Purpose and Types of Manhole Inspections
Pro-Pipe provides complete sewer hatch services. This includes inspecting manholes, which are more complex than pipe systems. We do this to evaluate and document various defects. We follow National Association of Sewer Service Companies (NASSCO) guidelines. NASSCO has developed rules to meet the needs of utility owners as part of the organization’s Manhole Assessment and Certification Program (MACP).
These rules cover two levels of inspection:
- Level 1 inspection produces basic assessment information regarding the general condition of a manhole.
- Level 2 inspection collects detailed data that documents all defects, determines the condition of the manhole, and provides sufficient information to recommend remedial actions.
When documenting defects, MACP follows the coding system established in the Pipeline Assessment and Certification Program (PACP). The latest version of MACP utilizes a system of pipe grading that identifies manholes by severity of defect, providing information to facilitate system rehabilitation planning and programming.