Attachment 4. Forest Service Specifications.pdf

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

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

Blank Page