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토목 인프라 점검 18개 항목

Bridge Scour & Scour Countermeasure Inspection

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Inspection of bridge scour condition and installed countermeasures (riprap, articulated blocks, guide banks) with channel and foundation assessment per HEC-18/23.

FHWA HEC-18FHWA HEC-23NBIS 23 CFR 650 Subpart C

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Site & Waterway

  • NBI structure number *
  • Date of inspection *
  • Is the bridge on the Scour Plan of Action (POA) / scour-critical list? *
  • Approximate flow condition at inspection (dry, low, moderate, high)

Channel & Streambed

  • Is the channel free of significant aggradation, degradation, or lateral migration? *
  • Is the streambed at piers and abutments free of new scour holes? *
  • Measured/probed scour depth at critical pier (feet below reference)
  • Is debris accumulation at piers minimal (not constricting flow)?

Foundation Exposure

  • Are pier and abutment footings/piles free of undermining or exposure? *
  • Are spread footings still fully embedded to design elevation?
  • Is there any evidence of substructure settlement, tilting, or rotation? *

Countermeasures

  • Is placed riprap adequately sized, graded, and in position (not displaced or launched away)? *
  • Are articulated concrete blocks/mats, gabions, or grout bags intact?
  • Are guide banks, spur dikes, or bank revetments stable and functional?
  • Is the filter/geotextile layer intact where observable?

Rating & Actions

  • Channel/scour condition rating (0-9, NBI Item 61/113 basis)
  • Is a POA action (dive inspection, monitoring, closure) triggered? *
  • Findings and recommended actions

Bridge Scour & Scour Countermeasure Inspection 체크리스트 전체 다운로드

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