Colorado Water Courts Explained: Divisions, Decrees, and Appeals

Colorado water courts are seven specialized district courts that decide who owns water rights in the state, organized by river basin rather than county. They exist because Colorado treats a water right as a form of property under the prior appropriation doctrine, where the first user to put water to beneficial use holds a senior claim over everyone who follows. Instead of sending disputes to an administrative agency, Colorado routes them through courts so the people involved get the same legal protections they would in a land case.¹

Whether you want to claim a new right, change one you already own, approve an augmentation plan, or defend a right someone else is challenging, you’ll do it in one of these courts. Here’s how the system is laid out and what to expect at each step.

Which Division Covers Your Water

Every case must be filed in the division where the point of diversion or well physically sits. The seven divisions follow watershed boundaries, so the court handling your case depends on which river basin your source feeds.¹

Division 1: South Platte River basin, including the Big Laramie, Republican, and Smoky Hill drainages.
Division 2: Arkansas River and Dry Cimarron drainages.
Division 3: Rio Grande basin and the San Luis Valley tributaries.
Division 4: Gunnison River basin, plus the San Miguel and the northern portion of the Dolores River system.
Division 5: Colorado River mainstem and tributaries, excluding the Gunnison.
Division 6: Yampa, White, Green, and North Platte River drainages.
Division 7: San Juan, La Plata, Mancos, and the southern portion of the Dolores River system in the state’s southwest corner.

Because the court for your basin already knows local supply conditions and the pattern of existing rights on your stream, filing in the right division is more than a venue formality. If you’re unsure which basin covers your diversion, the Colorado Division of Water Resources can help you identify it.

One important boundary: not all Colorado water goes through these courts. Eight designated groundwater basins on the Eastern Plains, including the Northern High Plains, Southern High Plains, Upper Black Squirrel Creek, and Lost Creek, are administered by the Colorado Ground Water Commission instead.² If your well or planned diversion falls inside one of those designated areas, your case runs through the Commission, not the water court.

Who Decides Your Case

Four roles do most of the work in any water court matter, and knowing which person handles which step will save you time.

The water judge is a sitting district court judge designated annually by the Colorado Supreme Court. The judge signs final decrees and presides over any contested trial.³ Most applicants never appear before the judge unless their case is protested.

The water referee is the first decision-maker in most cases. Appointed by the water judge, the referee investigates applications, evaluates whether a new claim would injure existing rights, and issues rulings on uncontested matters.³ If nobody objects, the referee’s ruling goes to the water judge for a signature and becomes your decree.

The water clerk accepts filings, keeps the official record of water rights in the division, and publishes the monthly resume of new applications.

The division engineer, a licensed professional engineer with the state Division of Water Resources, gives the court technical recommendations on water availability and potential injury to senior rights.⁴ The engineer’s analysis carries real weight. Applicants who disagree with it should expect to bring strong technical evidence of their own.

Filing an Application

Every case starts with a verified application filed with the water clerk in your division. The water judges have jointly adopted standard forms for new rights, changes, augmentation plans, and other common filings; current versions live on the Colorado Judicial Branch website.⁵

Your application needs a legal description of the diversion structure (typically quarter-quarter section, township, and range, often with GPS coordinates), the source (such as a named creek or aquifer), the date you first took steps to appropriate the water, the amount claimed, and the intended use. Stream diversions are stated in cubic feet per second; reservoir storage in acre-feet. Precision matters. A location error or a sloppy flow number can produce a decree you can’t enforce against your neighbors, or no decree at all.

Licensed attorneys file electronically through the Colorado Courts E-Filing system.⁶ Self-represented parties can’t use the electronic system and must bring or mail one paper copy to the water clerk.⁷ The filing fee for a new water right application is $235. Changes of water right and plans for augmentation carry a doubled fee of $469.⁸ You also pay the actual publication cost for the resume notice described below.

Beneficial Use and the Anti-Speculation Rule

Colorado defines beneficial use as the amount of water that is reasonable and appropriate under efficient practices to accomplish the purpose of the appropriation without waste.⁹ That definition is the basis, the measure, and the limit of every water right. You can’t get a decree for more water than you can actually put to productive use, and diverting more than you need is waste that the court or the state engineer can curtail.¹⁰

The companion rule is anti-speculation. You can’t obtain a water right just to hold and resell it. An applicant has to show a specific plan to put the water to beneficial use, or at minimum firm contractual commitments with someone who will. Municipalities get a narrow exception for conditional rights tied to future growth, but even they must support their projections with real planning periods and real population data. Speculative claims without evidence of actual demand get denied.

The Resume and the Opposition Deadline

Once the clerk accepts your filing, your application joins the monthly resume. By the fifteenth of each month, the clerk compiles a summary of every application filed the previous month and publishes it in newspapers of general circulation in every affected county.⁵ The resume is also posted on the water court’s website and emailed to anyone who has registered to receive it. Publication puts every other water user in the basin on notice.

Anyone who thinks a new application could injure their rights can file a statement of opposition. The deadline is the last day of the second month after the application is filed. An application filed in January, for example, draws opposition through the last day of March.¹¹ The opposition filing fee is $192.⁸ Miss the deadline and you’re generally shut out unless you can show mistake, inadvertence, surprise, or excusable neglect in a motion to intervene.¹²

Getting to a Decree

If no one opposes your application, the referee reviews it, coordinates with the division engineer on technical questions, and issues a ruling. When the referee finds the application meets the legal standards, the ruling goes to the water judge for signature. The signed decree functions like a deed to the water, with a specific priority date you can enforce against junior users.

When opposition is filed, the referee still investigates and issues a ruling, but the process gets longer and typically involves negotiations and stipulations between the parties. Any party who disagrees with the referee’s ruling has 21 days to file a written protest.¹² A protest triggers a fresh hearing before the water judge, who isn’t bound by what the referee found. The applicant carries the burden of proof, and in a change case or augmentation plan must also show no injurious effect on other rights holders. A protest costs $192 unless you’re already a party.⁸

Timelines vary. A straightforward, uncontested application can wrap up in several months. Cases with multiple opposers, complex engineering disputes, or augmentation plan issues can run well past a year.

Conditional Rights and the Six-Year Diligence Deadline

If you have a plan to appropriate water but haven’t finished building the ditch, well, or reservoir, Colorado lets you lock in a priority date through a conditional water right. The court must find that the water can and will be diverted and beneficially used, and that the project can and will be completed with diligence and within a reasonable time.¹³

After a conditional decree is entered, a six-year clock starts. You must return to water court and show reasonable progress toward completing the appropriation: engineering work, permitting activity, construction progress, financing efforts, and similar concrete steps. Miss that six-year window, measured from either the original decree or the most recent diligence decree, and the conditional right is conclusively presumed abandoned.⁷ This is one of the most common ways people lose water rights, and the presumption can’t be beaten once the date passes. Put it on the calendar.

Augmentation Plans in Over-Appropriated Basins

In many Colorado basins, especially along the Front Range and Eastern Plains, every drop of available water is already claimed. If you want to divert in one of those basins, you’ll almost certainly need a court-approved plan for augmentation. The concept is simple: you replace the water your diversion removes from the stream so senior rights aren’t injured.¹⁴

Replacement supplies can come from stored water, purchased senior rights, or treated return flows. The plan has to show the water court that your junior diversion will be fully offset, in the right amounts at the right times and places, so no senior user comes up short. Augmentation plans typically involve substantial engineering analysis and are among the more expensive and technically demanding water court proceedings.

Abandonment and the Decennial List

Owning a water right means using it. Colorado defines abandonment as the permanent discontinuation of use with the intent to give up the right. Ten or more years without applying your water to beneficial use when it was available creates a rebuttable presumption that you’ve abandoned it.¹⁵ You can fight it, but the burden is on you to prove you never intended to walk away.

Every ten years, division engineers compile a list of water rights they consider abandoned, drawing on diversion records, site visits, and investigation of each right.¹⁶ If your right lands on that list, you can file a protest with the water court for $45.⁸ Courts look at whether you maintained diversion structures, tried to sell or lease the water, filed protective documents, or faced real economic or legal obstacles. If you can’t overcome the presumption by a preponderance of the evidence, the court decrees the right abandoned and it’s gone for good. Once the list is concluded by judgment and decree, the result is final.¹⁵

Appeals Go Straight to the Supreme Court

Water court decisions skip the Colorado Court of Appeals. Appeals from final water court decrees go directly to the Colorado Supreme Court, which has exclusive appellate jurisdiction over water cases involving priorities or adjudications.¹⁷ For an applicant, losing before the water judge puts you one step from the end. The Supreme Court reviews legal conclusions independently but defers to the water judge’s factual findings, which makes a strong trial record critical.

Handling It Without a Lawyer

Individuals can file applications and statements of opposition and participate before both the referee and the judge without an attorney.⁷ Corporations and other organizational parties can represent themselves before the referee but must have an attorney for anything in front of the water judge.

The court holds self-represented parties to the same procedural and legal standards as attorneys, and water court procedure has enough technical quirks to catch people off guard. A simple, uncontested application in a basin with unappropriated water is feasible on your own if you’re careful with the forms and deadlines. Anything involving opposition, an augmentation plan, or a change of an existing right usually calls for both a water attorney and a water engineer. Colorado also allows “unbundled” legal services, where an attorney helps with discrete tasks like completing the application without taking over the whole case. And if you’re self-represented, remember you’ll be filing paper documents with the water clerk, because the electronic filing system is restricted to licensed attorneys.

1
Justia Law. Colorado Code 37-92-201 – Water Divisions
2
Division of Water Resources. Designated Basins
3
Justia Law. Colorado Code 37-92-203 – Water Judges – Jurisdiction
4
Justia Law. Colorado Code 37-92-202 – Division Engineers
5
Justia Law. Colorado Code 37-92-302 – Applications for Water Rights or Changes of Such Rights – Plans for Augmentation
6
Colorado Judicial Branch. E-Filing
7
Colorado Judicial Branch. Self-Represented Guide To Colorado Water Courts
8
Colorado Judicial Branch. List of Fees
9
Justia Law. Colorado Code 37-92-103 – Definitions
10
Colorado Water Knowledge. Important Concepts
11
Colorado Judicial Branch. Opposing a Water Court Application
12
Justia Law. Colorado Code 37-92-304 – Proceedings Before Water Judge
13
Justia Law. Colorado Code 37-92-305 – Standards With Respect to Rulings of the Referee and Decisions of the Water Judge
14
Division of Water Resources. Augmentation Plans
15
Justia Law. Colorado Code 37-92-402 – Special Procedures for the Determination of Abandonment
16
Department of Natural Resources. Division of Water Resources Releases Revised Decennial Abandonment List of Water Rights
17
Justia Law. Colorado Code 13-4-102 – Jurisdiction