R73 Pavement ITP Review: The Gap Found Before Paving Started

An ITP for Heavily Bound Base (HBB) pavement works under TfNSW R73 arrived for review. Ten activities, multiple Hold Points, and references to R73 and TfNSW 3051 throughout. From a quick read it looked thorough.

A structured review against R73 Annexure C1 — the mandatory HP/WP schedule — found one gap that a manual review would almost certainly have missed: the trial section Witness Point was absent.

Not significant on its own. But if paving started and the trial section was constructed without notifying the Principal, the contractor would have proceeded past a mandatory Annexure C1 item. The opportunity to witness the trial section — and the 3-working-day window that comes with it — would be gone.

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The R73 HP/WP Schedule

TfNSW R73 Annexure C1 lists ten mandatory Hold Points and Witness Points for plant-mixed heavily bound pavement. The review systematically checked each one against the submitted ITP.