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1739 Broadway
Boulder, CO 80306
303-441-3200
303-441-4210 Fax

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PO Box 791
Boulder, CO 80306

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Instream flow program

Boulder's Instream Flow Program


What is an Instream Flow?

Whereas most Colorado water rights involve uses that divert water from the stream, an instream flow water right allows water to remain in a creek for the purpose of protecting the natural environment. Under Colorado law, the only entity that can hold such a right is the Colorado Water Conservation Board (CWCB).

Greenback Cutthroat Trout

Greenback Cutthroat Trout

How is the City of Boulder involved?

Boulder has donated several water rights to the CWCB for instream flow purposes in Boulder Creek and its tributaries. Boulder's agreements with the CWCB allow Boulder to call for more water in North Boulder and Boulder Creeks if streamflows drop below specific levels.

Boulder's agreements with the CWCB allow the city to administer and monitor Boulder Creek and its tributaries. This means that Boulder keeps current flow records on a daily basis and contacts the state when flows drop below legal limits.

Who benefits from Instream Flows?

Ducks swimming in creek

The natural ecosystem and the wildlife species that live in and around the creeks benefit from the protection afforded by the instream flow rights.

Canoes in creek flow

Residents and vistors enjoy many forms of recreation on the creek including kayaking, fishing and tubing.

mountain water fall

People who value the aesthetic beauty of the creek benefit when streams are kept form going dry.

What is this thing?

Pressure Tranducer - recording water flow

Does this look familiar? This device sits by Boulder Creek near Broadway. It is a pressure transducer system that records the streamflow at this point in Boulder Creek. The large square item is a solar panel that is the source of energy for the transducer. The city is able to phone this machine and get the streamflow reading from remote locations. This instrument is very useful in the city's efforts to maintain instream flows in the creek.


Where can I learn more?

Contact the City of Boulder at:

City of Boulder
Public Works Department
1739 Broadway, PO Box791
Boulder, CO 80306
Phone: 303-441-3266

Contact the Colorado Water Conservation Board at:

Colorado Water Conservation Board
Stream and Lake Protection Section
1313 Sherman Street, Room 721
Denver, CO 80203
Phone: 303-866-3441
Or visit the CWCB Web page at: www.cwcb.state.co.us

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