Wastewater Underground Utility Information

The UNCC (Utility Notification Center of Colorado) is the designated organization that manages all types of ground excavation in the State of Colorado.  The main goal of this organization is to prevent human injuries and damages to underground utilities due to digging. 811 is the new federally mandated number that you should call, if you wish to start a digging project. The Denver Wastewater Management Division (WMD) is a Tier II member of the UNCC. This means that we manage and provide sanitary and storm sewer line and utility locating services for the City and County of Denver. As such, we handle around 12,000 Blue Stake requests (official name for locates requests) per year.

Denver WMD Underground Utility Section

Our Underground Utility Investigation office is managed and supervised by the Wastewater Construction section. You can place a locate request by calling 303-446-3744. You can also email us at locators@denvergov.org for regular locates/blue stake requests.  

We do not take regular orders after hours, on the weekends, or on holidays.

Regular Working hours:

Monday through Friday

6:30AM to 3:00PM

Emergency Locates:

Do NOT Send Emails for Emergency Cases!

For after-hours, weekend, and holiday emergency wastewater sewer line locates, please call us directly at 303-446-3400.

For all other utility markings, please call 811.