Performance-Based Pavement Warranty Practices (2020)

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A P P E N D I X F Pennsylvania DOT Warranty Information F-1 Section 496—Asphalt Concrete Pavement, 60-Month Warranty 496.1. DESCRIPTION—This work is construction of a plant-mixed, asphalt concrete pavement on a prepared surface with a 60 month warranty and includes the furnishing of a warranty bond. Acceptability of this work will be determined by construction end-result and the warranty performance criteria. 496.2. MATERIAL—Provide material which ensures that the asphalt concrete pavement meets the warranty performance criteria. Select the type and class of bituminous material, type of aggregate, and, when necessary, type of filler to be used in the constructed pavement. For wearing courses, use aggregate, having the specified SRL designation, from a source listed in Bulletin 14. An aggregate designation or blends, equal to or better than that specified, may be supplied. Blends are 50% by weight. (a) Composition of Mixtures. Establish the JMF(s) using a volumetric mix design procedure with the Superpave Gyratory Compactor (SGC). Submit mix design(s) on the most current version of the TR-448A form, signed by a Certified Bituminous Level 2 Plant Technician, to the DME/DMM at least 7 calendar days before its use in the work. The submitted mix design(s) will be used for information only and will become part of the as-built project files. Submission of the mix design(s) will not relieve the Contractor from responsibility for meeting the specified construction end-result or warranty performance criteria. Stone Matrix Asphalt (SMA) wearing course mixes may be submitted for consideration. For each mix design, provide the following information: • Date of Submission • Project S.R., Section, and County • Project Contract No. • Bituminous Concrete Producer: Name and Location • Bituminous Plant Type • Aggregate Producer: Supplier Code, Material Code/Class, Percent in Mix, Bulk Specific Gravity and Percent Absorption • Asphalt Cement Producer: Supplier Code, Material Code/Class, Percent in Mix and Bulk Specific Gravity • Volumetric Mix Design Method • Other JMF Materials: Source, Material Code/Class, Percent in Mix, Bulk Specific Gravity and % Absorption (if applicable) • JMF: Design and Upper and Lower Tolerances for production control • SGC Gyrations at Nini, Ndes, and Nmax • Combined Aggregate Bulk Specific Gravity (Gsb) • Theoretical Maximum Specific Gravity (Gmm) or Density • Laboratory Specific Gravity at Ndes (Gmb) or Density • Voids in Mineral Aggregate (VMA), percent by volume • Voids in Total Mixture (VTM), percent by volume • Voids Filled with Asphalt (VFA), percent by volume • Ignition Furnace Correction Factors for Asphalt Binder and 0.75 μm (No. 200) Sieve

F-2 Performance-Based Pavement Warranty Practices • Combined Aggregate Consensus Properties (Sand Equivalency, Fine Aggregate Angularity, Coarse Aggregate Angularity, Flat & Elongated Pieces) • Gradation Chart (FHWA 0.45 Power Type) with JMF plotted • Types and results of additional mixture testing, if performed • Designer's signature Ensure that all component materials shown in the mix design are representative of the materials that will be used on the project. If, for any reason, a change in material source or other adjustments are necessary during construction, before using any new material notify the DME/DMM in writing, explaining the need for the change. Submit a copy of the revised JMF with the written notification. 1. QC Plan. Prepare a QC plan, as specified in Section 106, and submit it at the start of the project. Do not start work until the QC plan and the JMF have been submitted. The submitted QC plan will be used for information only and will become part of the as-built project files. Provide certified results of QC testing to the Representative within 48 hours of material sampling. The submitted test results will be used for information only and will become part of the as-built project files. (b) Warranty Bond and Liability Insurance. When awarded the contract, in addition to the required bonds specified in Section 103.04, furnish a Warranty Bond, with sufficient surety or sureties, in an amount equal to 50% of the total contract amount for all pavements to be constructed under the pavement warranty item(s). Have the bond specify that remediation work will be completed in a manner satisfactory to the Secretary. Have the bond state that the State is to be saved harmless from any expense or damage incurred through the failure of the Contractor to complete remediation work, as specified, or from any damages growing out of the carelessness of the Contractor, the Contractor's employees, or subcontractors in performing remediation work. Have a corporate surety, legally authorized to transact business in the State and satisfactory to the Secretary, execute the bond. If the Secretary decides the bond surety is unsatisfactory, promptly furnish any additional required security to protect the State's interests and the interests of all persons, firms, or corporations who/which have furnished material, provided equipment on rental, or supplied/performed labor services on, or in connection with, the performance of the remediation work for this contract. The Warranty Bond is to be effective beginning on the date of physical work completion, established by the Representative for the whole project or any substantial project section, as specified in Section 110.08(a). The Warranty bond is to remain in effect for a period of 60 months from the effective date or until completion of all remediation work identified in the final annual performance surveys, whichever is later. If a substantial section of the project is completed in advance of the whole, the Contractor may request that a final inspection of that section be conducted. If the Department accepts the work on the section of the project, in writing, and the section is opened to normal traffic, the warranty period for that section will start in advance of the date of physical work completion for the entire project. The Warranty Bond, however, must remain in effect until all criteria established in Section 496.3(c)6 are satisfied, and the Warranty Acceptance Notification has been issued. The amount of the warranty bond will be reduced proportionately if the warranty period for a portion of the work expires in advance of the warranty period for the remainder of the work. Maintain insurance to indemnify and save harmless the Commonwealth, the Department, and all of its officers and employees from all suits, actions, or claims of any character, name, and description, brought for or on account of any injuries or damages received or sustained by any person, persons, or property related to the performance of any work by the Contractor, these pavement items, or to remedial actions taken throughout the warranty period, whether the same is due to the use of defective material, defective workmanship, neglect in safeguarding the work or public interests, or by or on account of any act, omission, neglect or misconduct of the Contractor. 496.3. CONSTRUCTION—Provide an asphalt concrete pavement meeting the requirements specified herein and capable of meeting the warranty performance based criteria specified herein. Construct the pavement as a combination of two or more different asphalt concrete pavement courses to achieve the total depth indicated. (a) Tests for Depth of Binder and Wearing Courses. Within 24 hours after final compaction, in the presence of the Inspector, drill one, 4-inch diameter or larger core through all lifts and courses placed under this item of • Moisture Sensitivity Data (Tensile Strengths, Tensile Strength Ratio, Date Performed) or (Hamburg Wheel Tracking Results)

Pennsylvania DOT Warranty Information F-3 will determine core locations using PTM No. 1, excluding any transitional areas indicated. The Inspector will measure the depth of each core according to PTM No. 737. When any one core depth measurement indicates the pavement is deficient in depth by more than 1/4 inch, which cannot be satisfactorily corrected, the affected pavement area will be considered defective work. When core depth measurements indicate that the pavement is uniformly deficient in depth by more than 1/8 inch in any three consecutive core locations and the deficiency cannot be satisfactorily corrected, the affected pavement area will be considered defective work. After the Inspector completes depth measurements, backfill, compact, and seal core holes with mixture used to construct the wearing course. After depth measurement, the cores may be used for QC testing. Immediately correct pavement that is deficient in depth starting at the point of the determined deficiency, and proceed longitudinally and transversely until the depth within the limits of the entire repair area is within 1/4 inch of the required depth. Drill additional cores as needed, both forward and back of the cores determined to have deficient depth, to determine the actual starting and ending point of the deficiency. Coring operations will not exclude pavement from the warranty performance criteria. (b) Information Samples for the Department. The Department reserves the right to direct the Contractor to obtain loose mixture box samples and/or pavement core samples at random locations selected by the Inspector according to PTM No. 1 for testing at the LTS for informational purposes only. If directed and in the presence of the Inspector, obtain n=1 loose mixture box samples from directly behind the paver before the material is compacted. Immediately package loose mixture samples in individual cardboard boxes sized no larger than 240 cubic inches and identify each sample by number, location (lane, direction, and station), date of placement, mixture type, and as Information Samples (Sample Class IF). Immediately deliver the packaged loose mixture box samples to the Inspector. If directed and in the presence of the Inspector, drill and obtain n=1 6-inch diameter pavement core samples for each 1,000 tons of material placed. Do not bend, compress, or distort samples during cutting, handling, transporting, and storing. If core samples are damaged, immediately obtain replacement samples, as directed by the Inspector, from within 12 inches of the original sample location. Obtain samples no later than 24 hours after placement. Identify the samples by number, location (lane, direction, and station), date of placement, mixture type, and as Information Samples (Sample Class IF). Immediately package and deliver the samples to the Inspector. Within 24 hours after coring, backfill the hole with mixture of the same JMF or with mixture used for subsequent courses and compact and seal the mixture. (c) Warranty. 1. Performance Criteria. Performance results will be determined by automated surveys. These distresses will be identified, measured, and reported using the survey techniques, rating procedures, and extent estimation procedures in accordance with Publication 336. Surveys will be performed by the Department or a designee. Manual surveys, when necessary, will be performed according to Publication 336. Performance results for flushing and potholes will be determined by manual surveys. For each Segment, or partial Segment, performance criteria limits for distresses are indicated in Table A. A segment is defined as a division of the State Route approximately one-half mile in length with termini designated by the Department typically beginning and ending at physical features. The segment beginning points will be designated on the plans. If the last performance survey (year 5) determines that 30% of segment area has two or more distresses with low severity, then remedial action is required by microsurfacing, or other treatment approved by the Department. TABLE A Performance Criteria Distress Limits PERFORMANCE CRITERION THRESHOLD LEVEL REMEDIAL ACTION Fatigue cracking All medium or greater severity* Remove and replace distressed layers full lane width to a depth necessary to correct observed distress but not to exceed warranted pavement and length not less than 10 feet beyond the distressed area. work to the top of the existing pavement or base, for each 2,000 linear feet of pavement lane. The Inspector

F-4 Performance-Based Pavement Warranty Practices PERFORMANCE CRITERION THRESHOLD LEVEL REMEDIAL ACTION Cracking (transverse & miscellaneous) Raveling / Weathering All low to medium severity* Crack seal as specified in Section 469. All high severity* Remove and replace distressed layers full lane width to a depth necessary to correct observed distress but not to exceed warranted pavement and length not less than 10 feet beyond the distressed area. All medium or greater severity* Remove and replace distressed layers full lane width to a depth necessary to correct observed distress but not to exceed warranted pavement and length not less than 10 feet beyond the distressed area. Rutting > 3/8 inch Remove and replace distressed layers full lane width to a depth necessary to correct observed distress but not to exceed warranted pavement and length not less than 10 feet beyond the distressed area. Flushing ALL Remove and replace distressed layer full depth and full or half lane width (longitudinal joint at center of lane for half lane width) and a minimum of 24 inches beyond distressed pavement in all longitudinal directions. Potholes (including slippage areas) ALL Remove and replace distressed layers full lane width to a depth necessary to correct observed distress but not to exceed warranted pavement and length not less than 10 feet beyond the distressed area. Longitudinal joint deterioration Edge deterioration (shoulder joint) All medium severity* Crack seal as specified in Section 469. All high severity* Remove and replace distressed layer one foot either side of the joint transversely and a minimum of 24 inches beyond distressed pavement in all longitudinal directions. Longitudinal joint deterioration Left edge joint (lane joints) All medium severity* Crack seal as specified in Section 469. All high severity* Remove and replace distressed layer one foot either side of the joint transversely and a minimum of 24 inches beyond distressed pavement in all longitudinal directions. NOTE: Should deviations beyond the threshold levels indicated in Table A in combination total a remedial action area greater than 20% of the surface area of any segment of pavement as defined herein, (except that, for this determination, a medium severity crack referenced above will be considered to be a deviation affecting 6 inches on either side of the crack for the entire length of the crack) remove and replace the entire segment. Should the distance between repair areas be less than 100 feet, make one continuous repair. All repairs must meet the surface tolerance as specified in Section 409.3 (l). 2. Remediation Work under the Pavement Warranty. 2.a Department's Responsibility. To determine compliance with specified performance criteria the Department will be responsible for conducting an annual performance analysis, the basis of which will be the distress criteria established in Table A. The Department will schedule and perform annual surveys, and additional surveys if needed, of the warranted pavement for flushing and potholes. When needed, Rut Depth measurements will be verified using a 12 foot straight edge, across the lane width, to determine the severity and extent. Surveys will be conducted annually throughout the warranty period. The Contractor will be notified at least 14 calendar days in advance of all

Pennsylvania DOT Warranty Information F-5 scheduled manual surveys. In addition, the Department will routinely schedule and perform traffic classification counts to confirm that Equivalent Single Axle Load (ESAL) estimates remain within the projected values included in the contract documents. The Department reserves the right to schedule and perform additional or more frequent performance surveys if, at any time during the warranty period, evidence exists that performance criteria are not being met. The Department will provide the Contractor with access to the results of all performance surveys and traffic counts. Performance survey results will be reported for each individual State Route Segment as established under the Department's Location Reference System (LRS) or partial Segment within the limits of the warranty project. Within 14 calendar days after completion, the Department will notify the Contractor, in writing, of the results of performance surveys, identifying the Segment (location) and the performance criterion, and indicating whether specified distress limits have been met or exceeded. After performance surveys are completed, if the Department determines remedial action is necessary, the Contractor will be notified within 5 calendar days, from the date of that determination, that remediation work is required. During the warranty period, the Department will not perform routine pavement maintenance, such as crack sealing and base repairs, on the warranted pavement. If the Department determines emergency repair work is necessary, the Contractor will be notified immediately of the emergency repair work that is required. The Contractor will be given 24 hours to review the emergency repair work that is needed and notify the Department if they will perform the required repairs. When the Contractor notifies the Department agreeing to make the required emergency repairs, they must begin repair work within 48 hours of the Department’s initial notification. If the Contractor does not notify the Department within 24 hours or begin the repair work within 48 hours of the Department’s initial notification, the Department reserves the right to make emergency repairs to the warranted pavement during the warranty period. If the pavement condition is determined to be potentially harmful or unsafe, the Department reserves the right to make immediate emergency repairs to the warranted pavement during the warranty period. The Department will then notify the Contractor of the location of all emergency repairs performed. The costs expended by the Department for any emergency repair work needed to correct deficiencies covered under the terms of this warranty specification will be the responsibility of the Contractor. 2.b Contractor's Responsibility. The Contractor’s obligation to perform required remediation work shall survive acceptance of the work and final settlement of the Contract. The Contractor may witness all manual performance surveys. Where survey results for a given Segment indicate that performance criteria distress limits for one or more distress types have been exceeded, perform the remediation work described in Table A. If proposing to utilize a method of testing, measurement, or remedial action other than that prescribed, submit a plan that includes a detailed description of the proposed testing, measurement, or remedial action to the Representative for review and approval. The Department will review and approve or disapprove the submitted testing, measurement, or remedial action plan within 5 calendar days of receipt of the submission. Complete remediation work required as part of the pavement warranty, at the location(s) indicated, within 60 calendar days after receipt of the Department's written notification that remediation work is required. Perform remediation work to meet the material and performance criteria requirements contained herein. Notify the District Executive of the tentative start date for remediation work and submit a schedule for remedial repairs within 5 calendar days of that notification. If remediation work does not begin by the start of the 61st calendar day after the date of the Department’s written notification, the Contractor will be responsible to pay an amount equivalent to the Construction Engineering Liquidated Damages as specified in Section 108.07. This cost will accrue until the required remedial work ends. In addition to the continuing cost equivalent to the Construction Engineering Liquidated Damages, costs equivalent to Road Users Liquidated Damages as specified in Section 108.07 will be assessed no sooner than the 61st calendar day after the date of the Department’s written notification, for each calendar day that the roadway is not open to unrestricted traffic. If inclement weather prohibits quality repairs, the Contractor will be responsible for placing and maintaining temporary repairs until permanent remediation work can be properly completed. Charges equivalent to Road Users Liquidated Damages will not be assessed following temporary repair work, provided the temporary repairs are properly maintained. Permanent repairs are to be constructed as soon as weather permits. The Department will notify the Contractor in writing when weather conditions permit permanent repairs. Charges equivalent to Construction Engineering Liquidated Damages and

F-6 Performance-Based Pavement Warranty Practices Road Users Liquidated Damages will resume beginning 5 calendar days beyond this notification until permanent repairs are completed. In the final year of the warranty period, segments with distresses that cannot be repaired due to inclement weather will have the warranty period extended for these segments only until permanent repairs are satisfactorily completed. The warranty bond can be reduced proportionately to cover only the distressed segments. All charges equivalent to Liquidated Damages as referenced herein will be determined from original contract documents. Furnish all materials, equipment, and labor needed to perform remediation work required as part of the pavement warranty, including traffic control, at no cost to the Department. When the remedial action specified in Table A calls for removal and replacement, use only plant-mixed, asphalt concrete unless other materials are accepted, in writing, by the District Executive. Under adverse weather conditions, temporary repair methods and materials may be used in remediation work, provided traffic safety and normal traffic patterns are maintained. Remove temporary repairs and perform permanent remediation work as soon as weather conditions permit. The Department’s notice to perform required remediation work, or the Department’s approval of the Contractor’s written proposal to perform elective or preventative maintenance work, shall serve as a right-of-entry that authorizes the work to be done, subject to time and location limitations contained in that notification, or those agreed to by the Contractor and the Department. Perform remediation work, including replacements, to meet the specified performance criteria indicated in Table A. Restore, according to Department specifications, all features removed and/or damaged during remediation work. Except for allowable crack sealing, as indicated in Table A, repair distress areas to the limits specified with square or rectangular patches using materials meeting the requirements of this specification and constructed to meet the construction end-result and performance criteria of this specification. Provide and maintain traffic control for operations involved in remediation work performed as part of the pavement warranty. Use the traffic control plan (TCP) provided in the original contract for remediation work, or submit an alternate TCP to the District Executive for approval. Submit alternate TCPs at least 14 calendar days before the start of remediation work. Alternate TCPs are to comply with the provisions of Publications 212 and 213, the MUTCD, and the contract special provisions. If the Department's written notification indicates that remedial action is required as part of the pavement warranty and the Department's performance survey results are disputed, notify the Department, in writing, within 30 calendar days from the date of the Department's written notification. Base disputes on appraisals of the performance survey results supplied by the Department. The Contractor may base a dispute on a third party appraisal of the performance results. If the Department and Contractor cannot resolve a dispute over remediation work within 14 calendar days from the date of the Contractor's written notification, the dispute will be submitted to the Conflict Resolution Team identified in Section 496.3(c)3. Remove material placed by the Department, during emergency repair work within warranted pavement areas and perform required remediation work if it is determined that the emergency repair was required due to faulty workmanship or construction. The Contractor may monitor or test warranted pavement course(s), using nondestructive methods, at any time during the warranty period. Notify the District Executive at least 7 calendar days in advance of any nondestructive testing. Provide all nondestructive test results to the Department for information. Obtain written authorization from the Department before conducting nondestructive Testing. Do not perform any remediation work without prior written notification from the Department. Submit a written proposal, to the District Executive, setting forth the reason(s) for performing elective or preventative remediation work not directed by the Department. The Department will review and approve or disapprove elective or preventative remediation work initiated by the Contractor within 5 calendar days from receipt of the written proposal. 3. Conflict Resolution Team. The Conflict Resolution Team (Team) will consist of two representatives selected by the Contractor, two representatives selected by the Department (District and Bureau of Project Delivery), and a fifth person mutually agreed upon by both the Department and the Contractor. Any costs incurred for the fifth Team member will be shared equally by the Department and the Contractor. The Team members, who will be identified at the pre-construction meeting, must be knowledgeable in the terms and conditions of the

Pennsylvania DOT Warranty Information F-7 warranty specification and the methods used in the measurement and calculation of pavement distress. Each Team member will have an equal vote and the decision of the majority will be final. If a change in the team is required the same selection procedure will be used as stated above. The Team will resolve disputes concerning defective work, warranted pavement performance, survey results, required remediation work, proposed alternate repair methods and material selection, and disputes over probable causes. The Team will meet and resolve disputes within 30 calendar days from the date of submission. 4. Probable Cause. The Department will furnish the Contractor with the results of performance surveys and traffic counts, noting those distresses considered to be caused by factors beyond the control of the Contractor. The Contractor will not be held responsible for meeting specified performance criteria or performing remediation work within these distress areas, which will be calculated by multiplying the maximum transverse width of the distress by the maximum longitudinal length. The area of non-responsibility will be defined as a square or rectangular area centered over and equal to 150% of the distress area, but extending no more than 10 feet on either side of the distress area. The Department may repair distresses determined to be caused by factors beyond the control of the Contractor using routine repair techniques. Factors beyond the control of the Contractor include the following: 4.a Base Condition. If performance surveys detect fatigue cracking or other distresses which might indicate an unacceptable base condition, a series of 6-inch diameter cores will be drilled within the distress area, as necessary, at locations directed by the Department. The Inspector will measure the depth of each core. The cores will be tested according to PTM No. 715 and AASHTO T-209 to determine the percent of unfilled voids, PTM No. 702 or other approved test methods to determine the percent bitumen, and PTM No. 739 to determine gradation. Have a Representative witness the testing. Test results will be provided to the DME/DMM. If the warranted pavement meets the specified minimum thickness, the density is 92% of theoretical maximum density and test results for percent bitumen and gradation are within the tolerances indicated in the Contractor's mix design(s), or if field evaluation clearly indicates base failure beyond the Contractor’s control, the Contractor will not be held responsible for repair of the distress and will be reimbursed, by the Department, the total cost of the testing. Should these criteria not be achieved, further investigation may be necessary to determine the cause of the distress. 4.b Traffic Loadings. If, during the warranty period, the Department's traffic counts indicate that estimated cumulative ESALs have exceeded 100% of the estimated 20-year design life ESALs or if the ESAL’s increase enough to warrant a change in the mix design in the number of gyrations, the Contractor will not be held responsible for repair of rutting or base condition distresses for the remainder of the warranty period. 4.c Routine Maintenance by the Department. During the warranty period, the Department will perform routine maintenance such as snow removal, application of anti-skid material and/or de-icing chemicals, repairs to safety appurtenances, application and maintenance of pavement markings, mowing, and sign maintenance. Routine pavement maintenance activities, such as crack sealing, pothole patching, or milling, will not be performed by the Department during the warranty period. 4.d Destructive Procedures by the Department. The Contractor will not be held responsible for repair of distresses caused by coring, milling or other destructive procedures performed by the Department. 4.e Uncontrolled Forces of Nature. The Contractor will not be held responsible for repair of distresses caused by floods, earthquakes, tornadoes, brush or forest fires, landslides, sinkholes, or other natural disasters. 4.f Traffic Accidents. The Contractor will not be held responsible for repair of distresses caused by traffic accident- related fuel or chemical spills, vehicle fires, and/or gouging or goring of the pavement surface unless the Contractor or its representative is the cause of the distress. 5. Final Warranty Inspection. At the end of the warranty period, and when any remediation work, if required, is substantially complete (at least 90%), make arrangements for a mutual final warranty inspection. At the time of final warranty inspection, the Representative, along with the Contractor, will establish the following: • The list of all physical work items requiring completion and/or correction; and • A list of all documents requiring submission, completion, and/or correction.

F-8 Performance-Based Pavement Warranty Practices As established during the final warranty inspection, perform work as necessary for required correction or completion of all physical work items, and complete, correct, and submit all outstanding documents. 6. Release from Warranty. To be released from warranty responsibility, satisfy all of the following: • Meet minimum requirements for each of the specified performance criteria through the end of the warranty period, • Complete all required remediation work identified during the warranty period at no additional cost to and to the satisfaction of the Department, and • Submit all required warranty documents. When the warranty period has expired, all physical remediation work has been satisfactorily completed, and all required warranty release criteria have been met, the Representative will establish the date of physical warranty work completion; the date on which the Contractor will be relieved of responsibility for further physical remediation work and maintenance on the project or any substantial project section. Upon receipt and verification, the Representative will establish the date that all required warranty documents are satisfactorily furnished. When all physical remediation work has been satisfactorily completed and all contractually required warranty documents have been properly furnished, the date of warranty project acceptance will be established. If the warranty period for a substantial project section expires in advance of the whole, a final warranty inspection will be made of that section, as specified for the entire project, and the Contractor notified, in writing, that the warranty terms for the specific section of the project have been satisfied. No further remediation work will be required on the section as specified in Section 108.04(b). The Contractor will then be allowed to reduce their warranty bond proportionately. 7. Warranty Acceptance Notification. Upon completion of the requirements of Section 496.3(c)6, a Warranty Acceptance Notification will be issued indicating that the project warranty has been satisfactorily completed and certifying that the project is accepted as of that date. 8. Warranty Default and Termination of Contract. As specified in Section 108.08 and as follows: • Failure of the Contractor to perform remediation work within the time specified. 496.4. MEASUREMENT AND PAYMENT— (a) Asphalt Concrete Pavement, 60-Month Warranty. Square Yard Payment will be made, as specified in Section 110.05, as work progresses, based on the quantity of each separate pavement course placed meeting specified construction criteria. The Inspector will measure the quantity of each pavement course placed, on a daily basis, and compute the payable quantity by multiplying the measured area by a factor equal to the depth of the pavement course being placed divided by the total, indicated pavement depth. The placement depth will be determined as indicated in Section 496.3(a). No additional payment will be made for pavement depths in excess of the total, indicated depth. (b) Asphalt Concrete Pavement, 60-Month Warranty, Warranty Bond and Liability Insurance. Lump Sum