Statement of Work CNNF Gravel Crushing.pdf

DESCRIPTION/SPECIFICATION/STATEMENT OF WORK

For Chequamegon-Nicolet National Forest Gravel Crushing

SCOPE OF WORK

The Forest Service (FS) has a requirement for the crushing, stockpiling, and testing of aggregate from designated Government sources throughout the Chequamegon-Nicolet National Forest.

The contractor shall provide all labor, materials, equipment, tools, supplies, transportation, and incidentals necessary in accordance with the following terms and specifications.

The Contractor shall utilize products and material made from biobased materials to the maximum extent possible without jeopardizing the intended end use or detracting from the overall quality delivered to the end user. All supplies and materials shall be of a type and quality that conform to applicable Federal specifications and standards. All supplies and materials to be used in the performance of work described herein are subject to the approval of the Contracting Officer Representative (COR).

LOCATION

Work shall be performed in the Pits within the following areas:

Chequamegon-Nicolet National Forest in northern Wisconsin.

Counties included on the West Side are: Ashland, Bayfield, Sawyer, Taylor, Price.

Counties included on the East Side are: Florence, Vilas, Oneida, Oconto, Langlade, and

Forest.

Government sources will be identified on project location maps.

EQUIPMENT

The Contractor shall furnish sufficient equipment necessary to crush and stockpile crushed aggregate according to the specifications within. All equipment shall be of the proper type, sufficient size, and in such mechanical condition to produce a satisfactory end product. The Contracting Officer may order the removal and require replacement of any unsatisfactory equipment.

PERSONNEL QUALIFICATIONS

The Contractor shall furnish qualified equipment operators capable of performing in a skillful and professional manner. The Contracting Officer may require the replacement of any operator considered incompetent, careless, or otherwise objectionable.

METHOD OF OPERATION IN GOVERNMENT PIT

(a) Development - Pit development work shall be in accordance with these specifications and the Pit Development Plan. Pit development shall include maintaining the pit access road, clearing and grubbing, stockpiling of topsoil and oversized rock, disposal of stumps, brush, and unsuitable material.

(b) Pit Access Road - The Contractor shall be responsible for maintaining the pit access roads.

(c) Clearing and Grubbing - In areas requiring removal of timber, trees shall be piled at a location approved by the Contracting Officer Representative. Stumps shall be grubbed as needed prior to the removal of any material for crushing. The Contractor shall pile all resulting stumps and slash in the area indicated on the Pit Development Plan and/or as approved by the Contracting Officer Representative.

(d) Operations

(1) All pit development work shall be completed by the Contractor prior to start of crushing operations. A 10-foot-wide cleared area shall be maintained along the top edge of the pit face.

(2) All available material suitable for crushing, including the floor of the existing pit, shall be utilized in the Contractor's operations. The floor of the pit shall be sloped to drain away from the pit face.

(3) Unsuitable material shall be incorporated into a disposal area designated by the Contracting Officer Representative. Oversized rock encountered during the crushing operations shall be stockpiled, away from the pit face, in an area designated by the Contracting Officer Representative. Placement of oversized rock in the area immediately adjacent to the pit face being utilized for current operations will not be allowed.

(4) Any available topsoil material encountered in the "Area to be Developed", shown on the Pit Development Plan, shall be stockpiled in the area designated by the Contracting Officer Representative.

(e) Stockpile

(1) The stockpile site shall be located as indicated on the Pit Development Plan or approved by the Contracting Officer Representative. The floor of the pit shall be uniform in slope. The Contractor shall notify the Contracting Officer Representative prior to the start of any crushing operations, to allow sufficient time for cross-sectioning of the pit floor.

(2) The stockpile shall be built up in layers 1 to 4 feet in depth, then leveled.

Material shall be deposited in a manner which prevents segregating, cones are unacceptable. The completed stockpile shall be neat and regular in form and shall be made to occupy the smallest feasible area.

(f) Site Finishing

(1) At the completion of operations in the pit, all areas disturbed by the Contractor shall be neat in appearance. The pit face shall have all overhanging material removed and be finished to approximately a 1-1/2 to 1 slope, unless otherwise directed by the Contracting Officer Representative. The floor of the pit shall be sloped to drain away from the pit face, and in such a manner that water will not collect or pocket. Placement of oversized material or debris against a face of the pit which contains crushable material will not be allowed.

(2) Material placed in the Disposal Area shall not be placed against trees. The Disposal Area shall be covered with available suitable material and seeded as directed by the Contracting Officer Representative. The completed Disposal Area shall be neat and natural in appearance and shall blend with the surrounding area.

(3) A minimum 10 foot wide cleared area shall be maintained along the top edge of the pit face.

(4) Area which the Contracting Officer Representative determines contain no additional crushable material shall be finished to a minimum 3 to 1 slope upon completion of all crushing operations. Unsuitable material may be buried within the finished slopes when approved by the Contracting Officer Representative.

Any salvaged topsoil material shall be placed over these finished slopes as directed by the Contracting Officer Representative.

(g) Seeding – Apply turf establishment to prepared ground or any disturbed area between May 15 and September 15. Apply turf establishment to the areas shown on the plans or worklists within 15 days after completion of ground disturbing activities. Seeded areas damaged by construction activities shall be reseeded within 10 days of the damage. Do not seed during windy weather or when the ground is excessively wet, frozen, or snow covered. Assure that all seed and mulch used in the work conforms to the weed free requirements. Ensure that the surface soil is in a roughened condition favorable for germination and growth.

Apply fertilizer having a chemical analysis as listed below by the following methods.

(a) Dry Method. Apply the fertilizer with approved mechanical equipment. Hand operated methods are satisfactory on areas inaccessible to mechanical equipment.

(b) Hydraulic method. Use hydraulic-type equipment capable of providing a uniform application using water as the carrying agent. Add fertilizer to the slurry and mix before adding seed. Add the tracer material when designated by the COR.

Fertilizer. Apply fertilizer at the rate of 200 pounds per acre. Insure that the fertilizer meets the following chemical analysis:

Nutrient Percent Nitrogen, N . . . . . . . . . . . . . 12% Phosphorus, P205 . . . . . . . . . 12%

Potassium, K . . . . . . . . . . . . . 12%

(1) Chequamegon-Nicolet Seeding Mixture:

Type of Seed Live Seed (Lbs/Acre)

1. Buckwheat (50% by volume) 7 lb/acre

2. Canada Wild Rye (50% by volume) 7 lb/acre Determine the pounds of seed to be furnished per acre by dividing the pounds of pure live seed required per acre by the product of the percent purity and percent germination.

Apply Mulch within 8 hours after seeding by the following methods.

(a) Dry Method. Apply mulch with a hand spreader or a spreader utilizing forced air at a rate of 2500 pounds per acre.

(b) Hydraulic Method. Apply mulch in a separate application from the seed using hydraulic-type equipment.

Apply wood fiber or grass straw cellulose fiber mulch at a rate of 2500 pounds per acre.

Apply bonded fiber matrix hydraulic mulch at a minimum rate of 2500 pounds per acre.

Apply so no hole in the matrix is greater than 0.04 inches.

Apply so that no gaps exist between the matrix and the soil.

Inaccessible areas may be mulched by hand. Apply mulch uniformly over the entire disturbed area.

Protect and care for seeded areas until final acceptance.

MATERIALS

(a) Crushed aggregate shall be crushed stone, crushed slag, or crushed gravel which conforms to the quality requirements of AASHTO M-147. Material shall be relatively free from excess vegetation, soft or disintegrated particles, lumps or balls of clay, or other deleterious substances.

During crushing operations it may be necessary to ‘reject’ material of a select gradation in order to produce finished material to the specified gradation. The approximate quantity to be rejected will be estimated by the contractor and agreed to by the COR prior to continuing operations. Reject material will be produced by continuous operation of the crushing plant and be stockpiled in an area designated by the COR away from the finished crushed material to avoid contamination. Reject material will be paid for by the CY as pay item 4a – Reject Material.

(b) Gradation Requirements

(1) Gradations of each designated size of aggregate shall be obtained by crushing and blending processes as may be necessary, and shall conform to the percentages shown on the following page:

Grading Requirements for Soil Aggregate Materials Surfacing Gradation ‘U’

Mass Percent Passing Sieve Designation

100 3/4 inch 71-90(6) 3/8 inch 50-68(7) No. 4 34-51(6) No. 8 19-30(5) No. 40 5-15.0(4) No. 200

(Percentage by weight passing, tested in accordance with AASHTO T-27) (value in parenthesis is the allowable deviation from the target value – staying within upper and lower limits)

Surfacing Gradation ‘U modified’

100 1” 96-100 3/4 inch 60-90 3/8 inch 40-68 No. 4 25-51 No. 8 15-35 No. 40 4-15 No. 200 (Percentage by weight passing, tested in accordance with AASHTO T-27)

Subbase Gradation ‘A’

100 2-1/2 inch 97-100 2 inch 65-79 (6) 1 inch 45-59 (7) ½ inch 28-42 (6) No. 4 9-17 (4) No. 40 4-8 (3) No. 200

(value in parenthesis is the allowable deviation from the target value – staying within upper and lower limits)

Gradation 'F'

100 3 inch 65-95 2 inch 28-70 ¾ inch 10-35 No. 4 4-15 No. 200

Grading Requirements for Crushed Breaker Rock

Breaker Rock Gradation ‘R’

100 4 inch 90-100 3-1/2 inch 25-60 2-1/2 inch 0-15 1-1/2 inch 0-5 ¾ inch

Culvert Bedding Gradation

100 2 inch 90-100 1-1/2 inch 95-75 1 inch 80-40 ¾ inch 45-15 ½ inch 20-0 3/8 inch

Table 705-1 Gradation Requirements for Riprap

CLASS 1 (Modified) % of Rock Equal or smaller by Count Range of intermediate dimensions (2) Range of Rock Mass (3)

100 7-11 inches 28-110 pounds 50 5-8 inches 10-42 pounds 15 4-6 inches 3-18 pounds

(2) The intermediate dimension is the longest straight-line distance across the rock that is perpendicular to the rock’s longest face with the largest projection plane.

(3) Rock mass is based on a specific gravity of 2.65 and 85 percent of the cubic value as calculated using the intermediate dimension.

Riprap rock will be evaluated by visual acceptance and evaluation. (no sieve analysis required)

2) The gradation requirements represent the extreme limits which shall determine suitability of use from all sources of supply. Tests for aggregate gradation from one source shall be uniform and as near the midpoint of individual specification limits as possible.

(c) Filler or Binder - Additional filler or binder found within the pit’s boundary shall be added as needed to meet the gradation requirements or for satisfactory bonding of the material. Filler or binder shall be uniformly blended with the other material at the crushing plant.

(d) Quality Assurance

(1 ) The Contractor shall submit in writing a quality control plan with the following information: (a) The authorities and responsibilities of testing and inspection personnel, (b) The experience and qualifications of inspection and testing personnel, (c) the name and location of any testing facility (for hire) to be used.

(2) Contractor shall obtain samples, perform quality assurance tests and submit original test reports to the Contracting Officer Representative all in accordance with AASHTO T-27.

(3) Testing frequency shall be a minimum of 1 test per 2000 cubic yards processed. Additional sampling, testing, and reports may be required by the Contracting Officer to ensure that gradation of the crushed aggregate meets contract requirements.

(4) Testing shall not be considered a final acceptance and shall not preclude later sampling and testing after final processing of the material. Such testing shall not relieve the Contractor of the responsibility of providing quality control measures to ensure compliance with contract requirements.

(5) The first test for each pit location shall be taken within the first 200 cubic yards crushed at each pit. This test shall be processed immediately, and the results shall be furnished to the Contracting Officer Representative before the end of the second day of crushing OR before 2000 cubic yards has been crushed, whichever comes first.

(6) Test results must be submitted to the Contracting Officer Representative at timely intervals throughout the Contractor's operations. All test results shall be submitted before final payment for contract quantities will be processed.

INSPECTION PROCEDURE

(a) Inspection will be made as work progresses to ensure compliance with contract items, conditions, and specifications. If any work is found unsatisfactory during on-site inspection, the unsatisfactory work will be reviewed with the Contractor by the Contracting Officer's Representative. The Contractor shall take prompt action to correct the deficiency at no additional cost to the Government.

METHOD OF MEASUREMENT

(a) Belt Scale The crushing apparatus used by the Contractor must be equipped with a belt scale to measure output. The belt scale must meet the NIST handbook #44 specifications: and must be properly calibrated and certified for 2025 by the Wisconsin DOT.

(1) The Contractor shall not begin crushing operations until the Contracting Officer Representative has verified the initial belt scale reading.

(2) Crushing operations shall not be completed until the Contracting Officer Representative has verified the final belt scale reading.

(3) Any shortage in contract quantities shall be the responsibility of the Contractor and shall be corrected before payment is issued.

(4) Material crushed in excess of the contract amount becomes the property of the Government with no restitution to the Contractor.

PAYMENT

(a) The yardage of crushed aggregate, determined as provided above, shall be paid for at the contract unit price per cubic yard of material stockpiled. Yardage will be determined based on a unit weight of 3,000 pounds per cubic yard of material crushed. Price and payment shall constitute full compensation for furnishing labor and equipment, tools and supervision, performing required work, including all incidentals necessary to satisfactorily complete this contract in accordance with these specifications.

(b) One acceptable quality assurance test per 2000 cubic yards of aggregate will be paid for at the contract unit price.

(c) Upon completion and acceptance of all pit development items including final shaping and final cleanup, the pit development and restoration will be paid for as a total Lump Sum (all associated work at each pit) at the contract unit price.

(d) Upon completion and acceptance of the work performed and receipt of the quality assurance test reports, the Contracting Officer will process the Contractor's invoice for payment.

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