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DOT presenters emphasize IA testing, documentation and final materials acceptance
Summary
Bismarck district staff reviewed independent assurance (IA) testing requirements for federal‑aid projects, sampling frequencies, aggregate quality summaries, forms for project acceptance and the requirement to store materials records in the department Dropbox.
Adam, ND DOT materials staff (Bismarck District), reviewed materials testing documentation requirements, IA testing frequencies and final acceptance paperwork on Oct. 11, 2025.
Adam said IA testing is mandatory on all federal‑aid construction projects and urged project teams to coordinate IA sampling with the district lab and materials coordinator during pre‑job meetings. He directed attendees to the department’s Field Sampling Testing Manual for IA frequencies and concrete/aggregate testing tables and recommended preparing a checklist of required tests before work begins so sampling, testing and IA submittals are not missed.
The presentation covered the Aggregate Quality Test Summary and common formatting issues: use the bid item title as shown in the contract, record COA or legal pit identifiers rather than informal pit names, follow specified decimal rounding from the sampling testing manual and list sample dates in chronological order. Adam demonstrated how averages and comments (for example, when a contract adjustment was applied) should be recorded to clarify final pass/fail outcomes for lots.
He explained project acceptance steps: the CARs‑generated project engineer’s report auto‑populates many fields and can be easier than the static form on the DOT forms page; after final testing and approval, the contractor’s final acceptance letter and combined materials/project acceptance letter are prepared and routed to the district materials coordinator for approval. Adam closed with a clear instruction about records: “If it isn't in Materials Dropbox, it didn't happen.”
Attendees were reminded to file IA and QA/QA results, shop drawings, certifications and final acceptance letters into the Materials Dropbox to support the final checklist and combined acceptance letter process.
