History of Maintenance Hole
| Element | Description | Element Code | Essential | Uniclass 2015 | Updates |
|---|---|---|---|---|---|
| Maintenance Hole | A point of access into culverts for inspections. Also known as a manhole. | MHL | No | Pr_65_52_01_50 | 05-09-2022 |
| Maintenance Hole | A point of access into culverts for inspections. Also known as a manhole. | MHL | No | Pr_65_52_01_50 | 11-04-2023 |