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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchBefore approving a road-work payment, match every billed quantity to the measurement method in the signed contract, independently check its supporting records and calculations, and reconcile the result against previous estimates and authorized changes. The contract’s incorporated specifications and amendments—not a generic checklist—determine what quantity is payable and what evidence is required.
Start with the contract and the version that governs
Gather the executed contract, bid schedule, drawings, addenda, special provisions, incorporated standard specifications and edition, amendments, and approved change orders. For each billed item, locate its measurement-and-payment clause before checking its quantity. Identify the specified unit and basis: for example, count, length, area, volume, weight, plan quantity, lump sum, or another contract-defined method.
Check the contract’s limits, measurement point, material state, required records, conversions, rounding rules, and acceptance conditions. Do not substitute a convenient method—such as using delivery tonnage for an item paid by measured volume—unless the contract permits it. Caltrans’ March 2024 Construction Manual puts the point plainly: “A change in the unit or the method of measurement changes the contract.” California Department of Transportation, Construction Manual, Section 3-902A.
Use the specification edition incorporated into this project, not automatically the latest edition available online. The UK Standards for Highways portal explains that the standards applied to a scheme are set by the contract date and may differ by overseeing organisation; its Manual of Contract Documents for Highway Works was modernized and republished in September 2025. Standards for Highways, Manual of Contract Documents for Highway Works. The same version-control principle matters wherever contract documents incorporate a particular edition.
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Set up a line-by-line payment reconciliation
For every estimate or invoice line, compare the submitted item and amount with the bid schedule and the project’s cumulative quantity records. A useful reconciliation captures:
- Pay-item number and description, contract unit, and contract rate or other pricing basis.
- Current-period quantity and amount, prior cumulative quantity and payments, and cumulative quantity to date.
- Any stated retainage, deduction, withholding, or partial-payment assumption.
- The source record for the current quantity and the link from that record to the cumulative total.
Make sure the current-period quantity reconciles to the supported cumulative quantity after accounting for prior estimates, corrections, and authorized changes. A supplier invoice or truck ticket may support a calculation, but it does not by itself prove an installed quantity; whether it establishes the payable quantity depends on the item’s contract method.
Check that the quantity has a traceable source
For measured work, obtain the dated field notes, measurement or survey sheets, inspector daily reports, calculations, and relevant delivery or scale tickets. The source record should make it possible to determine what was measured, where and when, by whom, in what unit, and how the total was calculated. It should identify the preparer and checker where required and connect the estimate quantity to the underlying measurements.
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Independently redo the calculation rather than checking only the submitted total. Verify the dimensions, formula, arithmetic, unit conversions, rounding convention, dates, location or station limits, duplicate entries, gaps, and whether the measured work falls within approved scope. Caltrans calls for permanent source documents, an independent calculation check, and an audit trail from the final pay quantity back to the first measurement or calculation. Caltrans Construction Manual, Section 9: Payment.
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Caltrans describes a general quantity-accuracy target of 0.2% to 0.5% in its California practice, with accuracy consistent with the unit price. This is agency guidance, not a universal tolerance or automatic allowance for discrepancies. Caltrans Construction Manual, Section 9: Payment.
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Match the evidence to the payment unit
- Weight: Compare tickets with the specified certified scale or process. Check dates, load identifiers, gross, tare, and net values where relevant, and connect loads to the item and placement records.
- Count: Reconcile the claimed total with inspection or installation logs and check for duplicate or out-of-scope entries.
- Length, area, or volume: Verify measured dimensions, limits, formula, and the contract’s basis for measurement.
- Plan quantity, lump sum, or another special basis: Apply the specific clause and required progress or acceptance evidence rather than imposing a field-measurement method the contract does not require.
Reconcile the estimate against other project records
Compare the contractor’s estimate and quantity records with agency quantity records, inspector daily reports, materials records, test reports, delivery or weight tickets, receipts, invoices, and approved change documentation where applicable. These records need not all determine payment in the same way: use them as cross-checks appropriate to the item and contract.
FHWA’s review worksheet puts quantity sources alongside project records and recommends selecting a cross-section of items for thorough review. Its guidance is an audit-structure example, not a substitute for current local requirements: the page was updated June 27, 2017, is titled “Measurement and Payment Procedures 1 – Generic Reviews,” and references older agency documents. FHWA, Measurement and Payment Procedures 1 – Generic Reviews. When records disagree, investigate and document the difference instead of silently netting quantities.
Apply the right treatment to plan quantities and changed work
Plans-quantity items
Some contracts specify that a bid item is paid as a plans quantity under a defined provision. TxDOT’s manual says actual field measurement is not required for an item identified as a plans-quantity measurement item; progress estimates may use plan quantities or an established and agreed formula, such as a percentage of installed plan quantity. That is a Texas-specific example. Use it only when the project’s own contract contains the corresponding provision. TxDOT Construction Contract Administration Manual, Chapter 11.
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Change orders, extra work, and quantity changes
Check quantity overruns, underruns, revised scope, and extra work against the contract’s change and payment clauses. Confirm that required approvals and the payment basis are documented. Caltrans states that change-order work will not be paid until the change order is approved; that is its agency procedure, and the applicable project contract and governing process control elsewhere. Caltrans Construction Manual, Section 9: Payment.
For force-account or other extra work, review the separate authorization, daily records, signatures, and pricing basis required by the contract. FHWA’s worksheet includes change orders, work orders, supplemental agreements, and force-account documentation among records to examine. FHWA review worksheet.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Confirm the work is eligible for the proposed payment
Verify that the work has reached the completion stage required for the estimate and meets contractual acceptance and quality conditions. Compare the supported current quantity with cumulative quantities already paid, then check any stated deductions, withholds, and partial-payment assumptions. Caltrans describes progress estimates as covering satisfactorily completed contract work and requires source documentation for unit quantities. Caltrans Construction Manual, Section 9: Payment.
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TxDOT summarizes its agency objective as ensuring the contractor completes work under the contract and is paid according to the amount performed, with enough documentation to support quantities paid. TxDOT Construction Contract Administration Manual, Chapter 11, Section 1.
Resolve exceptions and preserve the record
If a line has missing source records, conflicting measurements, an unexplained cumulative increase, an unclear approval, or an unsupported conversion, list the exception and seek the required clarification or correction. Record the line, submitted amount, amount currently supported, missing or conflicting evidence, question raised, and eventual disposition. Request corrected calculations, source records, or the required authorization as appropriate, and retain the reconciliation, correspondence, source records, and revised estimate in the project file.
Whether a reviewer may withhold, reject, or condition a payment—and what notice or process is required—is specific to the contract, jurisdiction, and reviewer’s authority. This review framework is not a legal determination about any particular bill.
Quick Recap
Documents to have at hand
- Executed contract, bid schedule, drawings, addenda, incorporated specification edition, special provisions, and amendments.
- Current and prior payment estimates, payment history, retainage and deduction schedule, and approved change orders.
- Relevant quantity sheets, survey records, daily reports, inspection notes, calculations, and dated photographs where useful.
- Scale or delivery tickets, receipts, material records, test results, and invoices where they relate to the contract’s payment method.
- Independent recalculation showing the formula, units, conversions, rounding, and extension.
- A cross-reference connecting each estimate quantity to its source record and cumulative total.
- Written exception notes, support requests, corrections, correspondence, and final disposition.
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