109.01 Measurement of Quantities.
The Engineer will measure the contract pay item quantities, except for items that require the Contractor to provide survey measurement as specified in 675, using the units of measure specified in the contract and the methods of measurement and calculation as specified in this section . The U.S. customary system of weights and measures units is defined in 15 CFR. Unless otherwise agreed upon by the Engineer, progress payments will not be issued for items requiring survey measurement until the Engineer has received a statement of quantities, along with supporting documentation and calculations, signed and sealed by a licensed Idaho professional engineer or professional land surveyor. Measurements will be rounded as specified in Table 109.01-1 , unless otherwise specified . Table 109.01- 1 – Standard Rounding Pay Unit Rounding Acre / Acre Unit (AU) 0.001 Contingency Amount (CA) 0.01 Cubic Foot (CF) 0.1 Cubic Yard (CY) 0.1 Day 1 Each 1 Foot ( FT) 0.5 Gallon (gal) 1 Hour (hr) 0.5 Lump Sum (LS) 0.001 Mile 0.01 Month 1 Pound (lb) 1 Square Foot (SF) 0.1 Square Yard (SY) 0.1 Station (Sta) 0.01 Thousand Feet Board Measure (MFBM) 0.001 Thousand Gallons (MG) 1 Ton 0.01 For standard manufactured materials identified by gauge, thickness, unit weight, or section dimensions, the Department will consider these as nominal weights and dimensions, and accept industry established manufacturing tolerances. The Engineer will measure contract pay item quantities by the actual quantity or by the plan quantity, as required by the contract. for Highway Construction Page 99 of 715 A. Actual Quantities . Where the contract specifies actual quantity as the basis of payment for a contract pay item, the Engineer will measure and calculate the actual work quantity performed, using quantities from measurements taken from the completed work in place or from measurements taken from delivery vehicles. This excludes work outside the project site as specified in the method of measurement section for the relevant contract pay item. The Engineer will measure the actual contract pay item quantities using the following methods:
1.Area. The Engineer will calculate area measurements from linear distances measured horizontally or vertically. The measurement will be the neat lines as specified or ordered in writing. The Engineer will not deduct for individual fixtures occupying areas less than or equal to 9 square feet.
2.Structures . The Engineer will measure structures using the neat lines as specified or ordered in writing.
3.Linear. The Engineer will measure linear measurements as follows:
a.By the foot will be measured parallel to the surface on which the work is installed.
b.By the mile will be measured using project stationing. For materials manufactured in standard lengths, the Engineer will calculate the length measurement by multiplying the number of pieces by the nominal length.
4.Lump Sum or Each. Consider lump sum or each payment as full payment for labor, equipment, material, and incidentals, including fittings and accessories, necessary to complete the work on a contract pay item or other work element.
5.Volumes of Excavation, Embankment, and Similar Contract Pay Items . The Engineer will measure volume quantities using specific volumetric measurements as specified in the method of measurement section for the relevant contract pay item.
6.Volumes and Weights in Hauling Vehicles. The Engineer will measure material delivered in trucks by the cubic yard or by weight. Haul material in approved trucks. Display a unique identification mark on each truck. Ensure loads in the truck box are empty before leaving the drop site.
a.Cubic Yard. If the contract does not require otherwise, the Engineer will measure contract pay items with cubic yard pay units using trucks with calculated struck volumes as the method of measurement. The Engineer will measure volume at the point of delivery. Hauling units may be of any size or type acceptable to the Engineer, provided the unit’s body is shaped to enable an expeditious and accurate determination of the volume. The Engineer will calculate the struck volume of each truck to the nearest 0.1 cubic yard. This volume will not change without approval. The Engineer will not make allowances for the material settlement in transit. For material delivered in trucks, the Engineer will not pay for material above the struck volume of the truck for Highway Construction Page 100 of 71 5 box and will re duce the calculated truck box struck volume by 0.5 cubic yard increments when the truck is not filled to its struck volume.
b.Weight. Comply with 71- 113, Idaho C ode and IDAPA 02.02.14.450 . For material measurement based on scale tickets, ensure that scales used to weigh materials include a controller capable of printing a weight ticket that indicates the project name, project number, contract pay item number, current date, current time, load number, truck number, load gross weight, load tare weight, and load net weight. Ensure the scale controller can automatically print th e date, time, and weights without modification of the weight ticket. Assign sequential load numbers for each load weighed for delivery. If paying for granular borrow or aggregate by weight, the Engineer will not pay for water over 7 percent of the material’s dry weight. The Engineer will correct material weight for excess moisture content in accordance with AASHTO T 255. Weigh empty trucks at least once a day if used to haul material paid by weight. Ensure the scal e’s accuracy to within 1 percent. Weigh materials proportioned or measured by weight on beam or springless dial scales as follows:
1.Ensure the scale springs do not carry any part of the load.
2.Provide a commercial certificate of compliance for weighing equipment before hauling operations begin. The certificate cost is incidental to the weighed material contract pay item.
3.Provide clearance between the scale parts and the structure to prevent scale part displacement.
4.Protect scale working parts to prevent material from falling on or against the parts.
5.The Department will allow the weighing of separate units of combination vehicles if the scale platform and approaches are at the same elevation, and can maintain units of the combinat ion vehicles at the same elevation during the weighing operation.
6.When weighing each vehicle, take the tractor unit out of gear and release the brakes.
7.Ensure plants used to proportion or batch materials by weight operate as follows:
a.The operator can fully view the graduated scale when operating the gate that delivers material to the weighing hopper.
b.Locations of hoppers and bins allow access for calibration.
c.Inspect and calibrate platform scales as directed. Instead of platform scales, the Department will allow the use of conveyor weighing equipment that meets the requirements of the Idaho State Department of Agriculture, Bureau of Weights and Measures. The Contractor will inspect conveyor weighing equipment for calibration, at least every 7 calendar days, in accordance with the manufacturer’s written requirements. Obtain written approval to use automatic weighing equipment. Ensure the material weighing accuracy is wit hin 1 percent of actual. for Highway Construction Page 101 of 71 5 The Engineer will not pay for wasted or rejected material, material not delivered, material placed outside of the specified or directed project locations, and material left on hand after work completion.
7.Converting Between Weights and Volumes. The Engineer may convert minor quantities specified for measurement by volume or weight from one measurement to the other if the Engineer and the Contractor agree to the conversions. The Engineer will determine the factors to be used for these conversions, and the Engineer and the Contract or will agree on these conversions before proceeding with the relevant work.
8.Asphalt Material. The Engineer will measure asphalt and anti -stripping addi tive, at 60°F or converted to 60°F, by the gallon or ton. The Engineer will use certified net weights or weights based on certified volumes as the measurement basis when measuring asphalt shipped by rail, truck, or transport, corrected for material lost, foamed, wasted, or not incorporated in the work. The Engineer will measure anti - stripping additives by the percentage of additive per ton of asphalt.
9.Commercial Additives. The Engineer will measure bulk additives by the ton and additives in sacks by the net weight on the manufacturer’s lab el.
10.Timber. The Engineer will measure timber incorporated in the structure by the thousand feet board measure (MFBM), based on nominal widths and thicknesses, and the longest dimension of each piece.
11.Equipment Time. The Engineer will measure equipment time by the actual number of hours the equipment is operated to perform the work, including necessary travel time.
12.Water. If specified as a separate contract pay item in the contract, the Engineer will measure water separately using calibrated tanks, distributors, or water meters.
13.Stockpiled Material. The Engineer will determine stockpiled material volume using the cross -section, average- end-area method. For quantities less than 100 cubic yards, the Engineer may use trucks with calculated struck volumes as the method of measurement.
B.Plan Quantities . If the contract requires plan qua ntity as the basis of payment for a contract pay item, the Engineer will base payment for the work on the quantity shown. The Engineer will not make measurements for contract pay items paid by plan quantity, except if the Engineer changes the plan quantity as specified in 104.02. If the Engineer believes the actual contract pay item quantity to be paid by plan quantity differs significantly from the plan quantity, the Engineer will measure and pay for the actual work quantity performed at the contract unit price. If the Contractor believes the actual contract pay item quantity differs significantly from the plan quantity, submit a written request for actual quantity measurement. If the actual measured quantity value does not exceed the plan quant ity value by $2,000, reimburse the Department for the measurement cost. for Highway Construction Page 102 of 71 5 109.02 Scope of Payment .
A.General. The Department will pay the Contractor for accepted contract pay item quantities at the contract unit prices, except as otherwise specified in 104.02, 109.03, 109.06, and 109.08. Accept this payment as full payment for providing the necessary materials, labor, tools, equipment, and incidentals to perform and complete the work as required by the contract . Assume liability for risk, loss, damage, or expense resulting from the work, subject to 107.14.
B.Price Adjustment . The Department will consider pr ogress es timate adjustments to applicable contract item costs as a payment to the Contractor, or a credit to the Department, when the indexes change as defined for asphalt and fuel. For the current asphalt index (CAI), the Department will publish the index value on the first Monday of each month (an additional day will be allowed if the first Monday is a Holiday); the CAI is based on the previous month's average as reported by Poten & Partner s, Inc. f or the Boise area. For the current fuel index (CFI), the Department will publish the value on the first day following the first Monday of the month (an additional day will be allowed if the first Monday is a Holiday); the CFI is based on the price of ultra -low sulfur, clear, and diesel #2 fuel, as reported by Oil Price Information Services. The contract base asphalt index (BAI) and base fuel index (BFI) will be the last posted index amount preceding the bid opening date. A payment to the Contractor will be applied or a credit to the Department will be deducted from monies due the Contractor for each affected progress estimate. Work performed at no expense to the Department will not be el igible fo r an adjustment. Compute the price adjustment using the Department’s form (e.g., ITD -2624, ITD-2625).
1.Computing the Asphalt Price Adjustment . A price adjustment will be made only when the CAI varies by more than 10 percent from the BAI and only for that portion of the variance in excess of 10 percent. Credits and payments are computed as follows:
a.The tons of asphalt used during each progress estimate period will be computed for applicable contract items. The plant mix asphalt quantity used, when the item includes asphalt and additives, will be calculated at the approved contractor job mix formula (C -JMF) percentage. Asphalt binder contained in RAP is not eligible for an asphalt price adjustment (APA). Only virgin asphalt binder in the mix will be e ligible for an AP A. The APA for emulsified asphalt products will be calculated based on the percentage of asphalt in the emulsion, which is estimated at 65 percent and 32.5 percent for diluted emulsion.
b.The total asphalt tons used for each progress estimate period will be summed for the applicable contract items.
c.The APA credit or payment is computed from the following formula: Contractor payment if CAI is greater than 110% of BAI: APA = (CAI – 1.10 BAI) * Q * (1+T) Department credit if CAI is less than 90% of BAI: for Highway Construction Page 103 of 71 5 APA = (CAI – 0.90 BAI) * Q * (1+T) Where: APA = Asphalt price adjustment in dollars. BAI = Base asphalt index. CAI = Current asphalt index. Q = Total asphalt tons used for the progress estimate. T = Current applicable sales tax rate (percent expressed as a decimal) If the CAI increases by 50 percent or more over the BAI, the Department will determine the feasibility of continuing project construction. The Engineer will notify the Contractor in writing if the contract will be terminated as specified in 108.10. This adjus tment will be applied only to a material that is accepted and allowed to be left in place.
2.Computing the Fuel Price Adjustment . A price adjustment will be made only when the CFI varies by more than 20 percent from the BFI, and only for that portion of the variance in excess of 20 percent. Credits and payments are computed as follows:
a.The Engineer will obtain the work quantity performed from the progress estimate for the applicable contract items based on the categories in Table 109.02- 1.
b.Compute the fuel usage for each applicable contract item by multiplying the fuel usage rate by the work quantity performed for each item.
c.Sum the total fuel usage in gallons (Q) for the applicable contract items.
d.Compute the fuel price adjustment (FPA) credit or payment using the following formulas: Contractor payment if CFI is grea ter than 120% of BFI: FPA = (CFI – 1.20 BFI) * Q Department credit if CFI is less than 80% of BFI: FPA = (CFI – 0.80 BFI) * Q Where: FPA = Fuel price adjustment in dollars. BFI = Base fuel index. CFI = Current fuel index. Q = Total fuel gallons used for the progress estimate. When the work under the contract is complete, the Engineer will reconcile final quantities adjustments over or under the estimated quantities paid in the pr ogress estimates as follows: for Highway Construction Page 104 of 71 5 a. Calculate an average CFI of the CFI’s from individual pay estimates to which a FPA was applied.
b.Determine the difference between estimated quantities and final quantities for each applicable work item.
c.Calculate the final FPA by multiplying the applicable average CFI (a.) by the difference in work quantities (b.) by the fuel usage rate. The final FPA will be paid or deducted on the final progress estimate. Table 109.02- 1 – Fuel Usa ge Rates Item Category Description Rate: Gal/Unit Excavation, including topsoil 0.29 / CY Excavation – Rock (must be specifically identified in the contract) 0.39 / CY Borrow 0.29 / CY Base 0.63 / Ton Surface treatments, including seal coats 0.02 / SY; 1.47 / Ton Concrete Pavements 0.03 / SY / inch of depth Concrete (paid by the cubic yard) 0.98 / CY Plant Mix Pavement 2.6 / Ton Piling Driving 0.12 / FT Rotomilling 0.02 / SY Pulverizing / Mixing 0.02 / SY plus 0.015 / SY / FT of depth Pilot / Pace Car, Pipe, Guar drail 19.0 / $1,000 MSE Retaining Wall 19.0 / $1,000
109.05 Partial Payments.
Partial payments are only approximate and are subject to correction in any payment following the discovery of an error. Partial payments will be made at least once each month as the work progresses and only if the Contractor performs work in accor dance with the contract or as directed. Semi -monthly payments will be made upon the Contractor’s written request. The Engineer will pr epare estimates and partial payments will be made based on the value of the work performed and for material delivered and on hand as specified in 109.06. The Engineer may withhold part of a pay estimate until the Contractor complies with the contract , including:
1.Submitting schedules as specified in 108.03.
2.Correcting defective, deficient, or incomplete work.
3.Maintaining completed work or correcting deficiencies resulting from the Contractor’s failure to provide proper maintenance. for Highway Construction Page 113 of 71 5 4. Submitting materials certifications.
5.Submitting certified payrolls.
6.Complying with storm water management practices.
7.Making prompt payment to subcontractors or suppliers as specified in 101.04.
8.Participating in the online diversity tracking system and verifying subcontractor and supplier prompt payments by the online audit process.
9.Meeting the training special provisions, if required.
10.Submitting record drawings. If the Engineer or the Contractor discovers defective work or material or an overpayment based on quantity or unit price, or if the Engineer reasonably doubts the integrity of the completed work before the final acceptance and payment , the Engineer will deduct an amount equal to the value of the defective work or overpayment. The Engineer will not include this amount in subsequent estimates until the Contractor corrects the defect or addresses the Engineer’s doubt. The Engineer will determine the suspect or defective work value or overpayment using the quantities or unit prices in the contract . Pay each subcontractor or supplier by the 20th day after receiving payment from the Department, provided work performed by the subcontractor or supplier complies with the contract. Return retainage to each subcontractor or supplier by the 20th day after the subcontractor or supplier satisfactorily completes work . The subcontractor may request the Engineer to make partial acceptance of the completed work to allow release of subcontractor retainage from the Contractor. For purposes of this section, a subcontractor’s work is satisf actorily completed when all the work in the subcontract has been accomplished and documented as required by the Department and as specified in 105.15. When the Department has made a partial acceptance of the subcontractor’s work, the partial acceptance indicates this work satisfactorily comp leted and requires the Contractor to release any retainage. The Contractor will verify payment or retainage has been released to its subcontractors or suppliers within the specified time for each partial payment or partial a cceptance by the Department through entries in the Department’s online diversity tracking system during the corresponding monthly audits . Prompt payment will be monitore d and enforced through the Contractor’s reporting of monthly payments to its subcontractors and suppliers in the online diversity tracking system. Subcontractors, including lower -tier subcontractors and/or suppliers will confirm the timeliness and the payment amounts received utilizing the online diversity tracking system. Discrepancies will be investigated by the Contract Compliance Officer and the Engineer. Payments to the subcontractors, including lower -tier subcontractors, and including retainage release after the subcont ractor or lower -tier subcontractor’s work has been accepted, will be reported monthly by the Contactor or the subcontractor. The Contractor will ensure its subcontractors, including lower -tier subcontractors, and its suppliers meet these requirements. As work progresses, payment will not be made on any pay item or portion thereof as specified in 109.05, until all acceptance documentation (e.g., material certifications, test results) and quantity calculat ions have been received and verified by the Department. Acceptance documentation and quantity measurement will be in accordance with the contract
109.07 Allowance fo r Material Left on Hand.
If materials are not incorporated into the work because of contract pay item elimination, contract revisions as specified in 104.02, termination of the contract for the Department’s convenience as specified in 108.09, and it is not commercially feasible for the Contractor to return the material for credit or otherwise dispose of the material, the Department will purchase the materials provided the Contractor:
1.Requests the Department purchase the unused materials.
2.Shows acquisition of the applicable materials as specified in 106.02.
3.Shows the materials meet specifications.
4.Submits receipts, bills, and other records of the cost of materials delivered to the designated delivery points. The Department will pay the Contractor the verified materials cost plus 5 percent, unless the payment would exceed the contract unit price. If the payment would exceed the contract unit price, the Department will pay the contract unit pri ce. The Department may purchase surplus aggregates from the Contractor if the following conditions exist:
1.The material is stockpiled as directed.
2.The material meets specification requirements when stockpiled. The Department will pay the Contractor for accepted material at an agreed price based on the material production cost. The Department will pay the Contractor to haul the material to the stockpile site as specified in 104.02.
109.08 Acceptance and Final Payment .
The Contractor will have 20 business days after the last charged contract day and notification by the Engineer to submit outstanding documentation on completed work or the Contractor will receive a pay reduction for failure to submit documentation for the applicable pay item(s) as documented on a change order . After accepting the work as specified in 105.16, the Engineer will prepare a final estimate including the following:
1.All accepted contract pay item quantities and unit prices.
2.All previous partial payment amounts.
3.Release of remaining retainage.
4.Deductions made as specified in the contract . When the Contractor accepts the final estimate and submits consent of surety, the Engineer will process the final estimate and the Department will provide the Contractor with final payment . Submi t a consent of surety letter signed by the attorney -in-fact for the surety with the wording: “As surety for the above referenced project issued a perform ance bond and in accordance with 54- 19, Idaho Code and the Department’s Standard Specifications, the surety agrees and guarantees for Highway Construction Page 115 of 71 5 under the performance bond, to promptly repay the Department for overpayments made to the surety’s principal and tax claims made pursuant to 63- 15, Idaho Code, signed by the attorney -in-fact for surety, to the Engine er.” If the Contractor has not accepted the final estimate and submitted the consent of surety within 30 calendar days, the Engineer may process the final estimate and the Department will provide the Contractor with final payment . The Contr actor’s final payment acceptance will not prejudice pending claims filed as specified in 105.16 . On final adjudication of outstanding claims, the Department will process additional Contractor payments as required. The Department may correct prior partial estimates and payments in the final estimate and payment . for Highway Construction Page 116 of 71 5 SECTION 110 – CIVIL RIGHTS
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 134–151 of 768.