate. The combined aggregate shall not have a percent wear greater than 50 when tested in accordance with AASHTO I 96, and shall not have a sand equivalent of less than 45 when tested in accordance with AASHTO T 176, When there is a difference of 0.20 or more between the bulk specific gravity (AASHTO T 85) of the coarse aggregate and the apparent specific gravity (AASHTO T 84) of the fine aggregate, the blend of aggregates shall be modified by California Test No. 105. The combined aggregate gradation shall meet the requirements of Table 893-2 below for the grading shown in the SCHEDULE OF ITEMS.

Table 893-2--Crushed aggregate grading requirements for dense graded (DG) hot bituminous pavement.

Percent Passing (AASHTO T-11 and T-27)

Sieve Grading DG-1

(3/4in.Maximum)

Grading DG-2

(1/2in.Maximum)

Grading DG-3

(3/8in. Maximum)

Grading DG-4

(No.4 Maximum)

1-inch 100 - - -

3/4-inch 95-100 100 - -

1/2-inch - 95-100 100 -

3/8-inch 65-80 80-95 95-100 100

No. 4 44-59 54-71 67-83 95-100

No. 8 31-45 38-54 52-69 66-83

No. 30 13-26 17-32 23-40 30-50

No. 200 3-8 3-8 3-10 3-12

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