Special_Provisions.pdf

Project Title: Munger Road Bridges #1005 and #2001 – Phase 2

Project Number: 224008 Page 1 of 40

SPECIAL PROVISIONS

MUNGER ROAD BRIDGES #1005 AND #2001 – PHASE 2

BRIDGE #1005 MUNGER ROAD OVER DRAIN 10

PROJECT NO. 224008

Special Provisions to modify the 2017 Idaho Standards for Public Works Construction (ISPWC)

Ada County Highway District Supplemental Specifications to the ISPWC

Prepared by

David Evans & Associates 9179 W Black Eagle Drive

Boise, ID 83709 P 208.900.585.5858

August 21, 2025

This stamp certifies the attached modifications to the ISPWC and ACHD supplemental provisions. It does not certify the

ISPWC or ACHD supplemental provisions.

Project Number: 224008 Page 2 of 40

GENERAL NOTES:

1. ACHD OWNED CONDUIT IMPACTS

ACHD-owned conduit may be shallow and located directly behind the curb or under the sidewalk. The Contractor’s method of sidewalk and/or curb removal shall be done in a manner to avoid damage to conduit and fiber. Any damage shall be repaired at the Contractor’s expense.

2. AMERICANS WITH DISABILITY ACCESS (ADA) DURING CONSTRUCTION

The needs and control of all road users (motorists, bicyclists, and pedestrians within the highway and/or public right-of-way, including persons with disabilities in accordance with the Americans with

Disabilities Act of 1990 (ADA), Title II, Paragraph 35.130) through a temporary traffic control “TTC” zone shall be an essential part of highway construction, utility work, maintenance operations, and the management of traffic incidents. The primary function of TTC is to provide for the reasonably safe and efficient movement of road users through or around TTC zones while reasonably protecting workers, responders to traffic incidents, and equipment.

Temporary facilities, including reasonably safe pedestrian routes around work sites, are also covered by the accessibility requirements of the Americans with Disabilities Act of 1990 (ADA) (Public Law

101-336, 104 Stat.327, July 26, 1990. 42 USC 12101-12213 (as amended)). Implementation of TTC plans and installation and maintenance of devices shall be the responsibility of the contractor performing the construction, alteration and/or maintenance of the highway or public right-of-way.

Temporary traffic control for pedestrians shall meet the accessibility requirements (Standards) set forth in Part 6 of the MUTCD. When an existing continuous sidewalk or street crossing route cannot be maintained for pedestrians because of construction, either temporary walkways with curb ramps are to be provided, or the construction shall be phased to maintain access to the affected addresses.

Contractors shall be allowed flexibility as long as the requirements are met.

The location of the construction project and whether or not accessible facilities are present shall also determine the extent of the needed temporary facilities. The contractor is only required to maintain practical continuity where accessible facilities already exist. On low speed rural roads that do not have sidewalks and are used by bicyclists, no additional measures are needed as the bicycles can share the available travel lanes with other traffic. On moderate to higher speed rural roads, if a bike lane exists then it should be properly detoured, complete with signage, to provide a safe route through or around the work area. If a road or bridge project affects vehicular traffic to a business, residence, school or any other type of pedestrian generating location with existing accessible facilities, then pedestrian and handicapped access must be maintained.

A continuous route for all pedestrians, including the disabled and bicyclists, shall be maintained at all times. When existing pedestrian facilities are disrupted, closed, or relocated in a TTC zone, the temporary facilities shall be detectable and include accessibility features consistent with the features present in the existing pedestrian facility. The temporary route should enable pedestrians to bypass the construction site while minimizing the retracing of their steps or going significantly out of their way. Additional consideration must be given to the disabled since they may not have the physical or cognitive ability to improvise (e.g. balancing along the curb or a very narrow path) or use unofficial alternatives (e.g. using an adjacent grass surface). Temporary routes must meet the accessibility guidelines of the ADA for permanent facilities and shall be marked with the proper signage. Should existing crosswalks at signalized intersections be closed or made inaccessible, temporary crosswalks

Project Number: 224008 Page 3 of 40 should be painted in an accessible location. Temporary signals should include pedestrian phases.

Contractors shall not block temporary walkways with contractor parking, materials piles, signs, rubble or rubbish. Construction equipment and equipment operation must be separated from the temporary walkways. At work zones where higher volumes of pedestrian traffic or school children exist, pedestrian fences or other protective barriers may be needed to prevent access into the construction area.

Detour and diversion routes, when used for pedestrians and bicyclists, should be evaluated for the following items:

• Direct conflicts between pedestrians and vehicular traffic, work vehicles, and other work activities must be reduced with protective barriers or continuous high contrast fencing (min 36” high with a 6” high toe board). See MUTCD 6F.68 and 6D.02

• Temporary pedestrian facilities should provide safe, accessible routes that replicate as nearly as practical the most desirable characteristics of the existing facility, and parallel the disrupted route whenever possible. A smooth, continuous hard surface should be provided throughout the entire length of the temporary pedestrian facility. There should be no curbs or abrupt changes in grade or terrain that could cause tripping or be a barrier to wheelchair use. The geometry and alignment of the facility should meet the applicable requirements of the

Americans with Disabilities Act Accessibility Guidelines (ADAAG) for Buildings and Facilities. See

MUTCD 6D.01 and 6D.02

• Advance information placed at appropriate distances before the work zone allowing pedestrians to make timely decisions about routes through or around the work zone. See

MUTCD 6F.14

• Transition information allowing pedestrians to find a safe path through and around work zones, which is critical when the pathway is restricted, diverted or detoured. See MUTCD 6F.14

• Work area information assisting in safe passage of pedestrians through the work zone. This information is needed on all pedestrian routes except detours. See MUTCD 6F.14

• Exit information directing pedestrians back to the original route. See MUTCD 6F.14

• Crosswalk placement at intersections may need additional signage, temporary striping, traffic signal modification, pedestrian signals with audible alarms if justified, proper push button height, and ramps. See MUTCD 6H.29, 6F.80, and 4E.06

• Accommodations for other transit forms (busses, trains etc.) are made. See MUTCD 6D.02

• Requirements of the ADAAG and MUTCD are adhered to.

• Access is maintained to the affected businesses and residences.

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3. ASPHALT AND CONCRETE CUTTING

Asphalt pavement and concrete cutting shall be incidental to other items of this contract. Contractor shall ensure that cuts made in asphalt and concrete for trenches are parallel and do not wander or diverge from the intended line.

Dust produced by asphalt or concrete saw cuts shall be collected using a high-powered vacuum dust control system, eliminating the dust from entering the atmosphere. The suction device shall be attached to the cutting equipment or positioned to a assure a maximum amount of dust will be collected before it can be released into the atmosphere. The cost to ensure dust is collected during asphalt and concrete cutting shall be considered incidental to the cost of the project and no additional compensation will be made.

4. BASIS OF PAYMENT

Except as modified herein, the various roadway work called for on the Bid Schedule shall be performed, measured, and paid for as indicated on said Bid Schedules and as provided in the 2017

IDAHO STANDARDS FOR PUBLIC WORKS CONSTRUCTION (ISPWC) and the latest supplements. The

Contractor is required to have the current edition of the ISPWC standards to perform this work.

Unless otherwise specified herein, all plan quantities are based upon in-place, completed and accepted units.

5. CONFLICTING PAVEMENT MARKINGS

All conflicting pavement markings shall be completely obliterated using an ACHD approved method prior to applying permanent pavement markings. The cost of performing all obliteration shall be considered incidental to other items and no separate pay item will be included for obliteration of pavement markings.

6. CONNECTING PIPES

Connecting new pipes, manholes, irrigation structures\ditches and catch basins to existing pipes, manholes, irrigation structures\ditches and catch basins is incidental to other work and no additional compensation will be made.

7. CONSTRUCTION STAGING

The Contractor shall furnish ACHD with a detailed construction staging plan based on their anticipated approach to construction activities. This plan and implementation will be the responsibility of the contractor. Final approval of the staging plans and revisions thereof must be granted by ACHD prior to implementation.

Staging plans that may be contained within the project plans are primarily for bidding purposes only.

The contractor may utilize any staging plans contained within the bid documents as a basis for staging but the final staging plan will be provided by the contractor prior to construction activities.

The cost associated with providing the necessary staging plans will be considered incidental to the project and no additional compensation will be made.

Project Number: 224008 Page 5 of 40

8. DAMAGED AREAS BEYOND SPECIFIED CONSTRUCTION LIMITS

Damage to any areas or items not specifically identified for removal, including the existing pavement, sod, sprinklers and landscaping in the contract documents shall be promptly repaired by the contractor. The cost to complete such repairs shall be considered incidental to the cost of the

9. EXCESS SITE MATERIAL

The Contractor shall be responsible for providing a site for the disposal of excess or unsuitable materials. If bituminous material is to be disposed of, the site shall meet the requirements of the Idaho

Department of Environmental Quality. All excess material sites shall be approved by ACHD. No separate payment will be made for the acquisition or operation of the sites, or for loading, hauling or unloading the materials at the site.

10. INFORMATION GIVEN PRIOR TO AWARD

Oral explanations, instructions and interpretations given to bidders prior to award of contract will not be binding. It is the ACHD’s intent to provide all bidders equal opportunity to access and acquire all available pertinent information necessary to formulate a responsive bid. Any information, specifications, plans, data, or interpretations that ACHD discovers is lacking and may be important to all bidders will be furnished in the form of an addenda, the receipt of which shall be acknowledged by the bidder.

11. PROPERTY OWNER COORDINATION

Contractor shall coordinate items of work affecting adjacent property owners, including but not limited to landscape removal and replacement, sprinklers, irrigation facilities, fencing, sod care, and trees. Property access coordination shall be conducted according to General Condition 49 –

PROPERTY ACCESS POINTS.

Construction activities on School property may require background screenings for all construction workers, including subcontractors, expected to work on the School property. The Contractor should be prepared to submit the names of everyone expected to work on School grounds, and the

Contractor should contact the School, two weeks in advance of any construction activities to allow those screenings to take place.

12. PAY QUANTITIES

By the 25th of each month the Contractor shall supply quantities that are to be paid for that month.

Each bid item shall be accompanied with the appropriate backup documentation on how the pay quantity was calculated. This shall include such documentation as, but not limited to; stationing, location, tallied weight tickets, sketch of calculated areas, and/or any other appropriate documentation to verify the pay quantity request. ACHD will verify quantities prior to remitting payment. Items failing to have the appropriate backup supporting documentation will not be paid until the information is supplied. The cost associated with providing the above outlined documentation shall be considered incidental to the project and no additional compensation will be granted.

All Pay quantities shall also adhere to the criteria outlined in General Condition 41 – MANNER OF

PAYMENT.

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13. POWER SUPPLY

If indicated on the plans or directed by ACHD, the contractor shall install a three-wire electrical service to be used at 120/240 volts, single phase, 60 hertz AC between the power supply and the service cabinet. The contractor shall install a junction box a maximum of two (2) feet from the power supply. The distance from the power source to the service cabinet shall not exceed 300’ without approval from the ACHD Signal Coordinator. The contractor shall coordinate with Idaho Power for the power connection location. The District shall be responsible for all Idaho Power fees related to power supply and connection. The contractor shall have Idaho Power submit paperwork to the

ACHD Utility Coordinator for the connection a minimum of sixty (60) working days prior to activating the new power supply. The contractor shall be responsible for all electrical permit fees.

14. SHOP DRAWING REVIEW

Plans show details of all structures, lines, grades, typical cross sections of the roadway, location and design of all structures and a summary of items appearing on the proposal. The Contractor shall keep one set of plans available on the work site at all times.

The Contractor will supplement the plans by such working drawings necessary to adequately control the work. Working drawings shall be submitted to the Engineer for review in advance of the start of the proposed work. The Contractor shall allow sufficient Engineer review time and corrections resubmitted by the Contractor without impacting the approved construction schedule. The drawings shall be on sheets measuring 22 in. x 34 in. Unless otherwise stated in the contract, the Engineer will require up to 15 business days from the date the submittals or re-submittals are received until they are returned to the Contractor. No extension to contract time will be given due to re-submittals or the failure of the Contractor to provide any information necessary in a timely fashion. If necessary, drawings will be signed and sealed by a Professional Engineer licensed to practice in the State of

Idaho.

This review time will increase if the drawings submitted do not meet the contract requirements or contain sufficient details.

For structures, six sets of working drawings shall be furnished and shall include stress sheets, shop drawings, erection plans, coffer dam plans, bending diagrams for reinforcing steel, or any other supplementary plans or similar data required of the Contractor. All structural drawings provided shall be sealed by a Professional Engineer licensed to practice in the State of Idaho.

Working drawings shall be approved before beginning the work covered by the submitted drawings.

Such approval is only for general conformance with the information given in the contract documents and does not relieve the Contractor of responsibility for correctness of the details and dimensions, nor does it waive any requirements of the specifications.

The contract price shall include the cost of furnishing all submitted shop and/or working drawings.

15. STORMWATER FLOWS

The Contractor is responsible for transmitting existing stormwater and irrigation flows during construction. All costs associated with transmitting existing flows, including flows from the

Project Number: 224008 Page 7 of 40 temporary water quality best management practices on the project, shall be considered incidental to other items of work and no additional compensation will be made.

16. STORM WATER MANAGEMENT

Contractor shall implement Best Management Practices (BMPs) controls to protect storm sewer systems and Waters of the United States located on or near project limits. Contractor shall follow the requirements of the Idaho Pollutant Discharge Elimination System (IPDES) Construction General Permit

(CGP) and/or ACHD’s Construction Site Discharge Control (CSDC) Program as required. The contractor is required to implement and maintain BMPs through life of contract. The removal of all temporary construction BMPs after completion of all required work to final stabilization is considered incidental to this project.

The ACHD CSDC Plan shall meet the CSDC Program requirements listed in Sections 8305 to 8306 of the

ACHD Policy Manual https://www.achdidaho.org/Documents/ACHDpolicyManual/7000to9000/Section8300_Construction

SiteDischargeControlProgram.pdf.

The CSDC Plan shall include measures to protect the existing ACHD storm drain systems inside and outside the project boundaries from mud, dust, debris, and other pollutants generated or transported due to this project. All measures will also be implemented to protect any “Waters of the United States” inside or outside of the project boundaries. “Pollutants” are defined in Section 8302 of the ACHD Policy

Manual.

The IPDES CGP Stormwater Pollution Prevention Plan (SWPPP) shall meet the CGP requirements. The

CGP can be found on the Idaho Department of Environmental Quality (IDEQ) website at:

https://www2.deq.idaho.gov/admin/LEIA/api/document/download/16509.

BMPs for controlling pollutant transport from the construction site and activities can be found in a number of publications and locations including, but not limited to:

• Idaho Department of Environmental Quality, Idaho Catalog of Storm Water Best Management

Practices at: https://www.deq.idaho.gov/water-quality/wastewater/storm-water/ or Phone: (208) 373-0502

• United States Environmental Protection Agency – Region 10, Resources and Tools at:

https://www.epa.gov/npdes/construction-general-permit-resources-tools-and-templates or Phone: (800) 424-4372

• Idaho Transportation Department, Best Management Practices (BMP) Manual at:

https://itd.idaho.gov/env/?target=resources or Phone: (208) 334-8476

Payment for this item will be made under the appropriate bid item numbers.

17. SUBGRADE

It shall be the Contractor’s responsibility to maintain the integrity for the exposed subgrade.

Degradation due to his operations or weather shall be remedied under the guidance of a geotechnical engineer.

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All costs to maintain and repair including, geotechnical engineering, etc. shall be incidental to the

18. TRAFFIC CONTROL AND ACCESS DURING CONSTRUCTION

Contractor shall furnish ACHD with a detailed traffic control plan based on their anticipated approach to construction activities. This plan and implementation will be the responsibility of the contractor.

Final approval of the traffic control plan and revisions thereof must be granted by ACHD prior to implementation. It will be the sole discretion of the ACHD Resident Engineer, or designated representative, to determine if the advanced construction signing plan contained in the contract documents shall be approved as a traffic control plan.

Traffic control plans and/or advanced construction signing plans that may be contained within the project plans are primarily for bidding purposes only.

Local and emergency vehicle access shall be maintained at all times, unless otherwise indicated in the contract documents. All traffic control items not specifically listed in the bid schedule shall be incidental to this contract, and no additional compensation will be made. Short term lane closures shall be only as approved by the Resident Engineer.

Access to adjacent properties shall be maintained at all times except as modified by ACHD’s

Supplemental General Conditions. This shall include providing an adequate surface (free of protruding rocks, holes and mud) for all emergency vehicles, vehicles traveling to nearby residences, and pedestrians. The cost of maintaining access shall be considered incidental to other items of work and no separate payment will be made.

19. TACK COAT

Tack Coat is required between lifts of asphalt and between existing and overlayed lifts of asphalt.

Tack Coat shall be CSS-1 Diluted Emulsified Asphalt with an application rate of 0.12 Gallons/SY. Tack

Coat shall be incidental to other pay items and no additional payment made.

20. TRENCHING

All excavation and trenching shall meet OSHA requirements. Trenches shall be backfilled and properly compacted, closed at the end of each day, and barricaded, as needed.

21. UTILITY COMPANY COORDINATION

It shall be the Contractor’s responsibility to contact and coordinate with the various utility companies as necessary for the successful completion of the project. This coordination effort shall include, but not be limited to, working other than normal operation hours to permit the relocation of utilities and construction of the roadway within the time frame of this contract. The cost to contact and coordinate with utilities shall be considered incidental to other items of work and no separate payment will be made.

Utility coordination was requested through ACHD during the design of this project. Utility information is shown only for surface features, and if provided by the owner of the utility for non-surface features.

The information shown is for reference purposes only and does not necessarily represent actual field conditions. The Engineer assumes no liability for the accuracy of the information shown, or conflicts

Project Number: 224008 Page 9 of 40 due to inaccurate or incomplete utility information. The Contractor shall call Dig Line a minimum of 48 hours prior to any excavation to request utility locations at 1-800-342- 1585.

The Contractor shall conform to General Condition 13, PROTECTION OF EXISTING STRUCTURES, UTILITIES, AND WORK. In addition to the requirements outlined in Section 13, the Contractor shall expose all existing utility crossings to verify locations and elevations prior to any other construction that may affect those utilities. The cost associated with exposing the existing utilities is considered incidental to the project and no separate payment will be made.

The Contractor shall notify the underground utility owners 48 hours before final paving to allow for adjustments to valves or manholes.

22. WARNING AND REGULATORY SIGNS

Existing warning and regulatory signing shall be retained and protected throughout the project limits unless otherwise noted. This may require multiple relocations, which will be incidental to other bid items. Existing warning and regulatory signs that are designated for removal and replacement and do not conflict with construction traffic control signs shall be maintained during construction and, if necessary, relocated to locations where the signs are visible to traffic and serve their original purpose.

23. CONSTRUCTION OF IRRIGATION IMPROVEMENTS

All irrigation improvements shall be constructed during the irrigation off-season, generally October

15th to March 15th. All irrigation improvements shall be completed prior to March 15th, 2027.

Contractor shall meet all requirements stated in License Agreements obtained from Irrigation Districts and/or Irrigation users.

24. WORKING HOURS

Unless otherwise specified here the Regular working hours for this contract shall adhere to the criteria outlined in General Condition 40 – WORK HOURS/TIME OF COMPLETION.

25. QUALITY CONTROL/QUALITY ASSURANCE

SECTION 100 – General Conditions

Add the following:

Ada County Highway District Quality Control and Quality Assurance Procedure

Definitions

Quality Assurance (QA) is defined as the process or set of processes used to measure and assure the quality of a product and/or workmanship. This encompasses ACHD’s oversight of the

Developer’s/Contractor’s processes and materials. This includes review of the inspector, sampler, tester and laboratory qualifications (per ACHD Independent Assurance Program defined below);

verifying the results of the quality control and process control testing; and inspecting for conformance to plans and specifications.

Quality Control (QC) is defined as the actions necessary to produce quality workmanship and

Project Number: 224008 Page 10 of 40 materials. QC includes, but should not be limited to, inspection of the production and placement operations, quality control and process control testing and inspection of the finished product. QC is the responsibility of the Developer/Contractor. No separate payment will be made for this work. If quality control testing is not being performed at the required frequency, ACHD may stop production of work until the tests are supplied, or ACHD determines the work can proceed.

Quality Control Testing and Process Control Testing are defined as the testing and inspections conducted by the Developer/Contractor to determine if the construction materials have been produced and placed in compliance with the project specifications and applicable standards. Process control testing is conducted to demonstrate that the construction materials being produced and used continue to meet the requirements for the product.

Independent Assurance Program (IAP) is the process provided by ACHD, through trained and certified staff, to ensure that all testing is performed correctly and testing equipment is functioning and calibrated properly.

Acceptance is determined by the QA test results, in combination with the assurance that the

Developer/Contractor has satisfied the specification requirements for materials quality and workmanship, with the exception of Superpave Hot Mix, as specified below. In addition to the specified testing results, visual inspection of the end product is also taken into consideration in determining acceptance. Acceptance will be determined by ACHD. All samples required for QA testing will be supplied by the Developer/Contractor to ACHD. Prior to obtaining a sample for QA testing, ACHD shall be notified of when and where the sample will be taken from. ACHD will determine if it needs to witness the obtaining of the QA sample. Superpave Hot Mix acceptance shall be based on ACHD’s supplement to the ISPWC Section 814 under Part 4.2.

Construction Testing and Inspection Responsibilities

Quality Control

A. The Developer/Contractor shall be responsible for the Quality Control of all construction processes and materials quality. The Developer/Contractor will be responsible for quality throughout the construction process. Therefore, the Developer/Contractor must ensure that the materials and workmanship provided by themselves, Subcontractors, Suppliers, and Producers meet all pertinent specifications. All tests listed under Quality Control in the Minimum Testing Frequency Table are required for quality control, however only tests listed as Acceptance shall be used in determining pay.

B. The Quality Control laboratory must be approved by the Idaho Transportation Department. All testing personnel and facilities used by the Developer/Contractor must be currently certified by the

Western Alliance for Quality Transportation Construction (WAQTC) and by the ACHD Independent

Assurance Program. All test results must be supplied to ACHD the next working day after the test was performed. All Quality Control tests will be supplied to ACHD directly from the lab performing the tests. Tests results shall have the ACHD project/permit number listed and be sequential.

C. Quality Control Testing must occur in a random frequency and at a minimum, at the intervals specified in the table provided in the corresponding ISPWC sections. The Developer/Contractor shall determine the random locations. Upon request, documentation must be supplied showing how the

Project Number: 224008 Page 11 of 40 random numbers/locations were determined by the Developer/Contractor. All random sampling for

ACHD will be done by the Developer/Contractor and witnessed by an ACHD representative.

D. For gradation testing by the Developer/Contractor during production, each sample size shall be taken per AASHTO T2, except the sample size shall be doubled. The sample obtained shall be split in accordance with AASHTO T248, and half of it shall be marked with an ID number and tested by the

Developer/Contractor. The other half of the sample shall be sealed in a canvas sack or plastic bucket, and marked with the ID number, stored in a weather protected container, and reserved for use in retesting if needed. Material shall be retained until written notification is given by ACHD that it can be discarded.

E. Acceptance, gradation, binder content and volumetrics for plant mix pavement and/or Superpave

Hot Mix asphalt shall be performed on the loose mix sampled from the roadway, haul unit, or an approved sampling method at the Hot Plant. At the start of each project the location for sampling shall be determined by ACHD and all samples for the project shall be obtained from that determined location. The hot mix sample used for asphalt binder content, gradation and volumetric testing shall be doubled in size. The sample shall be split in accordance with AASHTO R47 and half of the sample shall be used for the appropriate testing. The other half of the sample shall be sealed in a box, marked with the sample ID number, stored in a weather protected enclosure, and reserved for use in retesting if needed. Material shall be retained until written notification is given by ACHD that it can be discarded.

Quality Assurance

A. ACHD shall oversee the Developer’s/Contractor’s fulfillment of the QC requirements, and independently verify that the QC test results being submitted by the Developer/Contractor are representative of the workmanship and product quality. ACHD will also be responsible for determining general project acceptance based on conformance to the approved plan and specifications.

B. ACHD will perform random Quality Assurance testing at the intervals specified in Minimum Testing

Frequency table.

C. Acceptance of material will be based on the Quality Assurance test performed by ACHD. If no QA test is performed, acceptance will be based on the QC tests results and inspections as determined by

ACHD.

D. ACHD will perform random inspections of material storage and handling practices.

Dispute Resolution

A. The dispute resolution process is to resolve differences between the Developer/Contractor and

ACHD when a disagreement regarding the test results occurs.

B. When a failing QA test occurs, production may be suspended until the differences are resolved and

ACHD is satisfied.

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C. ACHD may run one or more tests of the split material from the QC process to help resolve differences.

D. When ACHD and the Developer/Contractor are unable to resolve the differences, a Third Party prequalified independent lab shall be brought in to verify testing.

E. ACHD will hire the Third Party independent lab. If ACHD tests are found to coincide with the independent lab, ACHD will not grant additional contract time due to any delays in production and the Developer/Contractor shall bear the costs associated with the Third Party resolution. Likewise, if the Developers/Contractors tests are found to coincide with the independent lab, ACHD will bear the costs associated with Third Party resolution and will grant additional time for any delay caused by this additional testing.

F. For hot mix density dispute testing, cores shall be obtained by the Third Party from the same locations as the nuclear gauge tests.

Independent Assurance Program

A. ACHD practices the standards of the Western Alliance for Quality Transportation Construction

(WAQTC).

B. ACHD Independent Assurance personnel may observe testers and verify that the equipment and techniques used for the required testing are calibrated and performing accurately, per WAQTC.

During construction, it may be necessary for an IAP representative to verify the reliability of the tester by witnessing sampling and testing, and by splitting samples and comparing results.

C. All independent testing laboratories to be used shall be pre-qualified by ACHD prior to construction.

To request an inspection and certification, contact the ACHD Lab Coordinator at 387-6310 to schedule. Laboratories that are currently certified by the Idaho Transportation Department (ITD) can provide ACHD with their current certification as confirmation of qualification. In the event that the lab is ITD certified; a facility inspection by ACHD IAP personnel may still be required.

Price Adjustment for Non- Compliant Materials or Products

A. When material fails to meet the required specifications, they will be subject to a price adjustment or rejection. ACHD may also request a lengthened warranty period.

B. ACHD will, in its sole, discretion determine the price adjustment or rejection.

C. The determined price adjustment or rejection of material shall be applied to the quantity of material that is represented by the non-compliant test results, as outlined in the Minimum Testing Frequency table.

Minimum Testing Requirements

A. The requirements outlined herein are the established minimum acceptance requirements for materials used in standard applications and paid for under standard bid items. For special provision items, material used in non-standard, non-roadway, temporary applications, or small quantities of materials, alternative materials acceptance requirements will be determined as discussed herein or

Project Number: 224008 Page 13 of 40 as specified in the contract documents, or as otherwise approved by ACHD. Material placed without appropriate testing shall be subject to a price deduction or rejected as determined by ACHD.

B. Minimum testing frequencies are included in the Minimum Testing Frequency table. The

Developer/Contractor frequencies may only be altered by Change Order approved by ACHD. ACHD may elect to increase its own testing frequency at any time. Testing frequency should be increased when accepting material from newly developed sources or those with varying results.

C. Material source approval requirements are not listed in this document. All fill and aggregate material imported to the project must be obtained from ACHD or ITD approved materials sources.

D. Based on inspection and without regard for testing frequency, ACHD may isolate and reject obviously defective material.

E. When the material is not listed in the Minimum Testing Frequency table and not identified in the

ISPWC, acceptance shall be determined by ACHD.

F. When the material is required by the Contract to meet a given specification, such as ASTM or

AASHTO, acceptance of material will, at a minimum, require a manufacturer’s certification. A partial list of such material is outlined in the List of Miscellaneous Material Accepted on the Basis of

Manufacturer’s Fabricator’s Certification.

Small Quantities

A. ACHD may accept small quantities of certain materials without sampling and testing. The determination to accept materials using this provision rest solely with ACHD.

B. The following are not eligible for small quantity acceptance:

i. Concrete with a specified strength of greater than 3000 psi.

ii. Paving on the roadway with quantities above 100 ton.

C. Materials may be accepted as a small quantity if the estimated quantity is less than the minimum QC testing frequency. The small quantity exception may be used on pavement items such as; small patches, utility repairs, pavement placed outside the traveled way (driveways, approaches, mailbox turnouts, asphalt sidewalk and curb), and temporary pavement.

D. The minimum requirements that must be met for small quantities includes; approved sources, mix design, material certifications, inspection, and a core for density acceptance of mainline and intersection paving less than 100 tons.

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SPECIAL PROVISIONS

1. 202.4.1.A.1 – EXCAVATION (PLAN QUANTITY)

ON PAGE 14 OF SECTION 202 OF THE ISPWC, PART 4.1.A, replace the entire section with the following:

This item shall be paid for by the cubic yard on a plan quantity basis with no final measurement, for which the price and payment shall constitute full compensation for excavating, loading, hauling, spreading, blending, shaping, drying, watering and compacting excavated material that is acceptable for the use as on-site borrow for embankment fill, and for all tools, labor, equipment, materials and incidentals necessary to complete the work and all appurtenances not itemized on the Bid Schedule.

Payment for this item will be made under:

202.4.1.A.1 – Excavation (Plan Quantity) ....................... ……………………………………Per Cubic Yard

2. 706.4.1.F.1 – CONCRETE DRIVEWAY APPROACH

ON PAGE 7 OF SECTION 706 OF THE ISPWC, PART 4.1.F, add the following:

This item includes all labor, equipment and materials necessary to construct a 6” thick concrete driveway approach over 4” of ¾” minus crushed aggregate base material as shown on project plans.

The contractor shall limit any driveway closures to 3-days without prior approval from ACHD and the

Property Owner.

Excavation and ¾” minus crushed aggregate base material shall be paid separately.

Payment for this item will be made under:

706.4.1.F.1 – Concrete Driveway Approach ................... Per Square Yard

3. 706.4.1.E.1 – CONCRETE SIDEWALK

ON PAGE 7 OF SECTION 706 OF THE ISPWC, PART 4.1.E, add the following:

This item includes all labor, equipment, and materials necessary to construct concrete sidewalks in locations identified on the project plans. Sidewalk cross slope shall not exceed 2% maximum and should be constructed per SD-709.

Excavation and ¾” minus crushed aggregate base material shall be paid separately.

Payment for this item will be made under:

706.4.1.E.1 – Concrete Sidewalk ..................................... Per Square Yard

4. 706.4.1.H.1 – PEDESTRIAN RAMP W/ DETECTABLE WARNING DOMES

ON PAGE 7 OF SECTION 706 OF THE ISPWC, PART 4.1.H, add the following:

This item shall include all costs associated with completion of the required concrete pedestrian ramps. All pedestrian ramps shall have a minimum four (4) foot wide throat, if not specified on the project plans. All pedestrian ramps shall include full width prefabricated truncated domes as shown on the project plan sheets. Refer to ISPWC standard drawings SD-712* and ACHD Supplementals for additional details. All pedestrian ramps shall be constructed in full compliance with current requirements of the Americans with Disabilities Act (ADA). Truncated domes are considered incidental to this bid item and no additional compensation will be granted.

Project Number: 224008 Page 19 of 40

Payment for this item will be made under:

706.4.1.H.1.A.A – Pedestrian Ramp w/ Detectable Warning Domes, Type SD-712A……………….Per Each

706.4.1.H.1.C.C3 – Pedestrian Ramp w/ Detectable Warning Domes, Type SD-712C………………Per Each

706.4.1.H.1.G.G – Pedestrian Ramp w/ Detectable Warning Domes, Type SD-712G………………Per Each

5. 801.4.1.B.1.6 – 6” MINUS UNCRUSHED AGGREGATE BASE

ON PAGE 2 OF SECTION 801 OF THE ISPWC, PART 2.1 – DESCRIPTION, add the following:

E. The material shall have a minimum R-value of 70.

ON PAGE 6 OF SECTION 801 OF THE ISPWC, PART 4.1.B, add the following:

The pay quantity for this item was calculated using a unit weight of 135 pcf at a moisture content of 7 percent.

Payment for this item will be made under:

801.4.1.B.1.6 – 6” Minus Uncrushed Aggregate Base .... Per Ton

6. 802.4.1.A.1 – CRUSHED AGGREGATE FOR BASE - TYPE I (Plan Quantity)

ON PAGE 7 OF SECTION 802 OF THE ISPWC, PART 4.1, add the following:

Material will be calculated using plan quantity.

Payment for this item will be made under:

802.4.1.A.1 – Crushed Aggregate Base - Type I (Plan Quantity)….Per Cubic Yard

7. 814.4.1.A.1 – PLANT MIX PAVEMENT – SUPERPAVE SP-3

Division 800 –

• Section 810 – Plant Mix Pavement, Part 1.2 – Related Sections, Paragraph E will be deleted in its entirety

• Section 814 – Superpave Plant Mix Asphalt shall be added in its entirety

SECTION 814

SUPERPAVE PLANT MIX ASPHALT

PART 1 GENERAL

1.1 SECTION INCLUDES

A. This work consists of constructing one or more courses of Superpave Plant Mix pavement in accordance with these specifications and in reasonably close conformity to the lines, grades, thicknesses, and typical cross section(s) shown in the Contract Documents, or as established.

1.2 RELATED SECTIONS

A. Section 803 – Plant Mix Aggregate

B. Section 805 – Asphalt

C. Section 806 – Tack

D. Section 810 – Plant Mix Pavement

1.3 REFERENCES

Project Number: 224008 Page 20 of 40

A. AASHTO Standard Specifications for Transportation and Methods of Sampling and Testing

B. WAQTC – Western Alliance for Quality Transportation Construction

PART 2 MATERIALS

2.1 CLASSIFICATION

A. The Superpave HMA shall be composed of a combination of aggregate, mineral filler (if required), and performance graded (PG) asphalt binder material. The Contractor shall furnish a job mix formula

(JMF) and a HMA pavement that complies with the following requirements. Any JMF dated more than 1-year from the date of submittal will either require updated specific gravities from the original crush, or a new JMF. Updated specific gravities shall not alter the JMF target values out of tolerance;

otherwise a new JMF will be required.

2.2 HOTPLANT, AGGREGATE, MIX DESIGN REQUIREMENTS and PRODUCTION LIMITS

A. Hotplants shall be capable of producing a printed ticket every 15 minutes during production paving that will be submitted daily to the Contract Administrator and include the following information:

a. Date

b. Time Printed

c. Project Identity (i.e., name, number, location)

d. Material Quantity

B. Aggregate for all mixes, except SP2, as a minimum shall be provided in two separate stockpiles.

Aggregate shall be crushed stone or crushed gravel of such gradation that when combined with other required aggregate fractions and fillers, in proper proportion, the resultant mixture meets the gradation required under the composition of mixture for the specific class under contract.

B. The fractions for the mixture shall be sized, graded, and combined in such proportions that the resulting blend conforms to the grading requirements as defined in Table 1 below.

C. Aggregates shall meet the requirements of Section 803 – Plant Mix Aggregates with the exception of

Table 1 through 4.

Table 1

SUPERPAVE AGGREGATE DESIGN BANDS and VMA TOLERANCES

SIEVE SIZE NOMINAL MAXIMUM SIZE

3/4 in. 1/2 in. 3/8 in.

PERCENT PASSING

1 in. 100

3/4 in. * 90-100 100

1/2 in. 90 max * 90-100 100

3/8 in. * 52-80 90 max * 90-100

No. 4 - - 90 max

No. 8 * 23-49 * 28-58 * 32-67

No. 200 * 2.0-8.0 *2.0-10.0 * 2.0-10.0

VMA, % Minimum 13.0 14.0 15.0

PRIMARY CONTROL SIEVE (PCS) CONTROL POINT FOR MIXTURE NOMINAL MAXIMUM AGG

SIZE **

Project Number: 224008 Page 21 of 40

Primary Control Sieve No. 4 No. 8 No. 8

PCS Control Point

(% passing) 47 39 47

1. * Denotes the sieves that will be used for mix design control points and quality analysis sieves for

Class SP2 mixes.

2. ** The combined aggregate gradation shall be classified as coarse graded when it passes below the

PCS control point as defined in table 1. All other gradations shall be classified as fine graded. (This classification is based on the Contractors JMF and not individual gradation tests.)

TABLE 2

SUPERPAVE MIXTURE REQUIREMENTS

Minimum Use Temporary Paving Local, Arterials & Collectors

Quality Characteristics SP2 SP3 SP5

Design ESALs (million) (1) < 1 1 - <10 10 - < 30

Gyratory Compaction

Gyrations for Ndes 50 75 100

Relative density, %Gmm@Ndes 96.0 96.0 96.0

Air Voids, %VA 4.0 4.0 4.0

Dust to Binder Ratio Range, DP (2) 0.6-1.4 0.6-1.4 0.6-1.4

Voids Filled with Asphalt, % VFA range 65 – 78 65 – 75 65 – 75

Idaho Degradation, max loss, % 5.0

Ethylene Glycol, min retained, % 90

R-Value 80 or more

Sodium Sulfate Soundness, max loss after

5 cycles, % (3)

LA Wear – AASHTO T-96, Max % loss

35 30 30

Fractured Face -

1 fracture/2 fracture, % Min (4) 65/- 75/60 95/90

Uncompacted void content of fine agg, %

Min 40 40 45

Sand Equivalent, % Min 35 40 45

Flat & Elongated, % Max 10 10 10

(1) The anticipated project traffic level expected on the design lane over a 20-year period. Regardless of the actual design life of the roadway, determine the design ESALs for 20 years.

(2) For No. 4 nominal maximum size mixtures, the dust-binder-ratio is 0.9 to 2.0. If the aggregate gradation passes beneath the PCS Control Point specified in Table 1, the allowable dust-to-binder ratio range may increase from 0.6-1.4 to 0.8-1.6.

(3) Perform sodium sulfate soundness testing when requested by the Engineer.

(4) 95/90 denotes that 95% of the coarse aggregate has one fractured face and 90% has two or more fractured faces.

Table 3

Project Number: 224008 Page 22 of 40

SUPERPAVE PRODUCTION REQUIREMENTS

Quality Characteristics SP2, SP3,SP5

Asphalt Binder, % PBe JMF value ± 0.4

Laboratory Air Voids, % Va 4.0 ± 1.0

Voids in Mineral Agg, VMA Per Table 4

Table 4

SUPERPAVE AGGREGATE GRADATION & VMA TOLERANCES - PRODUCTION

SIEVE SIZE TOLERANCES FROM JMF

3/4 in. 1/2 in. 3/8 in.

1 in. – No.4 JMF value ± 6.0%

No. 8 – No. 30 JMF value ± 5.0%

No. 50 – No. 100 JMF value ± 4.0%

No. 200 JMF value± 2.0%

VMA, % min 13.0 14.0 15.0

1. Please see ACHD’s QC/QA table for sampling requirements

2. Tolerances cannot be outside of design band

2.3 ASPHALT

A. Asphalt Binder shall meet the requirements of Section 805 – Asphalt.

1. Asphalt to be of the type and grade called for in the Contract Documents.

2. Asphalt will be accepted at the point of delivery.

3. Unless otherwise permitted, all asphalt for a specified project shall be furnished by one (1) supplier. If a change of supplier for asphalt is proposed, or if blending of plant mix asphalt from more than one supplier is proposed, mix design testing and verification are required as conditions of approval.

2.4 ANTI-STRIPPING ADDITIVE

A. Anti-stripping additive shall be added by the binder supplier.

B. All Superpave Plant Mixes shall use a minimum 0.5% approved liquid anti-stripping additive by weight of asphalt.

2.5 TEST METHODS

A. Sieve Analysis of Fine and Coarse Aggregates – AASHTO T 27.

B. Materials Finer than No. 200 sieve in Mineral Aggregates by Washing –AASHTO T 11.

C. Preparing and Determining the Density of HMA Specimens by Means of the

Superpave Gyratory Compactor – AASHTO T 312.

D. Percentage of Fracture in Coarse Aggregate – AASHTO TP 61.

E. Plastic Fines in Graded Aggregate and Soils by Use of the Sand Equivalent Test –AASHTO

T 176.

F. Flat and Elongated Particles in Coarse Aggregate – ASTM D 4791

G. Theoretical Maximum Specific Gravity and Density of HMA Paving Mixtures – AASHTO T

209.

Project Number: 224008 Page 23 of 40

H. Bulk Specific Gravity of Compacted HMA using Saturated Surface-Dry Specimens –

AASHTO T 166.

I. Sampling Bituminous Paving Mixtures – AASHTO R 97.

J. Sampling Bituminous Materials – AASHTO T 40.

K. In Place Density of HMA – AASHTO T 355.

L. Determining the Asphalt Binder Content of HMA by Ignition method – AASHTO T 308.

M. Bulk Specific Gravity of compacted HMA mixtures using saturated surface-dry specimens

– AASHTO T 166.

N. Mechanical analysis of extracted aggregate – AASHTO T 30

O. Standard Method of Test for Quantitative Extraction of Asphalt Binder from HMA -

AASHTO T 164

P. Standard Specification for Performance-Graded Asphalt Binder – AASHTO M 320

Q. Standard Specification for Superpave Volumetric Mix Design – AASHTO M 323

R. Standard Practice for Recovery of Asphalt Binder from Solution by Abson Method –

AASHTO R 59

PART 3 WORKMANSHIP

3.1 Workmanship shall meet the requirements of Section 810, Part 3. Including, but not limited to, mixing plant, sampling devices, all equipment, paver, rollers, mix design approval and weather limitations and cutoff dates. Pavement shall be compacted to a range between 92%

- 96% of the theoretical maximum value from the JMF on the mat. Recycled plant mix (RAP) will be allowed up to 30% by weight of binder as outlined in the requirements of Section 810, Part 2.5

PART 4 MEASUREMENTS AND PAYMENT

4.1 Measurement and payment shall meet the requirements of Section 810, Part 4 and unless otherwise specified in the contract documents, acceptance of the Superpave plant mix and the incentive/disincentive payment will be in accordance with section 4.2.

A. Incentive/Disincentive payments will not be calculated for quantities under 1500 tons.

Failing tests are subject to rejection or pay reduction as determined by Engineer.

4.2 Acceptance, Pay Factors & Incentive/Disincentive Payment. For projects not funded by

ACHD, a pay factor of 1.0 will be used, and material failing to meet the project specifications will be subject to rejection, an extended warranty, or a fee.

A. Mix Characteristic Acceptance and Pay Factors

Determine the arithmetic mean, X

X = x n i

Where

Σ = Summation xi = Individual test value n = Total number test values

Project Number: 224008 Page 24 of 40

Compute the sample standard deviation, (S)

S = ( x - X ) n -1 i

Compute the upper quality index (Qu).

u Q =

USL - X

S

Where USL = Upper specification limit.

S = Standard deviation

L Q =

X - LSL

S

Compute the lower quality index (QL).

Where LSL = Lower specification limit.

S = Standard deviation

Determine PU (percent within the upper specification limit, which corresponds to a given QU) from Table7. If a USL is not specified, PU will be 100.

Determine PL (percent within lower specification limit, which corresponds to a given QL) from Table 7. If a LSL is not specified or the specification is zero (0), PL will be 100.

Determine the Quality Level(QL) (the total percent within the specification limits).

Quality Level(QL) = (PU + PL) – 100

For air voids, each lot…