A Plan/Spec Conflict, a Verbal Change, and a Quantity Discrepancy
During a 2.1-mile municipal street reconstruction you are the owner's full-time inspector. Plan sheet C-5 shows 6 inches of topsoil in the boulevard areas; Special Provision SP-204 requires 4 inches. The contractor placed 4 inches and is billing the full topsoil item, arguing the special provision governs. Separately, the plan quantity for the HMA base is 1,850 tons, but your own takeoff from the plan dimensions comes to about 2,030 tons. Then the superintendent leaves a voicemail on Friday: 'We're shifting the underdrain 18 inches toward the centerline because it conflicts with the abutment footing excavation,' and a crew starts digging at 7 a.m. Monday. You maintain the daily reports, the RFI log, and photo documentation.
1. The contractor placed 4 inches of topsoil and wants it accepted and paid. How do you resolve the conflict, and what goes in the record?
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Recognize it as a document conflict, not a field judgement. Neither the contractor nor the inspector gets to pick a winner unilaterally.
Apply the contract's order-of-precedence clause. A typical hierarchy is: written changes/supplemental agreements, then special provisions, then standard specifications, then plans, then standard drawings. Under that clause SP-204 governs and 4 inches is likely correct - but only the engineer/owner can confirm it.
Get it in writing. Issue an RFI or field clarification request the same day, reference the sheet and the SP paragraph, and state the question as a request for direction, not a recommendation.
Record: date/time the conflict was found, who was notified, RFI number, area and location of placed topsoil, measured thickness and quantity, and photos with a scale. If 6 inches is later directed, that is a change order; if 4 inches is accepted, note the reduced quantity so the pay estimate is not overstated.
2. The superintendent's voicemail about moving the underdrain 18 inches - what is your response, and why does the 18 inches matter?
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A voicemail from a contractor is not a change. Only the owner/engineer can direct work outside the contract documents, and only in writing.
Act before 7 a.m. Monday: notify the engineer immediately, and if the crew starts, issue a written field directive to stop that portion of work. Document the voicemail (time, number, content) in the daily report.
Why 18 inches is not trivial: an 18-inch shift changes the flowline elevation and grade if the pipe no longer lands on the designed slope, can move the structure off the inlet/outlet alignment, changes the tributary drainage and the hydraulic capacity check, and may put the pipe inside the footing excavation's influence zone (bearing, side slopes, backfill compaction). A conflict that is real still needs a designed fix - a bend, a structure relocation, or a revised profile.
Inspector's role: enforce the contract, document the conflict, and request a design solution. Do not author, sketch, or verbally bless a field fit.
3. Your takeoff shows 2,030 tons of HMA base against a plan quantity of 1,850 tons. How do you handle quantities and payment?
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Plan quantities are estimates; payment is for the actual measured quantity at the contract unit price, unless the item is lump sum.
Measure and verify. Reconcile weigh tickets and truck counts against computed area times spread rate. Check the tickets against the plan area and the specified depth (a 10% overrun over this area can come from depth, width, or waste at the joint).
Flag the overrun early. Notify the engineer so the overrun is tracked against any variations-in-quantity clause; a large overrun can trigger a unit-price adjustment or a change order. Do not let a ticket total quietly establish the pay quantity.
Document: the takeoff basis (stations, widths, depths), the ticket summary, the date of the comparison, and the engineer's response. Keep the takeoff and ticket reconciliation in the project file so the final estimate rests on measured, documented quantities, not on a plan figure or a contractor's summary.