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Each member defines an area of notification by submitting digital mapping files for polygonal coverage.

The member notification area database is the service area coverage of where the facility owner/operator member will be notified of proposed excavation based on the underground facilities being registered.

It is the facility owner/operator members responsibility to maintain the notification area coverage database up to date. All changes to the notification area database must be submitted in writing, including mail or e-mail to notify Colorado 811 Member Relations of the requested change. All change requests will be processed in the order they were submitted, by date.

To better serve member needs, the following timeline is recommended:

• Digital data, including GIS shapefiles and Google Earth files, should be submitted at least ten (10) business days prior to the date that member facilities require notification of proposed excavation for the geographic location. From the date Colorado 811 receives the database update request, a total of five (5) business days is needed to complete the entry into the existing database. The member will be informed via e-mail when the update is complete. It is the members’ responsibility to review and approve the notification area database. Contact Member Relations personnel for more information.

• Requests for copies of the existing notification area database coverage will require an e-mail sent to the Member Relations Department, member-services@co811.org Requests for notification area database updates, due to an emergency, will be accommodated in a timely manner with the resources and personnel available at the time of the request.

• A Database Validation Form must be signed and returned to confirm the accuracy and location of the digital data transferred from the GIS shapefile into the Colorado 811 system.

• All requests will be processed in the order they were received unless otherwise communicated by the member facility owner or operator.

In the Colorado One Call law it states that if you own or operate any underground facilities on or near a public right-of-way or easement you should be registered with Colorado 811.

What files are required for a valid shapefile submission?

Each notification area submission must be provided as a single ZIP file containing, at minimum:

• .SHP – Geometry file

• .SHX – Shape index file

• .DBF – Attribute file

• .PRJ – Coordinate system file

Submissions missing any required component file will be rejected.

Which shapefile geometry types are supported?

Colorado 811 supports the following ESRI shapefile geometry types:

• POINT

• LINE

• POLYGON

For POINT and LINE shapefiles, you must specify a buffer distance to apply to the file to create a polygon shapefile.

A buffer is required when submitting POINT or LINE shapefiles. Colorado 811 applies the buffer to convert these geometries into polygon notification areas. POLYGON shapefiles are assumed to already include the appropriate buffer and do not require additional buffering. Minimum buffer that can be applied to linear and radian polygons is 30ft and the maximum is 1000ft.

All shapefiles submitted for import must use the following coordinate system:

• WGS84 Latitude/Longitude (Decimal Degrees)

Each submission must include the following details:

• Sender name and contact information

• Member code the notification areas apply to

• Effective date (immediate or future)

• Expiration date (never or a specific future date)

• Counties covered by the shapefile

• Buffer distance in feet (for POINT or LINE files)

No. All updates must be full database replacements. Partial updates or incremental additions are no longer accepted. Email shapefiles to the Member Relations Department at member-services@co811.org

All shapefiles must be emailed as a ZIP file to the Member Relations Department at: member-services@co811.org