Uniformat G3030

Storm manhole

A storm manhole has a useful life of about 62.5 years, the median of 10 published sources, which state 50–80 years.

Also listed as storm maintenance hole

• Confidence C
• Version 0.7.0 (permanent link)
• Reviewed 2026-10-22

Service life

Years in service. The band runs from the shortest to the longest life the sources state, so it shows how much they disagree, not how long 80% of units last. The line is the median of the stated lives.

Work out when yours is due for replacement · Compare with what municipalities assume

Basis

• 50 years · Greater Napanee: By-law 2012-11, Tangible Capital Asset Policy, Appendix B Asset Useful Lives, p17 (accounting life)
  Capital asset policy (amortization period). Compared with an image of the cited page.
• 50 years · Kenora: AF-6-1 Tangible Capital Asset Policy (By-law 34-2026), p16 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 50 years · Severn: By-law 2019-04, Corporate Policy Manual: Tangible Capital Asset Policy, Useful Life Guide, p403 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 75 years · Amherstburg: Asset Management Plan Town of Amherstburg 2025, p62 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 75 years · Bruce: Asset Management Plan 2025, Bruce County, p67 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 80 years · Chatham-Kent: Detailed Asset Management Plan: Stormwater 2025, p11 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 50 years · Kirkland Lake: Asset Management Plan 2025 Town of Kirkland Lake, p95 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 75 years · Orillia: City of Orillia Asset Management Plan 2025, p146 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 50 years · Peterborough: Asset Management Plan 2025 - Peterborough County, p71 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 75 years · Stormont: Asset Management Plan 2025, p27 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

3 tasks in 1 work order.

1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12Annual

Months from the schedule start. Download the tasks as CSV for a CMMS, or ask the MCP tool get_pm_schedule for dated visits.

Frequencies are ISO 8601 durations in the data (P3M = every 3 months).

Open questions

• These are Ontario accounting lives from municipal capital asset policies, not planning or observed replacement data.

Know the answer? Send it with a source to [email protected].

Cite this

Citation

unfinished.one (2026). Storm manhole, v0.7.0. https://unfinished.one/c/storm-manhole/v/0.7.0

BibTeX

@misc{unfinished_storm_manhole_0_7_0,
  title = {Storm manhole},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.7.0},
  url = {https://unfinished.one/c/storm-manhole/v/0.7.0},
  note = {CC BY 4.0}
}

Licence CC BY 4.0 · How to cite · JSON · Versions: 0.7.0, 0.6.0, 0.5.0, 0.4.0, 0.3.0, 0.2.0, 0.1.0