Sewer Manhole Inverts: What’s Collected and Why It Matters

Sewer manhole invert documentation involves physically measuring the depth from the rim of a manhole to the bottom (flowline) of each incoming and outgoing pipe. These measurements provide critical insight into pipe alignment, flow direction, and system configuration.

What Utilo Documents

Our invert documentation process is designed to supplement survey and engineering teams by providing accurate physical measurements without duplicating survey work.

• Rim-to-invert depth for each pipe
• Pipe direction (clock position)
• Flow orientation
• Pipe diameter
• Pipe material (when visible)
• Photo documentation

What We Do Not Provide

We do not establish rim elevations or perform survey-grade elevation control. Our measurements are intended to support survey crews and engineering workflows by providing reliable field depth data.

Why It Matters

Accurate invert documentation helps:

• Update GIS asset records
• Verify pipe connectivity
• Support rehabilitation planning
• Confirm flow direction and slope assumptions
• Reduce field time for survey crews

By handling the physical dip measurements in advance, we allow survey professionals to focus on elevation control and coordinate accuracy, improving efficiency without overlapping scope.

Additional Applications

This same field measurement approach can also be used for documenting valve box depths, including measurements to the top of the operating nut inside water valves when required for system verification.