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      "title": "Chicago OIG — Advisory Concerning the City's Complaint-Based Approach to City Services (PDF, 6 March 2024)",
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       "value": "The reporting-inequality evidence, and it is the City's own admission rather than an outside estimate: quotes Streets and Sanitation recognising \"disparities in who used 311\" with heat maps and data showing certain areas, predominantly on the North Side in majority white neighbourhoods, using it more; explains the shift away from a complaint-based system for tree trimming; notes that residents in low-income and minority neighbourhoods may limit requests to what they consider urgent.",
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     },
     {
      "id": "src-378520fa88911ccf",
      "title": "Block Club Chicago / Illinois Answers Project — A New City Tree Trim Strategy Produces Big Results. Not Everyone Is On Board (23 October 2024)",
      "url": "https://blockclubchicago.org/2024/10/23/a-new-city-tree-trim-strategy-produces-big-results-not-everyone-is-on-board/",
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       "value": "Carries the tree-trim numbers and the objection: 311 tree-trim requests stopped in early 2023 except emergencies, crews sent onto the first of 800 half-mile-square grids in April 2023; about 40,000 trees trimmed per year before the switch against nearly 124,000 by September 2024; alderpeople complaining they lost control over the order of work.",
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      "title": "Chicago Sun-Times — Chicago's 311 system turns into a 'black hole' for residents' nonemergency complaints (26 February 2026)",
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       "type": "descriptive-source-note",
       "value": "Independent coverage of the audit, with Inspector General Deborah Witzburg's description of residents seeing a request coded completed while the pothole is still there, and OEMC's response that the service advocacy function has not existed in full for several years. Note the conflict this entry did not adopt: the Sun-Times dates the creation of 311 to 1998 under Mayor Daley at a cost of $4 million, where OIG dates implementation to 1999 — the entry follows OIG and omits the cost figure.",
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      },
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     "claimsMapped": 2,
     "sourcesTotal": 6,
     "sourcesUsedByClaims": 2,
     "sourcesWithPublicationDate": 4,
     "sourcesWithArchive": 2,
     "sourcesWithExactLocator": 0,
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    },
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     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
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      "supportNote": "Counted directly from the city's own open dataset via the Socrata API on 7 August 2026, over calendar-year 2025 rows.",
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       "type": "descriptive-source-note",
       "value": "Carries almost every load-bearing claim: \"Chicago implemented its 311 system in 1999 and began using its current 311 software, Salesforce, in late 2018\"; 311 receives between 2.2 and 2.3 million requests each year; 69 budgeted full-time positions in 2025 of which the Service Advocacy Unit is two, assisting more than 40 City departments; the sewer cave-in example where the initial work order has an SLA of 20 days while the work orders needed total 110 days; two kinds of SLA shown without explanation, the \"average\" being in fact a median and available only for the 44 most common request types; departments closing duplicates without classifying them; department notes not visible to the public; \"black hole\" used by multiple community members and ward staff; footnote 18 stating the Data Portal copy is cleaned before upload and therefore does not reflect all service request categories.",
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       "type": "descriptive-source-note",
       "value": "Queried through the Socrata API on 7 August 2026. Dataset description states it covers requests created after the launch of the new 311 system on 12/18/2018 plus some legacy records flagged in a LEGACY_RECORD column; rows last updated 2026-08-07. All counts in the impact field were computed from this dataset, as was the channel split via the origin column. The pre-2019 record is not in this file: it survives as separate frozen per-service-type historical datasets (potholes, graffiti, rodent baiting, tree trims, garbage carts and others), which is why series cannot be run across the migration.",
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     },
     {
      "id": "src-d0524634aeb7be01",
      "title": "Chicago OIG — Advisory Concerning the City's Complaint-Based Approach to City Services (PDF, 6 March 2024)",
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       "value": "The reporting-inequality evidence, and it is the City's own admission rather than an outside estimate: quotes Streets and Sanitation recognising \"disparities in who used 311\" with heat maps and data showing certain areas, predominantly on the North Side in majority white neighbourhoods, using it more; explains the shift away from a complaint-based system for tree trimming; notes that residents in low-income and minority neighbourhoods may limit requests to what they consider urgent.",
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