Uniformat G3030

Stormwater pond

A stormwater pond has a useful life of about 50 years, the median of 14 published sources, which state 25–100 years.

Also listed as Stormwater management pond, SWM pond, stormwater facility, detention pond

• 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 · CNA e-Tool Estimated Useful Life Table, p1 · HUD CNA 3.2.2.5 “Stormwater mgmt ponds” — U.S. Department of Housing and Urban Development (planning life)
  Same life for family and elderly properties. US multifamily housing. HUD's row is for site work at US multifamily properties, not municipal networks.
• 25 years · Greater Sudbury: Enterprise Asset Management Plan (2023), p30 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 25 years · Halton: Halton Region 2025 Asset Management Plan, p110 (planning life)
  Asset management plan (planning life). Compared with an image of the cited page.
• 75 years · Kingston: Tangible Capital Assets Policy, p14 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 40 years · Meaford: By-law 2020-83, Tangible Capital Asset Policy, Appendix A Estimated Useful Lives, p19 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 60 years · Quinte West: A09-POLICY-0034 Tangible Capital Asset Policy, p38 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 50 years · Simcoe: County of Simcoe 2025 Asset Management Plan, p92 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 50 years · Simcoe: POL-FIN-004 Tangible Capital Assets Policy (Schedule 3 to AUC 2026-046), p21 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 40 years · The Blue Mountains: POL.COR.19.04 Tangible Capital Assets Policy, p12 (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 100 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.
• 95.9 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.
• 30 years · Peterborough: 2025 City of Peterborough Asset Management Plan, p155 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 80 years · Sault Ste. Marie: Stormwater Asset Management Plan, City of Sault Ste. Marie, p14 (planning life)
  Asset management plan (planning life). Approved on text check: the label and value were found on the cited page.
• 49.9 years · Haldimand County: 2025 Asset Management Plan, p91 (planning life)
  Asset management plan (planning life). Compared with an image of the cited page.

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

12 tasks in 6 work orders. Intervals that fall due together are one visit: the every 20 years visit also covers the monthly, quarterly, semi-annual, annual and every 5 years tasks.

1. 1Monthly
2. 2Monthly
3. 3Qtr
4. 4Monthly
5. 5Monthly
6. 6Semi
7. 7Monthly
8. 8Monthly
9. 9Qtr
10. 10Monthly
11. 11Monthly
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

• HUD gives planning lives for US multifamily housing; the municipal rows are Ontario accounting lives. Neither is observed replacement data.
• The guidebook says its maintenance suggestions are guidance, not federal requirements.
• Written for GSA contracted O&M in US federal buildings; job plans are generic and defer to manufacturer instructions, and the fire extinguisher plans only point to NFPA 10.

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

Cite this

Citation

unfinished.one (2026). Stormwater management pond, v0.7.0. https://unfinished.one/c/stormwater-pond/v/0.7.0

BibTeX

@misc{unfinished_stormwater_pond_0_7_0,
  title = {Stormwater management pond},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.7.0},
  url = {https://unfinished.one/c/stormwater-pond/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