Amend-0002_TechSpecs.pdf

McNary Parking At Top Of Dam W912EF-17-Q-0066 Amend-0002

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 22 00.00 28

MEASUREMENT AND PAYMENT

PART 1 GENERAL

1.1 RETAINAGE OF PAYMENT

1.2 ITEM 0001 TOP OF DAM PARKING WITH BARRIER WALL

1.3 ITEM 0002 PAVING, STRIPING, WHEEL STOPS, AND SAW CUTTING (OPTIONAL)

1.4 ADDITIONAL AGGREGATE BASE MATERIAL (OPTIONAL)

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

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SECTION 01 22 00.00 28

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SECTION 01 22 00.00 28

MEASUREMENT AND PAYMENT

PART 1 GENERAL

In each instance, the contract price for an item shall constitute full compensation for furnishing all plant, labor, equipment, and materials, and for performing all operations required to complete the work included in the item as herein specified, or as otherwise approved.

1.1 RETAINAGE OF PAYMENT

Retainage in the amount of 10 percent of original contract award amount will be withheld until the final submittals, listed below, have been approved by the Government. The 10 percent retainage for final submittals will not be held until such time as the Contractor has earned 90 percent of the original contract value. See SECTION 01 78 00.00 28 "CLOSEOUT SUBMITTALS" for additional information.

a. Final Approved Versions of Contractor Prepared Drawings.

b. As-built contract drawings and FIO drawings.

c. Return of Government Issued Items.

1.2 ITEM 0001 TOP OF DAM PARKING WITH BARRIER WALL

Top of Dam Parking with Barrier Wall will be measured for payment as a complete pay item (JOB). Payment will be made at the lump sum price for Item No. 0001, "Top of Dam Parking with Barrier Wall," which price and payment shall be full compensation for all work required for construction of the Top of Dam Parking with Barrier Wall, complete, as specified and approved. Features included with this item will include, but not be limited to:

a. excavate to (1) remove the existing berm, (2) expose parking area subgrade, (3) expose leveling pad subgrade - remove excavated materials from the site (except sand and gravel needed as backfill outside barrier end walls);

b. place aggregate base to construct leveling pad and parking area aggregate base materials;

c. fine grade leveling pad and stack blocks to construct the barrier wall;

d. place riprap along upstream side of barrier wall;

e. backfill with sand and gravel to reconstruct berm outside the barrier end walls;

f. fine grade and compact parking area aggregate base;

1.3 ITEM 0002 PAVING, STRIPING, AND WHEEL STOPS, AND SAW CUTTING (OPTIONAL)

Paving, striping, and wheel stops will be measured for payment as a complete pay item (JOB). Payment will be made at the lump sum price for

SECTION 01 22 00.00 28

Item No. 0002, "Paving, striping, and wheel stops," which price and payment shall be full compensation for all work required for construction of the Paving, striping, and wheel stops, complete, as specified and approved. Features included with this item will include, but not be limited to:

a. Saw cut existing roadway pavement;

ab. place asphalt concrete to pave the parking area;

bc. stripe the parking stalls;

cd. place wheel stops;

1.4 ADDITIONAL AGGREGATE BASE MATERIAL (OPTIONAL)

Additional aggregate base material will be measured for payment as a complete pay item (JOB). Payment will be made at the lump sum price for Item No. 0003, "Additional Aggregate Base Material (Optional), ," which price and payment shall be full compensation for all work required for furnishing and placing the additional aggregate base material to construct final grade, complete, as specified and approved.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

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SECTION 01 22 00.00 28

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 12 16.00 28

ASPHALT PAVING (OPTIONAL)

PART 1 GENERAL

1.1 SCOPE OF WORK

1.2 REFERENCES

1.3 TOLERANCES

1.3.1 Completed Surface of all Asphalt Concrete Paving

1.3.2 Asphalt Concrete Surface Parallel to the Roadway

1.3.3 Asphalt Concrete Surface Perpendicular to the Roadway

1.4 SUBMITTALS

1.4.1 Nuclear Gauge Submittal

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Parking Space Markings

2.1.2 Wheel Stop

2.1.3 Tack Coat

2.1.4 Asphalt Concrete Pavement

2.1.4.1 Pavement Materials Submittals

2.2 PRODUCTION

2.2.1 Mixing Plants

2.2.2 Materials During Production

2.2.2.1 Asphalt Cement

2.2.2.2 Water Content

2.2.2.3 Temperature

2.2.2.4 Storage of Mixture

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Removing Existing Pavement

3.1.2 Preparation of Base Surfaces

3.2 CONVEYING AND PLACEMENT EQUIPMENT

3.2.1 Hauling Equipment

3.2.2 Pavers

3.2.3 Rollers

3.3 PLACING

3.3.1 General

3.3.1.1 Asphalt Concrete Mixture

3.3.1.2 Internal Temperature

3.3.2 Joints

3.3.2.1 General

3.3.2.2 Transverse Joints

3.3.3 Tack Coat

3.4 COMPACTION

3.4.1 Uniformity

SECTION 32 12 16.00 28

3.4.2 Compaction

3.4.3 Rolling

3.4.4 Prevention of Adhesion to the Rollers

3.4.5 Compaction of Asphalt Concrete

3.5 WEATHER LIMITATIONS

3.5.1 Wet or Damp Surfaces

3.5.2 Time of Placement

3.6 PROTECTION

3.7 CONTRACTOR QUALITY CONTROL

3.7.1 Construction Monitoring and Testing

3.7.2 Surface Smoothness

3.7.3 Asphalt Temperature

3.7.4 Density Tests

3.7.5 Additional Reporting

3.7.6 Repair Alternatives

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SECTION 32 12 16.00 28

SECTION 32 12 16.00 28

ASPHALT PAVING (OPTIONAL)

PART 1 GENERAL

1.1 SCOPE OF WORK

The work covered by this section shall consist of constructing an asphalt concrete pavement on a prepared surface for the parking area at McNary Dam.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D 2217 (1985; R 1998) Wet Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants

ASTM D 2397 (1998) Cationic Emulsified Asphalt

OREGON DEPARTMENT OF TRANSPORTATION (ODOT)

ODOT 2015 Oregon Standard Specifications for Construction (Volume 2 - Technical Specifications)

1.3 TOLERANCES

1.3.1 Completed Surface of all Asphalt Concrete Paving

The completed surface of all asphalt concrete paving shall be of uniform texture, smooth, closely conforming to elevation requirements shown on the contract drawings, and shall be free from defects. The final constructed elevation for the asphalt concrete pavement shall not vary more than plus-or- minus 1/4 inch from the specified elevation.

1.3.2 Asphalt Concrete Surface Parallel to the Roadway

The asphalt concrete surface parallel to the roadway centerline or to the direction of placement shall not vary more than 1/8 inch, respectively, from the lower edge of a 10-foot straightedge.

1.3.3 Asphalt Concrete Surface Perpendicular to the Roadway

The asphalt concrete surface perpendicular to the roadway centerline or to the direction of placement shall not vary more than 1/8 inch, respectively, in 10 feet from the lower edge of a 10-foot straightedge.

SECTION 32 12 16.00 28

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals having an "I" designation are for information only. A designation following the "G" or "I" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Job Mix Formula ; G, C

1.4.1 Nuclear Gauge Submittal

Use a nuclear densometer to determine the in-place density of the asphalt concrete for quality control purposes. Provide submittals for each densometer per Section 31 00 00.00 28 , Earthwork.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Parking Space Markings

Contractor shall adhere to Oregon Department of Transportation specification Section 00850 - Common Provisions for Pavement Markings and all subsequent information in specification Section 00867 - Transverse Pavement Markings for Type AB material types. Refer to drawing C-501 for parking space marking plan, spacing requirements and line thickness.

2.1.2 Wheel Stop

Refer to drawing C-502 and the notes thereupon for information about the material type, rebar type and grade of steel, and dimensions for wheel stop information. Install wheel stops per manufacture recommendations.

2.1.3 Tack Coat

Tack coat shall be a cationic emulsified asphalt meeting the requirements of ASTM D 2397 for CSS-1. The tack coat may be a mixture of CSS- 1 and water not to exceed a ratio of one to one.

2.1.4 Asphalt Concrete Pavement

Asphalt concrete pavement shall meet the requirements of Section 00744 of ODOT 2015. Provide a 1/2" ACP mix type per Section 00744.12. The job mix formula shall meet the requirements for Level 3 per Section 00744.13.

2.1.4.1 Pavement Materials Submittals

Provide a Job Mix Formula submittal with the mix design information. Show all the calculations, proportions of materials by weight, manufacturer of asphalt cement and antistripping admixture, and the source of materials.

Include laboratory test results for aggregate per Section 00744.10, including:

Aggregate soundness

Aggregate Durability

Aggregate Source

Fractured Faces

Wood Particles

Elongated Pieces

Plasticity Index

Sand Equivalent

2.2 PRODUCTION

2.2.1 Mixing Plants

All mixing plants shall be capable of producing a uniform mixture and conform to the requirements listed in State Specification.

2.2.2 Materials During Production

2.2.2.1 Asphalt Cement

Asphalt cement furnished under these specifications shall not have been distilled at a temperature high enough to injure by burning or to produce flecks of carbonaceous matter, and upon arrival at the batch site, shall show no signs of separation into lighter and heavier components as determined by the Contracting Officer. At no time shall the temperature of the asphalt cement exceed 350-degrees F. nor shall the temperature exceed 300-degrees F. at the time the asphalt cement is introduced to the aggregates.

2.2.2.2 Water Content

Water content of the aggregate shall be reduced by drying operations to less than 0.75 percent when tested in accordance with ASTM D 2217 .

2.2.2.3 Temperature

Temperature of the aggregates and mineral filler in the mixer shall not exceed 325-degrees F. when the asphalt cement is introduced. After mixing, asphalt cement shall cover a minimum of 95 percent of the aggregate's surface area.

2.2.2.4 Storage of Mixture

In no case shall the mixture be stored more than 4 hours after introduction of the asphalt cement to the aggregates.

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Removing Existing Pavement

The Contractor shall sawcut along the full length of the parking area.

The cut shall be approximately 6-inches inside the existing edge-of-pavement of the existing roadway as indicated. The cut shall be neat and vertical to provide a clean, flat, uniform surface to pave against.

3.1.2 Preparation of Base Surfaces

The Contractor shall protect the surface of the base and repair all irregularities to provide a uniform grade and cross section acceptable to and approved by the Contracting Officer prior to placement of the asphalt concrete. All costs for repair of the base to the satisfaction of the Contracting Officer shall be incidental to the cost of asphalt concrete paving.

3.2 CONVEYING AND PLACEMENT EQUIPMENT

3.2.1 Hauling Equipment

Trucks used for hauling plant mix shall have tight, clean, smooth metal beds. Each truck shall have a cover of canvas or other suitable material over the asphalt concrete when the air temperature is below 50-degrees F.

or during periods of rain.

3.2.2 Pavers

Pavers shall be self-propelled units, provided with an activated heated screed. Only screed extensions which produce a satisfactory end result equal to the rest of the screed will be allowed. The paver shall be operated at a speed consistent with the delivery of plant mix which provides for a smooth, uniform forward travel with the least number of stops.

3.2.3 Rollers

Rollers shall be of the steel wheel, vibratory, or pneumatic tire type, in good condition, capable of reversing without backlash, and shall be operated at speeds slow enough to avoid displacement of the mixture.

Rollers with steel-wheel drums shall be equipped with spray bars to distribute water. The number and weight of rollers shall be sufficient to compact the mixture as required. The use of equipment which results in excessive crushing of the aggregate will not be permitted. Rollers producing pickup, washboard, uneven compaction of the surface, or other undesirable results shall be removed from the project site.

3.3 PLACING

3.3.1 General

3.3.1.1 Asphalt Concrete Mixture

The asphalt concrete mixture shall be placed on an approved surface, spread and struck off to the grade and elevation shown in the plans.

Unless otherwise directed by the Contracting Officer or specified elsewhere in the contract documents, the compacted depth of any one course shall not exceed 0.35 foot.

3.3.1.2 Internal Temperature

The internal temperature of the mixture shall not drop more than 20-degrees F. between the hot plant and the paver not be less than 185-degrees F. on achieving density requirements in accordance with the specifications.

3.3.2 Joints

3.3.2.1 General

Joints between old and new pavements, between successive days' work, or joints that have become cold (less than 75 degrees F.) shall be made to insure continuous bond between the old and new sections of the course.

All joints shall have the same texture, smoothness, grade, and density as required for other sections of the course. Contact surfaces shall be cleaned by brushing or shall be cut back, as directed. The surface against which new material is placed shall be sprayed with a thin, uniform tack coat. Material shall be applied far enough in advance of placement of a fresh mixture to insure adequate curing. Care shall be taken to prevent damage or contamination of the sprayed surface. After placement of the tack coat, traffic shall not be permitted on the prepared surface and placement of the pavement mix shall be completed within 4 hours after the tack coat application.

3.3.2.2 Transverse Joints

The roller shall pass over the unprotected end of a strip of freshly placed material only when placing is discontinued or delivery of the mixture is interrupted to the extent that the material in place may become cold. In all cases, prior to continuing placement, the edge of previously placed pavement shall be cut back to expose an even vertical surface for full thickness of the course.

3.3.3 Tack Coat

A tack coat shall be applied in a manner that provides full coverage of the applied surface. A minimum applied rate of 0.04 gallons per square yard of retained asphalt shall be applied. The Contracting Officer will direct the application of additional tack coat if full coverage is not observed. All costs associated with tack coating shall be incidental to the cost of asphalt concrete paving.

3.4 COMPACTION

3.4.1 Uniformity

Immediately after the asphalt concrete mixture has been spread, struck off, and surface irregularities adjusted, it shall be thoroughly and uniformly compacted. The completed course shall be free from ridges, ruts, humps, depressions, objectionable marks or irregularities and in conformance with line, grade, and cross section as shown in the plans or as specified.

3.4.2 Compaction

Compaction shall take place when the mixture is in the proper condition so that no undue displacement, cracking, or shoving occurs. All compaction units shall be operated at the speed, within specification limits, that will produce the required compaction. Areas inaccessible to large compaction equipment shall be compacted by mechanical or vibratory hand compactors. Any asphalt concrete that becomes loose, broken, contaminated, shows an excess or deficiency of asphalt, or is in any way defective, shall be removed and replaced at no additional cost to the

Government with fresh hot mix which shall be immediately compacted to conform with the surrounding area.

3.4.3 Rolling

Unless otherwise directed by the Contracting Officer, rolling shall begin at the edge of the pavement and proceed longitudinally with the direction of laydown, working to the highest point of the pavement template with each pass overlapping one-half the roller width of the previous pass.

When paving in echelon or abutting a previously placed lane, the longitudinal joint should be rolled first followed by the regular rolling procedure.

3.4.4 Prevention of Adhesion to the Rollers

To prevent adhesion of the mixture to the rollers, the wheels shall be kept properly moistened with water or water mixed with very small quantities of detergent or other approved materials. Excessive moisture shall not be left on the asphalt concrete.

3.4.5 Compaction of Asphalt Concrete

The asphalt concrete pavement shall be compacted to between 91-percent and 96-percent of the laboratory density determined for the mix.

3.5 WEATHER LIMITATIONS

3.5.1 Wet or Damp Surfaces

Asphalt concrete shall not be applied to wet or damp surfaces or before any imminent storms that might damage the final results. The Contracting Officer will have the discretion as to whether the conditions are unsuitable to proceed with construction.

(1) The average surface temperature of the media to be overlayed shall be a minimum of 45-degrees F.

(2) The air temperature shall be a minimum of 50-degrees F. and be expected to be maintained or rise as work proceeds.

3.5.2 Time of Placement

Placement of the asphalt concrete shall not take place after September 30, 2017, unless authorized in writing by the Contracting Officer.

3.6 PROTECTION

Should irregularities or contamination develop in the asphalt concrete, or in materials supporting the asphalt concrete, during or after placement until the project is accepted, the Contractor shall correct the defects to meet the requirements of this specification and to the satisfaction of the Contracting Officer. Any additional materials, labor, or equipment necessary to make the repairs shall be furnished by the Contractor at no expense to the Government.

3.7 CONTRACTOR QUALITY CONTROL

The Contractor shall establish and maintain a quality control program to show compliance with contract requirements and to maintain records of his quality control operations including, but not limited to, the following tests and submittals. Unless otherwise stated in this Technical Specification, all test results for Contractor Quality Control performed prior to placement of asphalt concrete shall be reported and delivered to a designated representative of the Contracting Officer prior to beginning placement of the asphalt concrete. Unless otherwise stated in this Technical Specification, all test results for Contractor Quality Control performed during asphalt concrete placement or after placement of the concrete shall be reported and delivered within 24 hours to a designated representative of the Contracting Officer.

3.7.1 Construction Monitoring and Testing

Full-time construction monitoring and testing is required during asphalt placement and compaction. It is anticipated that the Testing Firm required per Section 31 00 00.00 28 , Earthwork, would also perform the needed construction monitoring, though this is not required. The requirements of Section 31 00 00.00 28 shall apply.

3.7.2 Surface Smoothness

The Contractor shall check surface smoothness for compliance to the specifications and make available for use by the Contracting Officer a manufactured 10-foot straight edge. Surface smoothness shall be checked in the transverse and longitudinal directions at intervals not more than 50 feet.

3.7.3 Asphalt Temperature

A probe thermometer shall be used to determine the internal temperature of the asphalt concrete. A minimum of one temperature reading shall be recorded for each required density check.

3.7.4 Density Tests

The Testing Firm shall provide construction documentation for contractor means and methods, as well as construction testing based on nuclear densometer tests. A minimum of 10 documented tests is required.

3.7.5 Additional Reporting

Upon completion of paving, the Testing Firm shall provide a statement indicating the asphalt concrete pavement was constructed in general accordance with the Project Specifications and is suitable for the anticipated loads. This statement shall be stamped by a Professional Engineer licensed in Oregon.

3.7.6 Repair Alternatives

Where construction requirements are not met such as required densities or temperature requirements, or where visible surface smoothness requirements are not met, or where irregularities, or other visible quality problems can be identified, the contractor shall sawcut and replace the pavement.

Any patches shall be at least 5-feet square and as approved. All such repairs shall be completed at no additional cost to the government.

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