{"id":"watermain-ductile-iron","version":"0.4.0","classification":{"uniformat":"G3010"},"names":["Watermain, ductile iron"],"aliases":["DI watermain","ductile iron pipe"],"service_life":{"median_years":60,"range_years":[50,75],"range_basis":"source_spread"},"pm_tasks":[{"task":"Flush distribution mains to remove deposits","frequency":"P1Y","reference":"UFM 3-230-02 Operation and Maintenance (O&M): Water Supply Systems","url":"https://www.wbdg.org/FFC/DOD/UFC/ufm_3_230_02_2026.pdf","page":117,"checklist":"6-3.3 Flushing (text)"},{"task":"Flow test all parts of the distribution system","frequency":"P5Y","reference":"UFM 3-230-02 Operation and Maintenance (O&M): Water Supply Systems","url":"https://www.wbdg.org/FFC/DOD/UFC/ufm_3_230_02_2026.pdf","page":132,"checklist":"7-2.1.2 Hydrant-Flow Tests (text)"}],"basis":[{"type":"public_document","life_type":"planning","title":"Barrie: City of Barrie Corporate Asset Management Plan: Proposed Levels of Service","url":"https://www.barrie.ca/Corporate-Asset-Management-Plan.pdf","page":148,"label":"Watermain - Ductile Iron","years":60,"note":"Asset management plan (planning life). Approved on text check: the label and value were found on the cited page."},{"type":"public_document","life_type":"planning","title":"Barrie: City of Barrie Corporate Asset Management Plan: Proposed Levels of Service","url":"https://www.barrie.ca/Corporate-Asset-Management-Plan.pdf","page":148,"label":"Watermain - Ductile Iron with Cathodic Protection","years":75,"note":"Asset management plan (planning life). Approved on text check: the label and value were found on the cited page."},{"type":"public_document","life_type":"accounting","title":"Kenora: AF-6-1 Tangible Capital Asset Policy (By-law 34-2026)","url":"https://listview.kenora.ca/Files/City%20Policy%20Manual/Administration%20and%20Finance/AF-6-1%20Tangible%20Capital%20Asset.pdf","page":17,"label":"Water Mains - Ductile Iron","years":60,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."},{"type":"public_document","life_type":"accounting","title":"Kingston: Tangible Capital Assets Policy","url":"https://cityofkingston.ca/media/pljd1bhs/finance_policy_tangible-capital-asset-policy.pdf","page":15,"label":"Water Utility - Water Pipes: DI","years":50,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."}],"confidence":{"grade":"B","sample_size":null},"open_questions":["These are Ontario accounting lives from municipal capital asset policies, not planning or observed replacement data."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-21","canonical_url":"https://unfinished.one/c/watermain-ductile-iron","versioned_url":"https://unfinished.one/c/watermain-ductile-iron/v/0.4.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Watermain, ductile iron, v0.4.0. https://unfinished.one/c/watermain-ductile-iron/v/0.4.0"}