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Old revisions are immutable; corrections create a new revision and preserve the previous permalink.", "entity": { "type": "project", "id": "singapore-tengah-forest-town", "title": "Tengah Forest Town", "canonicalUrl": "https://1001smartcities.org/projects/singapore-tengah-forest-town/" }, "currentRevisionId": "2026-11-04-evidence-baseline", "revisions": [ { "id": "2026-11-04-evidence-baseline", "createdAt": "2026-11-04T05:56:38Z", "effectiveAt": "2026-11-03", "changeType": "baseline", "summary": "Created the first structured Evidence Passport with 20 claims and 10 source dossiers.", "preparedBy": { "type": "automation", "label": "AI-assisted evidence preparation", "humanApproved": false }, "review": { "status": "unreviewed", "by": null, "date": null, "note": "Awaiting operator and domain-expert review; publication of this revision implies neither." }, "changes": [ { "operation": "add", "path": "/evidencePassport", "summary": "Added claim-level evidence mapping and source dossiers." }, { "operation": "add", "path": "/revisionHistory", "summary": "Established a permanent, hash-addressed baseline revision." } ], "snapshotHash": "sha256:30c7e3bfe6424f3f3e404606f4e156186d6665f7865071e1348a886ef0f0ed7d", "snapshot": { "asOf": "2026-11-03", "projectFingerprint": "sha256:266afb15c7b9742d7c7f46b56bcc6a28fbdb43eada5ec45f2342053bd8a2594c", "assurance": { "status": "unreviewed", "scope": "evidence-passport-revision", "statement": "AI-assisted structural preparation. 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service for Tengah homes, with chilled water from rooftop chiller plants replacing individual condensers.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-7639ebac53fc41ed", "field": "snippet", "text": "the first large-scale residential deployment in Singapore's public housing", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-1ac88314e5c48adb", "src-21fab9a2da1e473c" ], "supportNote": "EdgeProp describes Tengah's cooling system as the first to be offered in a public housing estate; CNN reports Tengah is the first new town with centralised cooling.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-772d465fcf6e8a9d", "field": "snippet", "text": "an automated pneumatic waste-conveyance system", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-21fab9a2da1e473c", "src-2b4c97923b0a1476" ], "supportNote": "CNN quotes HDB on refuse being sucked through a pneumatic system to a chamber serving several blocks; HDB later listed Tengah among the roughly 40 precincts where the system is installed.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-67eada924cc614c1", "field": "snippet", "text": "EV charging and a smart-energy app", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-afb0ac93ffec144f" ], "supportNote": "SP Group's resident site lists EV charging points and the SP App with MyTengah features for bills and smart appliance monitoring.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-e24623ad90f38222", "field": "snippet", "text": "the first installations leaked in 2023", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-706136608be4da98", "src-1ac88314e5c48adb" ], "supportNote": "The Straits Times reports residents cancelling contracts after leaks; EdgeProp dates the first photos of pooling water in residents' chat group to September 2023, after the first flats were completed.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-55c168cb8f04707e", "field": "snippet", "text": "SP Group says the workmanship problems have since been fixed", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-49de1793a7e37bab" ], "supportNote": "In a sponsored article, SP Group staff say pandemic delays caused workmanship issues and that the situation has since improved considerably, citing SP's own engagement survey.", "caveat": "This account comes from content paid for by SP Group, not from independent reporting.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-7682848fc452c6c6", "field": "snippet", "text": "HDB has contracted later projects to a second cooling provider, Keppel", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-54e9c2b5fab03cd8" ], "supportNote": "Keppel's announcement states HDB awarded it a 20-year contract for nine upcoming Tengah projects, its second Tengah contract after one in September 2024, covering about 14,000 households across 12 projects.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-33476134905f7f52", "field": "snippet", "text": "By December 2025 more than 14,000 of the roughly 30,000 flats planned had been completed", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-8c9d820782c4bfdd" ], "supportNote": "EdgeProp reports HDB's December 2025 update: more than 14,000 flats in 14 projects completed, nearly half of the 30,000 planned.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-335b0a22b87d7f6c", "field": "snippet", "text": "The signature car-lite town centre, with vehicle roads running underneath", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-2ac637d1170f1e56", "src-21fab9a2da1e473c" ], "supportNote": "The 2016 masterplan report describes a car-lite town centre with vehicles plying underneath; CNN quotes HDB on roads, parking and utilities pushed beneath the town centre.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-f3147626ad625461", "field": "snippet", "text": "in December 2025 HDB listed the town centre among the amenities due in the coming years", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-8c9d820782c4bfdd" ], "supportNote": "EdgeProp quotes HDB's December 2025 update naming Tengah Town Centre among amenities residents can look forward to in the coming years.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-0aca9e33e66617dd", "field": "impact", "text": "after leaks in 2023, SP Group's cooling subscriptions fell from 10,600, or eight in ten flat owners, to more than 9,000, seven in ten, by February 2024", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-706136608be4da98" ], "supportNote": "The Straits Times compares SP's archived November 2023 figure of 10,600 subscribers, eight in ten flat owners, with SP's own count of more than 9,000, seven in ten, as at 12 February 2024, after residents cancelled following leaks.", "caveat": "Both figures are SP Group's 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"verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-706136608be4da98" ], "supportNote": "The Straits Times reports SP's offer of an additional six months' warranty and a lower usage rate for subscribers.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-fdb800bdb7f60319", "field": "lesson", "text": "Tengah's district cooling was sold before key collection", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-1ac88314e5c48adb", "src-54e9c2b5fab03cd8" ], "supportNote": "EdgeProp quotes a resident who signed up in 2020, years before the first keys; Keppel notes that early subscribers get air-conditioning ready on key collection.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies 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less energy than conventional air-conditioning.", "caveat": "An 'up to' figure from the system's providers, not a measurement in occupied homes.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-5f5a5d5fa23f8127", "field": "lesson", "text": "a design figure that no published measurement in occupied flats has yet confirmed", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-1ac88314e5c48adb" ], "supportNote": "EdgeProp reports that SP's site still quoted cost-saving estimates from November 2023 in July 2024; none of the sources reports measured savings in occupied flats.", "caveat": "This states an absence: no source reviewed for this entry reports measured savings; one could exist.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the 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"src-49de1793a7e37bab", "title": "Mothership.sg — 'People who fixed Tengah's cooling system…' (sponsored by SP Group, 15 Dec 2025)", "url": "https://mothership.sg/2025/12/tengah-cooling-system/", "publisher": { "name": null, "domain": "mothership.sg", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-55c168cb8f04707e" ], "temporal": { "publishedAt": "2025-12-15", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-11-03", "dossierCreatedAt": "2026-11-04", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "Independent: residential CCS operating, early complaints resolved by 2024-25", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-21fab9a2da1e473c", "title": "CNN Style — 'Singapore is building a 42,000-home eco smart 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"status": "not-captured" } }, { "id": "src-f6a22461bef55364", "title": "HDB — Building up Tengah Town: progress milestones (annex, 6 Dec 2025)", "url": "https://www.hdb.gov.sg/-/media/hdb-pulse/news/2025/supermarket-food-court-and-wellness-trail-to-open-at-tengahs-newest-neighbourhood-centre-in-1q-2026/20251206-Annex.pdf", "publisher": { "name": null, "domain": "hdb.gov.sg", "classification": "not-classified" }, "sourceType": "pdf", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-15ad09b6f2058c87" ], "temporal": { "publishedAt": "2025-12-06", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-11-03", "dossierCreatedAt": "2026-11-04", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "HDB's timeline of Tengah milestones, from the first key collections in August 2023 to the Park District hand-overs in 2025.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-8c9d820782c4bfdd", "title": "EdgeProp Singapore — 'Second neighbourhood centre in Tengah to open in 1Q2026' (8 Dec 2025)", "url": "https://www.edgeprop.sg/property-news/second-neighbourhood-centre-tengah-open-1q2026", "publisher": { "name": null, "domain": "edgeprop.sg", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-33476134905f7f52", "clm-f3147626ad625461" ], "temporal": { "publishedAt": "2025-12-08", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-11-03", "dossierCreatedAt": "2026-11-04", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "Reports HDB's December 2025 update: more than 14,000 flats in 14 projects completed, nearly half of the 30,000 planned; Tengah Town Centre among amenities still to come.", 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"descriptive-source-note", "value": "After leak complaints and cancellations, SP Group offered an extra six months' warranty and a lower usage rate; subscribers had fallen from 10,600 (eight in ten flat owners, November 2023) to more than 9,000 (seven in ten, February 2024).", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-1ac88314e5c48adb", "title": "EdgeProp Singapore — 'CCS woes spur Tengah residents to seek legal recourse against SP Group' (25 Jul 2024)", "url": "https://sg.finance.yahoo.com/news/ccs-woes-spur-tengah-residents-003000811.html", "publisher": { "name": null, "domain": "sg.finance.yahoo.com", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-7639ebac53fc41ed", "clm-e24623ad90f38222", "clm-12ea03d4d061919c", "clm-fdb800bdb7f60319", "clm-5f5a5d5fa23f8127" ], "temporal": { "publishedAt": "2024-07-25", 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