Case 2: Does this justify excavation?

Case input / evidence

Client issue

Recurring blockages.

Surface-water run MH1→MH2: 300mm PVC, 17.03m, no defects reported.
Foul run MH2→MH3: 100mm PVC, 10m, asphalt surface.
Observations: WL at 3.55m, connection at 3.62m, open joint at 4.12m, CMJ at 5.02m.
Survey grades: Structural grade 3, service grade 2.

Important uncertainty

The survey purpose says routine inspection, while the narrative says recurring blockages.

Proposed remedial plan

Additional job context

Optional - add a real-world constraint or client preference. For example: The affected drainage runs are beneath a newly laid patio. Avoid excavation if a technically suitable internal repair is available.

How this works

This plan is generated live from the case facts shown here, the additional job context you provide, and a small set of publicly sourced drainage repair principles. The model is not given the contractor’s published recommendation.