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Inspection des infrastructures civiles 19 points

Underwater & Scour Bridge Inspection

Cette liste de contrôle est en anglais.

Underwater (dive) inspection of submerged substructure and channel documenting scour, undermining, and foundation condition below the waterline.

NBIS 23 CFR 650 Subpart CFHWA HEC-18 Evaluating Scour at BridgesAASHTO Manual for Bridge Evaluation

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Dive Setup & Qualifications

  • Is the underwater inspection within the assigned interval (max 60 months or risk-based)? *
  • Is the dive team qualified for the assigned bridge inspection dive level (I/II/III)? *
  • Was a dive safety plan and surface communication in place before entry? *
  • Date of inspection *
  • Water depth and estimated visibility at time of dive

Channel & Streambed

  • Channel and channel protection condition rating (0-9) *
  • Is the streambed profile consistent with prior soundings without new scour holes? *
  • Is channel protection (riprap, articulated block, gabions) in place and stable?
  • Is debris accumulation or channel migration threatening the structure?

Submerged Substructure

  • Are submerged pier and abutment surfaces free of undermining or exposed footings? *
  • Is concrete free of significant deterioration, spalling, or exposed reinforcement below the waterline? *
  • Are timber/steel piles free of marine borer damage, corrosion, or section loss at the mudline?
  • Measured scour depth at deepest point relative to footing (feet)

Scour Evaluation & Plan of Action

  • Scour critical bridges rating (Item 113) confirmed consistent with field findings? *
  • Is a Plan of Action (POA) on file and current for scour-critical structures? *
  • Do observed conditions warrant a POA update or interim countermeasure?

Findings & Documentation

  • Are any critical findings requiring immediate notification present? *
  • Underwater photograph/video of representative conditions captured?
  • Dive team leader signature *

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