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Sanitary Manhole Inspection (NASSCO MACP)

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Level 1/2 manhole condition assessment coding structural and O&M defects from frame through invert per the NASSCO Manhole Assessment Certification Program.

NASSCO MACPASTM C478EPA CMOM

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Setup & Identification

  • Is the inspector MACP-certified and current? *
  • Are asset ID, location, and header data recorded? *
  • Assessment level performed *
  • Was confined-space entry procedure followed for interior (Level 2) inspection?
  • Date of inspection *

Frame, Cover & Chimney

  • Is the cover/lid secure, seated, and free of missing pieces or unsafe defects? *
  • Is the frame free of offset, cracking, or loss of seal to the structure? *
  • Is the chimney/adjustment ring free of cracks, misalignment, or infiltration? *
  • Is the cover free of inflow (holes/pick holes/dished) contributing I/I?

Cone, Wall & Joints

  • Are cone and wall free of cracks, spalling, or exposed/corroded reinforcement? *
  • Is there evidence of active infiltration at joints, lifting holes, or defects? *
  • Are steps/ladder rungs, if present, secure and safe?
  • Is corrosion (H2S/microbial) attack evident on concrete surfaces?

Bench & Invert

  • Is the bench free of deterioration and shaped to drain to the channel? *
  • Is the invert/channel smooth, aligned, and free of blockage or deposits? *
  • Are all connecting pipes seated and free of protruding taps or displacement?

Grading & Findings

  • Overall structural grade (1-5)
  • Overall O&M grade (1-5)
  • Photograph frame, interior, and invert
  • Inspector signature *

Sanitary Manhole Inspection (NASSCO MACP) 체크리스트 전체 다운로드

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