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Description
811 Chicago records all reported damages to underground facilities as 'hit tickets' since January 1, 2020. This dataset, provided by the Chicago Department of Transportation, documents incidents where excavation work may have struck utilities like gas, water, or communication lines. Each record includes details on the location, utility owner, reporting party, and a related dig ticket, though the data represents initial reports subject to official investigation.
Use Cases
Mapping damage hotspots using Location, Census Tracts, and Community Areas.
Analyzing trends by utility type and owner using Utility Name and Facility Owner.
Linking reported damages to excavation permits via Related Dig Ticket #.
Assessing reporting patterns by entity using Reported By Name and Hit By Name.
Temporal analysis of incidents using Hit Date and Hit Report Status.
Strengths
Data covers a specific time range starting January 1, 2020.
Includes detailed geospatial columns for location analysis (Census Tracts, Community Areas, Wards, Zip Codes).
Contains investigative context and legal citations from the source description.
Limitations
Key metadata like row count, size, and license is unavailable across all sources.
Data represents initial reports; inaccuracies may exist and are not always updated post-investigation.
Sources show a conflict in last updated dates (2026-05-29 vs 2026-04-12).
Provenance
Source
Chicago Department of Transportation (CDOT), Division of Infrastructure Management (DIM) / 811 Chicago.
Collection Method
Reports submitted to the 'One Call' service (811 Chicago) as mandated by Municipal Code of Chicago § 10-21-080.
Time Range
From January 1, 2020 onward.
Freshness
Last updated date conflicts: one source states 2026-05-29, another 2026-04-12.
Geography
City of Chicago, Illinois, USA.
A 'hit ticket' does not confirm damage occurred or assign liability; the 'hit by' field does not indicate the party caused the damage. Investigation data is not included. Data prior to 2020 is considered less reliable.