{"id":"sanitary-manhole","version":"0.6.0","classification":{"uniformat":"G3020"},"names":["Sanitary manhole"],"aliases":["sewer manhole","maintenance hole"],"service_life":{"median_years":67.5,"range_years":[50,100],"range_basis":"source_spread"},"pm_tasks":[{"task":"Open manhole and inspect interior","frequency":"P3M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":141,"checklist":"Table 18-1 Drain and vent system"},{"task":"Remove debris and sediment and flush manhole","frequency":"P3M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":141,"checklist":"Table 18-1 Drain and vent system"}],"basis":[{"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":18,"years":50,"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":16,"years":75,"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":"Prince Edward: FIN-12 Tangible Capital Assets Policy","url":"https://www.thecounty.ca/wp-content/uploads/2023/09/FIN-12-Tangible-Capital-Asset-Policy.pdf","page":34,"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":"planning","title":"Chatham-Kent: Detailed Asset Management Plan: Wastewater 2025","url":"https://www.chatham-kent.ca/localgovernment/budget/Documents/DAMP%20Reports/2024/DAMP%20-%20Wastewater.pdf","page":12,"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":"planning","title":"Kirkland Lake: Asset Management Plan 2025 Town of Kirkland Lake","url":"https://kirklandlake.civicweb.net/document/32531/","page":83,"years":50,"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":"Haldimand County: 2025 Asset Management Plan","url":"https://media-001-ca.cdn.govstack.com/haldimandcounty-008-ca/media/cxnnlhik/fca-2025-asset-management-plan.pdf","page":107,"years":100,"note":"Asset management plan (planning life). Compared with an image of the cited page."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["These are Ontario accounting lives from municipal capital asset policies, not planning or observed replacement data.","Some maintenance intervals come from TM 5-692-1, an Army manual for mission-critical (C4ISR) facilities; they may be tighter than typical commercial practice."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/sanitary-manhole","versioned_url":"https://unfinished.one/c/sanitary-manhole/v/0.6.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Sanitary manhole, v0.6.0. https://unfinished.one/c/sanitary-manhole/v/0.6.0"}