00008283_Att B_Technical Specifications.pdf

CONTRACT DOCUMENTS

FOR

OREGON DEPARTMENT OF AVIATION

PAVEMENT MAINTENANCE PROJECT

PMP REGION 4 – EASTERN AIRPORTS

ATTACHMENT B – TECHNICAL SPECIFICATIONS

OWNER:

Oregon Department of Aviation

3040 25th St. SE

Salem, OR 97302

ENGINEER:

Century West Engineering

5500 Meadows Road, Suite 250

Lake Oswego, OR 97035

Phone: (971) 419-2130

June 2023

THIS PAGE INTENTIONALLY

LEFT BLANK

JUNE 2023 | #40097.121.01

Description and Table of Contents – 1 CENTURY WEST ENGINEERING CORPORATION

ODAV PAVEMENT MAINTENANCE PROGRAM

PMP REGION 4 – EASTERN AIRPORTS

PROJECT DESCRIPTION

The information contained in Attachments B and C include the technical specifications and plans for the above project. Pavement maintenance work contemplated for this project by the Oregon

Department of Aviation includes work on four (4) airports in PMP Region 4. The airports in this project include the following: Baker City, Grant County Regional, Joseph State and La Grande.

The work consists of, but is not limited to, the following:

1. Full and partial depth AC pavement patching.

2. Crack sealing in asphalt concrete pavement.

3. Runway, taxiway, and apron painting.

TABLE OF CONTENTS

ATTACHMENT B - TECHNICAL SPECIFICATIONS

01000

01115

01340

01505

FOD Prevention and Cleanup

Airport Safety

Submittals

Mobilization

P-101

P-603

P-620

Crack Sealing and AC Pavement Repair

Bituminous Tack Coat

Runway and Taxiway Marking

01000 FOD Prevention and Clean-up – 1 CENTURY WEST ENGINEERING CORPORATION

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01000 FOD PREVENTION AND CLEANUP

PART 1: GENERAL

This item shall consist of providing labor and equipment necessary to avoid the possibility for

FOD (foreign object debris) damage to aircraft resulting from engine ingestion, engine blast or any ground operation. No objects/debris of any visible size shall be allowed on an active runway, taxiway, shoulder, ramp, road and any other paved surfaces. These surfaces are to be kept clean as work progresses and are to be free of FOD as described above, before these surfaces are opened to aircraft operations.

PART 3: EXECUTION

3.1 EQUIPMENT

Equipment shall include power brooms, vacuum sweepers, and hand tools as necessary.

3.2 CONSTRUCTION METHODS

Access/haul routes will be strictly confined to the areas designated by the engineer and the airport. These routes will be confined to the smallest possible area in order to limit the amount of sweeping and clean-up required. These routes will be clearly marked by the Contractor with signs and cones as necessary to assure vehicles will not stray from the designated routes. Within airport property, vehicles will not be allowed to travel on gravel or other unpaved surfaces which could be potential sources of FOD.

The Contractor will assign a laborer to inspect each vehicle entering the airport construction zone for loose material on the vehicle’s exterior or tires and then remove the material before the vehicle proceeds to the work area. To prevent material from falling from the trucks while in transit, loads filled to the top of the side rails will not be allowed on the site.

The Contractor will return all aircraft movement areas to a clean, FOD free state before re-opening those surfaces to aircraft traffic. FOD clean up equipment and methods used by the Contractor will be subject to approval by the Engineer and/or Airport Staff.

Equipment judged to be unsuitable by the Engineer will be replaced by the Contractor.

No steel bristled brooms will be allowed.

Compliance with the runway closure schedule is critical. To this end, the Contractor will be required to immediately respond to cleanup-equipment breakdowns by having operational equipment on call in case of equipment breakdown.

01000 FOD Prevention and Clean-up – 2 CENTURY WEST ENGINEERING CORPORATION

PART 4: MEASUREMENT AND PAYMENT

4.1 Work in accordance with this section shall be incidental to other items and separate payment shall not be made.

END OF SECTION 01000

01115 Airport Safety & Operations – 1 CENTURY WEST ENGINEERING CORPORATION

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01115 AIRPORT SAFETY & OPERATIONS

1.1 SCOPE

This specification outlines safety procedures and regulations to be followed by the

Contractor during the course of this Work. This work shall consist of furnishing, installing, and removing temporary marking, signing, lighting, closing crosses and barricades required during the course of this Work. It shall also include furnishing sufficient flaggers for traffic control, traffic control coordination using Unicom compatible radios, and

NOTAM coordination. All Work shall be in conformance with the "Manual on Uniform

Traffic Control Devices" and FAA AC 150/5370-2G, “Operational Safety on Airports During

Construction.”

1.2 GENERAL SAFETY REQUIREMENTS

During performance of this Contract, the airport runways, taxiways, and aircraft parking aprons shall remain in use by aircraft to the maximum extent possible, CONSISTENT WITH

CONTINUAL SAFETY. The Contractor shall not allow employees, subcontractors, suppliers, or any other unauthorized person to enter or remain in any airport area, which would be hazardous to persons or to aircraft operations.

Closures of Work areas on aprons, taxiways, and runways shall be allowed to complete the construction Work. The closure area shall be limited to the area required for the construction Work (the work zone), in addition to adjacent areas that need to be closed for safety requirements of these specifications and safety considerations identified on-site. The Contractor shall phase Work in such a way to keep the airport facilities open to the greatest extent possible. Runways and taxiways shall not be closed without approval of the Engineer and the Airport Manager, nor shall access to the airport terminal, Fixed

Base Operator (FBO), or fuel facilities be restricted over a weekend or prior to and during special exclusion dates as listed in the plans or as identified by airport owners.

Closures of Work areas on aprons, taxiways, and runways shall not be allowed without the Engineer present on the site, unless specifically approved otherwise by the Engineer.

1.3 CONTRACTOR’S RESPONSIBILITY FOR CONSTRUCTION AND FACILITIES

MAINTENANCE

A. Be aware of the types of safety and operation issues identified in FAA AC

150/5370-2G, “Operational Safety on Airports During Construction”.

01115 Airport Safety & Operations – 2 CENTURY WEST ENGINEERING CORPORATION

B. Inspect all Contractor Work, construction, and storage areas as often as necessary to be aware of conditions, and

C. Promptly take all steps needed to prevent/remedy any unsafe or potentially unsafe conditions/activities discovered.

D. The Contractor shall notify the Engineer a mandatory minimum of three (3) calendar days in advance of Work that requires the closure of a taxiway, apron, or other safety measure, and seven (7) calendar days in advance of Work that requires a runway closure, so the Engineer can coordinate the closure or other safety measure with the airport representative including reasonable notification of tenants located at the airports. The airport representative shall issue a Notice to Air Mission (NOTAM) to alert pilots of the closure or other safety measure.

E. The Contractor shall coordinate the construction schedule around special event periods and exclusion dates as listed in the plans or as identified by airport owners.

The Contractor shall, prior to determining the construction schedule, verify special events or exclusion dates and schedule around them. Runway, taxiway, and apron closures shall not be allowed during the special event periods or exclusion dates and as much as 24 hours before and after.

F. Government agencies may require the exclusive use of an airport(s) during forest fire season. They shall receive priority when coordinating the schedule for runway and taxiway closures during firefighting operations.

H. Under unusual conditions, including but not limited to medical or emergency flights, the Engineer, or Airport Manager may order the Contractor to temporarily suspend operations, move personnel, equipment, and/or materials, and stand by at a safe location during takeoff or landing of aircraft.

I. Upon completion of Work and return of all such areas to standard conditions including FOD removal as described in Specification 01000, Contractor shall notify

Engineer who in turn shall notify the airport representative who is authorized to issue a NOTAM, indicating taxiway or runway is open for normal use.

1.4 AIRPORT SECURITY

During the course of the Contract, the Contractor shall be responsible for maintaining security against unauthorized access to the airport. The Contractor shall be held responsible for any fines, damages or civil penalties filed against the Owner for the

Contractor's failure to maintain the regulations set forth herein.

01115 Airport Safety & Operations – 3 CENTURY WEST ENGINEERING CORPORATION

The Contractor shall be fully responsible for compliance by its employees with the security program of each airport following the regulations and orders of the airport management.

These regulations may affect identification of employees, movement around the airport, parking, entry, and other circumstances affecting the safety or protection of persons or property.

For the purpose and intent of these regulations, air operations area is construed to mean any area used or intended to be used for take-offs, landing, or surface maneuvering of aircraft, and all other areas restricted to public access on the field. Only Contractor's employees are permitted in the work sites.

The Contractor must enter and exit the air operations area only via routes approved by the Engineer and the airport representative.

Within the air operations area, all equipment, vehicle, and personnel travel shall be restricted to designated work sites.

Only vehicles used for construction purposes shall enter the air operations area.

Contractor personnel shall park their personal vehicles within a designated staging area outside the air operations area.

In the event of an emergency, all persons and equipment shall move immediately to the staging area, as designated by the Engineer.

PART 2: PRODUCTS

2.1 FLAGGING

A qualified superintendent shall control construction traffic across active runways or taxiways. The superintendent shall be a qualified flagger as required in Oregon Standard

Specifications for Construction 2021, Section 00223 prior to assuming their duties.

Vehicle traffic is permitted across active runways or taxiways only when the superintendent is in position to monitor aircraft traffic and control construction traffic.

2.2 BARRICADES

Temporary barricades shall be placed around perimeters of construction areas that border areas of aircraft traffic, or around any area which may present a hazard to aircraft.

The barricades shall be new (or like new) 28-inch high plastic reflectorized tubular markers as specified by the current Manual on Uniform Traffic Control Devices published by the U.S. Department of Transportation. Each marker shall have an 18-pound base.

Space markers 10’ (max.) apart. Flashing red lights shall be placed next to every third

01115 Airport Safety & Operations – 4 CENTURY WEST ENGINEERING CORPORATION plastic tubular marker during night-time hours. The lights shall be battery powered, at

12¼” total height on a 3½” x 7 3/8” base.

2.3 TEMPORARY MARKING AND SIGNING

The Contractor shall install temporary closing crosses, signs, lights, traffic control devices and other temporary markings required during the course of this Contract. The temporary markings shall conform to applicable Federal Aviation Administration markings and shall be constructed of materials approved by the Engineer.

Two sets of two temporary closed runway markings (crosses or closing X’s) as described below shall be provided by the Contractor (4 crosses total). Oregon Department of

Aviation in Salem may provide two additional sets of temporary closed runway markings as needed. Closure crosses shall be placed, maintained, and removed by the Contractor as required by the Work and as directed by the Engineer during the Contract.

Coordinate availability with other construction projects at each airport, if applicable.

Each cross to be provided by the contractor shall be made of yellow truck tarp nylon weighing 18 ounces per square yard. The edges shall be hemmed, corners reinforced, and grommets provided every 3 feet along the edge. Material for each set of crosses shall be sized as follows: 4 pieces (10’ x 60’) as shown in the plans. The crosses shall be secured on airfield pavements by sandbags or other approved methods. On in-field areas, the crosses may be nailed down.

When a runway requires closure for an overnight period, the Contractor may be required to place and maintain lighted closure crosses. These closure crosses will be made available to the contractor by the Oregon Department of Aviation, from their Salem office, if required.

PART 3: EXECUTION

3.1 CONSTRUCTION / MAINTENANCE IN PROXIMITY TO RUNWAYS

A. GENERAL

Work activity may not commence prior to issuance of a NOTAM. The Contractor shall advise the Engineer in advance of the planned commencement of Work activity on a runway, as specified in Section 1.3E, so a NOTAM can be issued and shall not commence such activity until advised by the Engineer. Upon completion of Work to the satisfaction of the Engineer, the NOTAM shall be canceled as specified in Section 1.3I.

01115 Airport Safety & Operations – 5 CENTURY WEST ENGINEERING CORPORATION

B. RUNWAY SIDES

If a NOTAM has been issued, construction (using equipment under 15 feet tall) is permissible outside the Runway Object Free Area as designated by the ‘hold line’ pavement marking on each connection to the runway, or 125’ from runway centerline, whichever is greater.

Work activities inside the runway safety area or using equipment taller than 15 feet are prohibited unless the activities are formally found unobjectionable to airport airspace by the FAA.

C. RUNWAY ENDS

If a NOTAM has been issued, Work activity is permissible off the ends of the runway provided at least the indicated minimum safety area and indicated unobstructed approach slope are maintained:

Minimum Safety Area

Behind Threshold

Minimum Unobstructed

Approach Slope

300 Feet

34:1 to 200' behind threshold

Work activities which reduce the available behind-threshold safety area below

300 feet, or which would penetrate or be above the indicated minimum unobstructed approach slope are prohibited unless temporarily displaced threshold markings are placed and the activities have been approved by the

Engineer.

3.2 BARRICADES AND CLOSURES

A. Closed runway markings are required for all full and partial closures. The markings shall be placed as shown on the plans or as directed by the Engineer.

B. Barricades, flagging, and flashers shall be installed around all work areas. Hazard markings and lighting shall be located as shown on the plans and in these specifications.

C. The contractor is required to have staff on call 24 hours a day for emergency maintenance of airport hazard lighting and barricades.

3.3 VEHICLE IDENTIFICATION AND PARKING

01115 Airport Safety & Operations – 6 CENTURY WEST ENGINEERING CORPORATION

A. Contractor vehicles and equipment shall be identified by painted or magnetic signing identifying the Contractor's company. During daytime operations, each vehicle operating on the airport operations area (AOA) shall have either an omni-directional amber flashing light or an FAA-approved orange and white checkered flag. The flag shall be at least three-foot square having a checkered pattern of international orange and white squares at least one foot on each side. During night operations, ALL vehicles entering the AOA shall be equipped with amber flashing light mounted on the roof of the cab. Headlights, taillights and flashers shall be used for ALL activities during night hours.

B. Employee parking shall be outside the AOA as directed by the Engineer.

3.4 CONSTRUCTION SITE ACCESS AND HAUL ROADS

Access to the job site shall be as shown on the plans or as directed by the Engineer.

3.5 RADIO COMMUNICATIONS

It is required that the Contractor monitor the Unicom Frequency while working on the airfield to avoid conflicts between airplanes and construction activities on the airfield.

The Contractor shall provide a qualified superintendent at each airport while on-site, as required in Supplemental General Conditions, who shall monitor and communicate with pilots using handheld radios to the satisfaction of the Engineer and or the airport representative. No work may commence on work inside the AOA at any airport unless a qualified superintendent is present.

The Contractor shall monitor the Unicom Frequency, advise the FBO about work activities, and advise traffic when necessary. Particular attention must be paid to work activities on runways at intersections with runways. Contractor personnel assigned to monitor and communicate using handheld radio units shall not be engaged in any work activities, such as routing or operating a compressor that might reduce their ability to hear incoming radio transmissions.

The Unicom Frequency at each of the facilities is listed on the plans and can be obtained from the airport representative or the Engineer.

Two radios shall be provided by the Contractor and used on the project during the

Contract. They shall be able to monitor, transmit, and receive using the Unicom

Frequency for airports. The radios shall be handheld radios manufactured by Icom, Model

IC-A16, or approved equal equipped with an extra battery and sufficient charging equipment for each.

01115 Airport Safety & Operations – 7 CENTURY WEST ENGINEERING CORPORATION

When work occurring on multiple airports requires use of more radios than required above, additional radio equipment may be made available to the contractor by the owner.

3.6 TRAINING REQUIREMENTS

The Contractor’s Superintendent, Foreman, motorized vehicle operators and Flaggers shall be trained by the Engineer on airport procedures and radio communications prior to issuance of Notice to Proceed. Required airport-specific training sessions shall include

General Aviation Airport Training, Safety During Construction Training, and Aviation Radio

Training. All Contractor personnel who will be present on the airport during construction are strongly encouraged to attend training sessions as well. Contractor and subcontractor employees required to attend training sessions will be required to pass an airport and radio test administered by the Engineer.

All additional airport owner required training shall be completed to the satisfaction of the airport owner prior to entering that airfield.

3.7 NIGHT WORK LIMITATIONS

No work may be performed between civil twilight and civil twilight (during night-time hours) unless prior approval has been given by the Engineer or as listed in the plans. Any work performed during these hours is limited to areas properly illuminated by temporary light plants. Unless otherwise directed by the Engineer, light plants shall be portable and trailer mounted with a minimum of (4) 1000W lamps per tower. Vehicle headlights, headlamps, or handheld lighting will not be accepted as proper illumination for night work.

3.8 STOCKPILED MATERIAL

Extensive stockpiled materials should not be permitted within the construction activity areas defined in the preceding sections.

Stockpiled material should be constrained in a manner to prevent movement resulting from aircraft blast or wind. Material should not be stored near aircraft turning or movement areas.

PART 4: MEASUREMENT AND PAYMENT

4.1 Temporary flagging, marking and signing shall be included in the payment for Mobilization paid for at the Contract lump sum price for each airport as stated in the Contract

Documents. This price shall be full compensation for furnishing flaggers, barricades, lights, temporary closed runway markings, relocated threshold markings, temporary crosses (closing X’s), pavement marking and lighting and other temporary markings and for maintenance of those items during the Work, any necessary relocations, radio

01115 Airport Safety & Operations – 8 CENTURY WEST ENGINEERING CORPORATION equipment, and for all labor, equipment, tools and incidentals necessary to complete the item.

END OF SECTION 01115

01340 Submittals – 1 CENTURY WEST ENGINEERING CORPORATION

SECTION 01340 SUBMITTALS

In addition to requirements in each Section of the Specifications, Contractor shall comply with the following listed herein.

1.2 SUBMITTALS

Contractor shall provide submittals in accordance with General Conditions and be transmitted to the Engineer electronically in PDF form. Submittals shall occur sufficiently in advance of the work in accordance with prearranged schedule to cause no delay in the

Contractor's Work and to afford ample time for consideration, checking, correcting and re-checking. Show complete details of construction and methods of installation including sizes, dimensions, types of materials, material specifications, and other pertinent items listed in the specifications or shown on the plans. All submittals shall include cover pages indicating the bid item the submitted item is intended for use in.

1.3 SUBMITTALS

Submit for work in the following specification sections:

Section P-101

Section P-620

2.1

2.2

2.3

2.4

2.6

2.1, 3.6

2.2

2.3

Asphalt Crack Filler Material

Tack Coat

AC Mix Designs

Aggregate Base Certifications

Herbicide

Certifications

Painting Materials

Reflective Media

END OF SECTION 01340

01505 Mobilization – 1 CENTURY WEST ENGINEERING CORPORATION

SECTION 01505 MOBILIZATION

Mobilization and demobilization shall consist of preparatory work and operations, including but not limited to, those necessary for the movement of personnel, equipment, supplies and incidentals to the project site; for the establishment of offices, buildings and other facilities necessary for work on the project; for temporary flagging, marking, and signing; for premiums on bond and insurance for the project and for other work and operations which the Contractor must perform or costs it must incur before beginning work on the project.

PART 2: MEASUREMENT AND PAYMENT

2.1 LUMP SUM BASIS

Please refer to the Supplemental General Conditions.

END OF SECTION 01505

P-101 Crack Sealing and AC Pavement Repair –

CENTURY WEST ENGINEERING CORPORATION

Item P-101 Crack Sealing and AC Pavement Repair

DESCRIPTION

101-1.1 This item shall consist of routing, cleaning and filling cracks and repairing pavement distresses in existing asphaltic concrete surfaces. The work shall be accomplished in accordance with these specifications and the applicable drawings.

MATERIALS

101-2.1 Filler Material. The filler material for the item “Crack Sealing” shall be a free flowing, self-leveling hot applied asphalt-based crack seal product meeting the requirements of ASTM

D6690, Type II. The contractor shall submit a manufacturer’s certification of compliance with this standard and the product’s suitability for use in the pavement temperature ranges typical for the installation site.

101-2.2 Tack Coat. Tack coat for the preparation of pavement edges prior to paving shall meet the requirements of Specification P-603.

101-2.3 Asphalt Concrete Pavement. The asphalt concrete material used to replace areas of excavated pavement shall conform to the requirements of Oregon Standard Specifications for

Construction 2021, Section 00744.10 to .14, for Level 3, ½” ACP. The Contractor shall submit a mix design developed in accordance with the Oregon Standard Specifications for Construction

2021, Section 00744.13 for each ACP plant intended for use on the project. Each mix design to be submitted shall be reviewed and approved by ODOT within the 12-month period prior to the submittal date.

101-2.4 Aggregate Base. The aggregate base material used to replace areas of excavated pavement shall conform to the requirements of the Oregon Standard Specifications for

Construction 2021, Section 02630.10 for ¾”-0 dense graded aggregate. The contractor shall submit qualification information for all sources and stockpiles intended for use on the project.

101-2.5 Geotextile Fabric. Where required, Geotextile fabric shall conform to the requirements of the Oregon Standard Specifications for Construction 2021, Section 02320 for a Woven

Subgrade Geotextile.

101-2.6 Herbicide. Herbicide spray to kill the weeds prior to cleaning the cracks shall be Round-up or approved equal. In those areas where weeds are removed, a liquid pre-emergent herbicide such as Surflan or approved equal, shall be applied to prevent the re-growth of weeds. Apply herbicides in strict compliance with State and Federal laws. The contractor shall follow all manufacturers’ instructions for mixing, handling and application and shall use all necessary personal protective equipment to reduce applicator exposure. Herbicide shall be considered incidental to crack sealing work.

101-2.7 Equipment. All methods employed in performing the work and all equipment, tools, and machinery used for handling the material and executing any part of the work shall be subject to the approval of the Engineer before the work is started, and whenever unsatisfactory, they shall be changed or improved as required. Sealant applicator shall have a manual valve or check valve located within 12 inches of tip. Valves shall be in satisfactory working condition and not leak. All equipment, tools, machinery and containers must be kept clean and maintained in satisfactory condition.

CONSTRUCTION

101-3.1 Preparation of Cracks in Flexible Pavement.

101-3.1.1 Vegetation removal. If vegetation is present, treat the specific area with a concentrated solution of a water-based herbicide per Section 101-2.6. Allow a waiting period for the herbicide to work in accordance with the manufacturer’s recommendations. Remove all vegetation, root material and debris from cracks.

101-3.1.2 Cracks to be routed. Existing cracks (either previously sealed or unsealed) identified by the Engineer for routing shall be routed to a minimum depth of 3/8 inch and a maximum depth of ½ inch. Notify the engineer immediately if routing operations cause excessive raveling at the edge of the crack.

101-3.1.3 Existing cracks. Cracks that are to be resealed shall be prepared for sealing using a heat lance to liquefy the existing material to the satisfaction of the Engineer and remove any loose sealant from the cracks.

101-3.1.4 Cleaning of cracks. Cleaning shall be accomplished using a heat lance, compressed air, or similar method to loosen and blow loose, foreign, or objectionable material from the crack. Backpack blowers or handheld blowers shall not be used for final cleaning of cracks.

After the cracks are cleaned, the entire paved surface shall be cleaned of foreign material. Care shall be taken not to refill cracks with any foreign material.

101-3.1.5 Filling cracks. Flush fill all cracks with an approved crack sealing material. If any sinkage or settlement occurs in the rubberized asphalt sealant, the cracks shall be refilled until they are no lower than 1/8 inch below, or flush with, the surrounding surface.

Any excess buildup of filler material will not be permitted. Use of applicator disks or any other method that results in over-banding such as “Band-aiding” or capping of the crack to be sealed will not be permitted. Use of squeegees or other sealing shoes shall be required whenever any excess material is present along a sealed crack. Sealant drips shall be controlled by use of a drip stopper device at the tip of the sealant applicator wand. Any spillage or loose material shall be immediately removed from the pavement surface.

When cracks in an area have been sealed and the area must be opened to traffic prior to full cooling of sealant materials, a barrier material may be used. A biodegradable water based liquid surface detackifier may be used to remove tackiness and prevent tracking of crack sealants subject to approval by the engineer.

101-3.1.6 Wide cracks. Cracks larger than 1 ½” in width or with secondary distresses may be identified by the engineer in the field to receive AC Patching – Joint Repairs. These repairs, where called for in the plans, are 12-24” in width and are intended to remove and replace the asphalt as well as aggregate base affected by intrusion of water into the crack. These wide cracks shall be repaired per the AC Patching – Joint Repair details shown in the plans and according to requirements specification section 101-3.2.

101-3.2 Asphaltic concrete pavement repair. Asphalt concrete repair areas shown on the plans are for estimating purposes only and will be marked out by the Engineer prior to work.

Materials and methods of construction shall comply with other applicable sections of this specification.

101-3.2.1 Asphaltic concrete pavement removal. Asphalt concrete pavement to be removed shall be sawcut to the full depth of the bituminous material around the perimeter of the area to be removed. Excavate all surface course, base course, subbase, and subgrade to a minimum depth of 6 inches below the existing subgrade depth unless otherwise shown on the plans or directed by the Engineer. The contractor shall avoid excessive disturbance of subgrade below the limits of excavation to reduce the need for additional subgrade compaction.

For AC Patching-Joint Repairs, the contractor may cold mill the full depth of existing asphalt concrete pavement in lieu of sawcutting. Milling shall be performed with a power-operated milling machine capable of cutting a vertical edge without chipping, spalling the edges of, or otherwise disturbing the surrounding pavement. The milling machine shall also have a positive method of controlling the depth of cut.

All excavated materials shall be disposed of off Airport property, unless otherwise specified or specifically approved by the engineer and the Airport. If the Contractor mills, grinds, or otherwise disturbs pavement outside the areas indicated for repair, the Contractor shall replace the material that was removed or disturbed with new material at no additional cost to the owner.

101-3.2.2 Subgrade preparation. Rolling and compaction of subgrade to remain shall be minimized to reduce risk of pumping or otherwise compromising existing subgrade strength.

When necessary, the contractor shall use smooth drum rollers and plate compaction equipment to reduce additional disturbance.

Compact the subgrade to a minimum depth of 4” and a density not less than 95 percent of the theoretical maximum density as determined by ASTM D 698. The material to be compacted shall be within ±2% of optimum moisture content before being rolled to obtain the prescribed compaction (except for expansive soils). The in-place field density shall be determined in accordance with ASTM D6938 using Procedure A, the direct transmission method, and ASTM

D6938 shall be used to determine the moisture content of the material. The machine shall be calibrated in accordance with ASTM D6938.

For areas where the subgrade material is not able to be tested or where large/variable subgrade materials are present, compacted subgrade in accordance with Oregon Standard

Specifications for Construction 2021, Section 00330.43.(c) for Non-Moisture-Density Testable

Materials. These areas shall be tested in accordance with ODOT TM 158. In areas where a loaded haul vehicle is not able to access subgrade, a suitable equivalent vehicle or piece of equipment acceptable to the engineer may be substituted. Soft areas of subgrade that deflect more than 1 inch or show permanent deformation greater than 1 inch shall be removed and replaced with suitable material or reworked to conform to the moisture content and compaction requirements in accordance with these specifications.

101-3.2.3 Aggregate base installation. All aggregate base shall be placed in equal depth layers with a maximum layer depth of 6 inches. Any areas identified where aggregates have become segregated and do not meet gradation requirements will be removed and replaced by the contractor with additional aggregate base material. Add water to the aggregate base to maintain moisture content to achieve required compaction and in accordance with Oregon

Standard Specifications for Construction 2021, Section 00641.41. Place and compact each layer to the requirements of the Oregon Standard Specifications for Construction 2021, Section

00641.44.

When aggregate base materials are not able to be tested, place and compact the material as follows. The compacted aggregate base shall be tested in accordance with ODOT TM 158. In areas where a loaded haul vehicle is not able to access the base course to be tested, a suitable equivalent vehicle or piece of equipment acceptable to the engineer may be substituted.

For areas where existing aggregate base material is to remain, re-compact the existing base and add additional aggregate base as shown on the plans and in accordance with this specification section.

101-3.2.4 Asphalt concrete paving. Thoroughly clean and tack asphalt match points. Match the depth of pavement shown on the plans for each airport but no less than 3 inches to bring the new surface flush with the surrounding pavements. Place bituminous material in multiple lifts when required thickness exceeds 4 inches. Place bituminous material in accordance with the Oregon Standard Specifications for Construction 2021, Section 00744.40-.44.

Each lift shall be thoroughly compacted in accordance with the Oregon Standard Specifications for Construction 2021, Section 00744.49 and to the satisfaction of the Engineer. Equipment used for compaction shall meet the requirements of the Oregon Standard Specifications for

Construction 2021, Section 00744.24.

Any mixture that becomes loose and broken, segregated, mixed with dirt, or is in any way defective shall be removed and replaced at the Contractor’s expense and in accordance with the Oregon Standard Specifications for Construction 2021, Section 00744.60. All edges of the repair shall be sealed with crack seal filler material as described in Section 3.1.5, above. Excess filler shall be firmly squeegeed down to the surface of surrounding pavement to eliminate excess sealant buildup.

Asphalt concrete patches whose dimensions exceed ten feet in both width and length will require placement of bituminous material to be accomplished using a paving machine meeting the requirements of the Oregon Standard Specifications for Construction 2021, Section 00744.23.

Pavers shall be self-propelled with an activated, heated screed, capable of spreading and finishing courses of bituminous material that will meet the specified thickness, smoothness, and grade.

The paver shall have sufficient power to propel itself and the hauling equipment without adversely affecting the finished surface. The paver shall have a receiving hopper of sufficient capacity to permit a uniform spreading operation. The hopper shall be equipped with a distribution system to place the asphalt concrete uniformly in front of the screed without segregation. The screed shall effectively produce a finished surface of the required evenness and texture without tearing, shoving, or gouging the mixture. The paver shall be equipped with a control system capable of automatically maintaining the required screed slope and elevation by working in conjunction with a ski-type device, string (or wire) grade line or laser control.

All paving and finishing equipment to be used for this work shall comply with Oregon Standard

Specifications for Construction 2021, Section 00744.23 and .24 and shall be approved by the

Engineer prior to beginning work.

101-3.2.5 Asphalt concrete acceptance. Finished pavement surfaces in the repair area shall not vary from the grade of the surrounding pavement by more than 1/4 inch when measured with a

12-foot straight edge and shall have positive drainage in all directions with no ponding or roller marks. For narrow patches and areas where a 12-foot straight edge does not accurately represent surrounding grades, the Contractor may request use of a 4-foot straight edge. The

Contractor shall supply all necessary straight edges.

101-3.3 Maintenance. The Contractor shall perform all maintenance work and take all precautions necessary to keep the pavement in a satisfactory condition until the full section is complete and accepted by the Engineer. The surface shall be kept clean and free from foreign material. The pavement shall be properly drained at all times. Existing pavement section layers must be protected from damage by construction operations. If cleaning is necessary or if the pavement becomes disturbed, any additional work or repairs necessary shall be performed at the Contractor’s expense.

101-3.4 Weather Limitations. Asphalt concrete and all crack filler materials may be installed when either the atmospheric or pavement surface temperature is 45 degrees F and rising.

Application or installation of these materials shall be suspended when either atmospheric or pavement surface temperature is 45 degrees F and falling. When either atmospheric or pavement surface temperature is 55 degrees F or less at the time of placement/application, the contractor shall provide an acceptable temperature reference for review by the Engineer.

METHOD OF MEASUREMENT

101-4.1 Crack Sealing. The unit of measurement for Crack Sealing shall be the linear feet of cracks cleaned, filled, and repaired as specified.

101-4.2 AC Patching. The unit of measurement for Asphalt Concrete Patching shall be the number of square feet of the actual area of repairs which have been completed and accepted by the engineer.

101-4.3 AC Patching – Joint Repair. The unit of measurement for Asphalt Concrete Patching –

Joint Repair shall be the number of linear feet of the actual repairs which have been completed and accepted by the engineer.

BASIS OF PAYMENT

101-5.1 Payment. Payment shall be made at contract unit price for the unit of measurement as specified above. This price shall be full compensation for furnishing all materials and for all preparation, hauling, and placing of the material and for all labor, equipment, tools, and incidentals necessary to complete this item.

Item P 101-5.1 Crack Sealing

Item P 101-5.2 AC Patching

Item P 101-5.3 AC Patching – Joint Repair

MATERIAL REQUIREMENTS

ODOT TM 158 In- Place Density of Embankment and Base using Deflection

Requirements

ASTM D 698 Standard Test Methods for Laboratory Compaction Characteristics of Soil

Using Standard Effort

ASTM D6938 Standard Test Methods for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)

ASTM D6690 Standard Specification for Joint and Crack Sealants, Hot Applied, For

Concrete and Asphalt Pavements

END OF ITEM P-101

P-603 Bituminous Tack Coat – 1 CENTURY WEST ENGINEERING CORPORATION

Item P-603 Bituminous Tack Coat

603-1.1 This item shall consist of preparing and treating a bituminous surface or edge with bituminous material in accordance with these specifications and in reasonably close conformity to the lines shown on the plans.

MATERIALS

603-2.1 Bituminous materials. The bituminous material shall be an emulsified asphalt indicated in ASTM D3628 as a bituminous application for tack coat meeting the requirements of the

Oregon Standard Specifications for Construction 2021, Section 00730.

CONSTRUCTION METHODS

603-3.1 Weather limitations. The tack coat shall be applied only when the existing surface is dry and the atmospheric temperature is 50°F (10°C) or above; the temperature has not been below 35°F (2°C) for the 12 hours prior to application; and when the weather is not foggy or rainy. The temperature requirements may be waived when directed by the Engineer.

603-3.2 Equipment. The Contractor shall provide equipment for heating and applying the bituminous material.

Provide a distributor with pneumatic tires of such size and number that the load produced on the base surface does not exceed 65.0 psi (4.5 kg/sq cm) of tire width to prevent rutting, shoving or otherwise damaging the base, surface or other layers in the pavement structure.

Design and equip the distributor to spray the bituminous material in a uniform coverage at the specified temperature, at readily determined and controlled rates from 0.05 to 2.0 gallons per square yard (0.23 to 9.05 L/square meter), with a pressure range of 25 to 75 psi (172.4 to 517.1 kPa) and with an allowable variation from the specified rate of not more than ±5%, and at variable widths. Include with the distributor equipment a separate power unit for the bitumen pump, full-circulation spray bars, tachometer, pressure gauges, volume-measuring devices, adequate heaters for heating of materials to the proper application temperature, a thermometer for reading the temperature of tank contents, and a hand hose attachment suitable for applying bituminous material manually to areas inaccessible to the distributor.

Equip the distributor to circulate and agitate the bituminous material during the heating process. If the distributor is not equipped with an operable quick shutoff valve, the tack operations shall be started and stopped on building paper. The Contractor shall remove blotting sand prior to asphalt concrete lay down operations at no additional expense to the Owner.

A power broom and/or power blower suitable for cleaning the surfaces to which the bituminous tack coat is to be applied shall be provided.

P-603 Bituminous Tack Coat – 2 CENTURY WEST ENGINEERING CORPORATION

603-3.3 Application of bituminous material. Immediately before applying the tack coat, the full width of surface to be treated shall be swept with a power broom and/or power blower to remove all loose dirt and other objectionable material.

Emulsified asphalt shall be diluted by the addition of water when directed by the Engineer and shall be applied a sufficient time in advance of the paver to ensure that all water has evaporated before the overlying mixture is placed on the tacked surface.

The bituminous material including vehicle shall be uniformly applied with a bituminous distributor at the rate of 0.05 to 0.10 gallons per square yard (0.20 to 0.50 liters per square meter) depending on the condition of the existing surface. The type of bituminous material and application rate shall be approved by the Engineer prior to application.

After application of the tack coat, the surface shall be allowed to cure without being disturbed for the period of time necessary to permit drying and setting of the tack coat. This period shall be determined by the Engineer. The Contractor shall protect the tack coat and maintain the surface until the next course has been placed.

603-3.4 Bituminous material Contractor’s responsibility. The Contractor shall provide a statement of source and character of the proposed bituminous material which must be submitted and approved by the Engineer before any shipment of bituminous materials to the project.

The Contractor shall furnish the vendor’s certified test reports for each carload, or equivalent, of bituminous material shipped to the project. The engineer may use the local state DOT agency supplier certification program for approval instead of the test reports. The tests reports shall be provided to and approved by the Engineer before the bituminous material is applied. If the bituminous material does not meet the specifications, it shall be replaced at the Contractor’s expense. Furnishing the vendor’s certified test report for the bituminous material shall not be interpreted as a basis for final acceptance. Samples may be taken and tested for verification by the engineer when material is delivered to the site.

603-3.5 Freight and weigh bills The Contractor shall submit waybills and delivery tickets, during progress of the work. Before the final statement is allowed, file with the Engineer certified waybills and certified delivery tickets for all bituminous materials used in the construction of the pavement covered by the contract.

METHOD OF MEASUREMENT

603-4.1 The bituminous material for tack coat shall be considered incidental to other work items. Water added to emulsified asphalt will not be measured for payment.

P-603 Bituminous Tack Coat – 3 CENTURY WEST ENGINEERING CORPORATION

BASIS OF PAYMENT

603.5-1 Separate payment shall not be made for this item. This shall be full compensation for furnishing all materials, for all preparation, delivery, and application of these materials, and for all labor, equipment, tools, and incidentals necessary to complete the item.

MATERIAL REQUIREMENTS

ASTM D633 Standard Volume Correction Table for Road Tar

ASTM D977 Standard Specification for Emulsified Asphalt

ASTM D1250 Standard Guide for Use of the Petroleum Measurement Tables

ASTM D2028 Standard Specification for Cutback Asphalt (Rapid-Curing Type)

ASTM D2397 Standard Specification for Cationic Emulsified Asphalt

ASTM D3628 Standard Practice for Selection and Use of Emulsified Asphalts

END ITEM P-603

P-620 Runway and Taxiway Marking – 1 CENTURY WEST ENGINEERING CORPORATION

Item P-620 Runway and Taxiway Marking

620-1.1 This item shall consist of the preparation and painting of numbers, markings, and stripes on the surface of runways, taxiways, and aprons, in accordance with these specifications and at the locations shown on the plans, or as directed by the Engineer. The terms “paint” and

“marking material” as well as “painting” and “application of markings” are interchangeable throughout this specification.

MATERIALS

620-2.1 Materials acceptance. The Contractor shall furnish manufacturer’s certified test reports for materials shipped to the project. The certified test reports shall include a statement that the materials meet the specification requirements. The reports can be used for material acceptance or the Engineer may perform verification testing. The reports shall not be interpreted as a basis for payment. The Contractor shall notify the Engineer upon arrival of a shipment of materials to the site. All material shall arrive in sealed containers 55 gallons or smaller for inspection by the Engineer. Material shall not be loaded into the equipment until inspected by the Engineer.

620-2.2 Marking materials. Paint shall be waterborne in accordance with the requirements of paragraph 620-2.2.a. Paint shall be furnished in White – 37925, Red – 31136, Yellow - 33538 or

33655, Black – 37038, or Pink - 1 part Red - 31136 to 2 parts White – 37925, as shown on the plans, in accordance with Federal Standard No. 595. Submit manufacturer’s application guidelines and/or requirements for review and approval by the Engineer.

a. Waterborne. Paint shall meet the requirements of Federal Specification TT-P-1952F, Type I. The non-volatile portion of the vehicle for all paint types shall be composed of a

100% acrylic polymer as determined by infrared spectral analysis.

620-2.3 Reflective media. Glass beads shall meet the requirements for Federal Specification TT-

B-1325D, Type I, gradation A or Type III. Glass beads shall be treated with all compatible coupling agents recommended by the manufacturers of the paint and reflective media to ensure adhesion and embedment.

CONSTRUCTION METHODS

620-3.1 Weather limitations. The painting shall be performed only when the surface is dry and when the surface temperature is at least 45°F (7°C) and rising and the pavement surface temperature is at least 5°F (2.7°C) above the dew point or meets the manufacturer’s recommendations. Markings shall not be applied when the pavement temperature is greater than 130°F (55°C). When pavement surface temperature is 55 degrees F or less at the time of application, the contractor shall provide an acceptable temperature reference for review by the

P-620 Runway and Taxiway Marking – 2 CENTURY WEST ENGINEERING CORPORATION

620-3.2 Equipment. Equipment shall include the apparatus necessary to properly clean the existing surface, a mechanical marking machine, a bead dispensing machine, and such auxiliary hand-painting equipment as may be necessary to satisfactorily complete the job.

The mechanical marker shall be an atomizing spray-type or airless-type marking machine suitable for application of traffic paint. It shall produce an even and uniform film thickness at the required coverage and shall apply markings of uniform cross-sections and clear-cut edges without running or spattering and without over spray.

620-3.3 Preparation of surface. Immediately before application of the paint, the surface shall be dry and free from dirt, grease, oil, laitance, or other foreign material that would reduce the bond between the paint and the pavement. The area to be painted shall be cleaned by sweeping or blowing or by other methods as required to remove all contaminants minimizing damage to the pavement surface. Use of any chemicals or impact abrasives during surface preparation shall be approved in advance by the Engineer. The contractor shall verify the compatibility of the waterborne paint with any existing paint prior to application.

Paint shall not be applied to Portland cement concrete pavement until the areas to be painted are clean of curing material. Sandblasting or high-pressure water shall be used to remove curing materials.

Prior to the application of any markings, the Contractor shall certify in writing that the surface has been prepared in accordance with the paint manufacturer’s requirements, that the application equipment is appropriate for the type of marking paint and that environmental conditions are appropriate for the material being applied. This certification along with a copy of the paint manufacturer’s surface preparation and application requirements must be submitted and approved by the Engineer prior to the initial application of markings.

620-3.4 Removal of Existing Markings. Existing pavement markings or paint striping to be removed shall be obliterated by shot blasting, sand blasting, water blasting or grinding.

Preference shall be given to methods that are non-destructive to the pavement condition at each airport. Materials used in the removal process such as shot, sand, or sediment laden water shall be immediately cleaned from the runway,…