Water Rights

Prior Appropriation System

Water rights in Colorado are unique when compared to other parts of the United States. The use of water is governed by what is known as the "Prior Appropriation System". This system of water allocation controls who uses how much water, the types of uses allowed, and when those waters can be used.

A simplified way to explain this system is often referred to as "first in time, first in right." An appropriation is made when an individual physically takes water from a stream (or underground aquifer) and places that water to some type of beneficial use. The first person to appropriate water and apply that water to use has the first right to use that water within a particular stream system. This person (after receiving a court decree verifying their priority status) then becomes the senior water right holder on the stream, and that water right must be satisfied before any other water rights can be fulfilled.

Important Links

Abandonment of Water Rights

Abandonment is the termination of an absolute water right in whole or in part as a result of the intent of the owner to discontinue permanently the use of all or part of the water available thereunder. Failure to apply a water right to beneficial use when water was available for a period of ten or more years results in a rebuttable presumption of abandonment. Once the rebuttable presumption is established through non-use, the burden shifts to the owner of the water right to prove that they did not intend to abandon the water right.

Every 10 years, the division engineer is required to present to the water court a list of water rights that the division engineer has found to be abandoned.  The process and timeline of the decennial abandonment process are guided by statutory requirements as follows: (for detailed timeline, see important links)


Division Engineer’s Abandonment Lists

The initial list of water rights determined to have been abandoned by the division engineer shall be prepared by July 1, 2020 with publication and notice mailed to the last known owner by July 31, 2020.

Division Engineer's 2020 Initial Abandonment List (pdfs by division and sortable spreadsheet for all of Colorado)



Final Revised Abandonment Lists:

The final revised abandonment list is filed with the water court and posted on DWR's website no later than December 31, 2021.

The Division Engineers develop final revised abandonment lists in consultation with the State Engineer to contain water rights that have been abandoned in whole or in part.  The revised abandonment lists, when concluded by judgment and decree of the water court, are conclusive as to the water rights determined to have been abandoned.   

Any person who wishes to protest the inclusion of any water right on a final revised abandonment list shall file a written protest with the Water Court in that division not later than June 30, 2022 along with the required forty-five dollar ($45.00) fee. The protest shall set forth in detail the factual and legal basis for protesting the abandonment. A form for such protest is available at: http://www.courts.state.co.us/Forms.  


Division Engineer's December 2021 Final Revised Abandonment Lists (pdfs by division and sortable spreadsheet for all of Colorado)


Important Links


Guideline, Policy, Protocol, Written Instruction & Order