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City dataTransportation
Dig Ticket Notifications
Published by City of Chicago · Updated 10/26/2026 · Daily
- Last updated
- 10/26/2026
- First published 10/29/2019
- Update frequency
- Daily
- Formats
- 4
- CSV, JSON, GeoJSON
- Coverage
- Chicago
- City in Illinois
About this dataset
In order to help contractors and private residents avoid existing utility lines (including gas, electrical, and water lines) when digging, the Chicago Department of Transportation maintains 811 Chicago, a free, 24-hour service to private contractors and homeowners in Chicago. Anyone planning to dig within Chicago must obtain a “dig ticket” from 811 Chicago. 811 Chicago notifies all utilities of the impending excavations. The utility owners then send out staff to mark the location of the underground facilities within 48 hours (excluding emergencies), not counting Saturdays, Sundays, and holidays.
This dataset shows these utility notifications. Since it is common for the same dig ticket to produce multiple notifications, the same dig ticket will appear multiple times and this dataset cannot be used without further refinement to count, map, or analyze unique excavations in Chicago.
See https://ipi.cityofchicago.org/Digger for more information on the dig ticket system.
Files and access
Links open the official government source
- CSV downloaddata.cityofchicago.orgCSV
- JSON (SODA API)data.cityofchicago.orgJSON
- GeoJSONdata.cityofchicago.orgGeoJSON
- XMLdata.cityofchicago.orgXML
API endpoint: https://data.cityofchicago.org/resource/cygx-ui4j.json
Links open outside websites we do not control.
Details
- Publisher
- City of Chicago
- Listed on
- Chicago Data Portal
- Platform
- Socrata open data portal
- Also on Data.gov
- View listing
- State
- Illinois
- License
- Portal terms of use
- Views
- 8,115
- Keywords
- dig ticket, transportation, excavation, utilities
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Frequently asked questions
- Who publishes Dig Ticket Notifications?
- City of Chicago publishes this dataset on Chicago Data Portal.
- How often is it updated?
- The publisher lists the update frequency as daily. The last update was on 10/26/2026.
- How do I download it?
- It is available as CSV, JSON, GeoJSON, XML. Use the links in Files and access, which open the official government source.
Source: Chicago Data Portal and Data.gov · Last updated 10/26/2026 · Listing only; the data stays with the publisher