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Riparian rights and why Colorado does not have them
No. Colorado has never recognized riparian rights. The Colorado Supreme Court rejected the doctrine outright in Coffin v. Left Hand Ditch Co. in 1882, and the state allocates water solely by priority of appropriation. Coffin v. Left Hand Ditch Co., 6 Colo. 443 (1882)
Owning land along a Colorado stream gives you the right to look at the water. Taking any of it requires a decreed right, and the date on that right is what decides whether you actually get any.
What riparian rights are
Riparian doctrine comes from English common law and governs most of the eastern United States. Its logic is simple: the right to use water attaches to the land that touches it. Every owner along a watercourse — every riparian owner — may make reasonable use of the flow, no one may unreasonably harm the others, and in a shortage everyone shares the pain proportionally. The right does not depend on when you started using water, and it generally cannot be sold away from the land.
It is a sensible rule where it rains. It falls apart where it does not.
Why it never took hold here
Colorado's economy began with mines and farms that were nowhere near a stream. The water reached them through ditches, sometimes for miles, sometimes across drainage divides into an entirely different basin. Under riparian rules that investment would be worthless: the person who dug the ditch has no riparian land, and anyone who later bought a parcel on the bank could shut them off.
The territorial legislature and then the 1876 constitution chose the opposite rule. The constitution declares the water public and then guarantees the right to divert it — pointedly, without any reference to owning the bank:
The right to divert the unappropriated waters of any natural stream to beneficial uses shall never be denied. Priority of appropriation shall give the better right as between those using the water for the same purpose.
Coffin v. Left Hand Ditch Co.
The question reached the Colorado Supreme Court in a dispute over the St. Vrain: an upstream ditch company diverted water out of the drainage, and downstream landowners argued that as riparians they were entitled to the natural flow past their land. Deciding the case on December 15, 1882, the court held that the riparian doctrine had never been in force in Colorado and that the first appropriator of water for a beneficial purpose holds the prior right, subject to the qualifications in the constitution. Coffin v. Left Hand Ditch Co., 6 Colo. 443 (1882)
The court's reasoning rested on the physical facts of the place: in a climate this dry, irrigation is not an amenity but a precondition for agriculture, and a rule imported from a wet country would have made most of Colorado unproductive. The decision was influential enough that prior appropriation in its pure form is still called the Colorado Doctrine.
The two systems side by side
| Riparian (most eastern states) | Prior appropriation (Colorado) | |
|---|---|---|
| Source of the right | Owning land touching the water | Putting water to beneficial use, confirmed by decree |
| Who gets water in a shortage | Everyone, reduced proportionally | Seniors in full; juniors get nothing |
| Can it be sold separately from land? | Generally no | Yes — and often is |
| Can water leave the basin? | Traditionally no | Yes, with a decree |
| Lost by non-use? | Generally no | Yes — abandonment |
Hybrid states, and why Colorado is not one
Several western states — California and Texas among them — run hybrid systems that recognize some riparian claims alongside appropriative rights, usually because those claims predate statehood or a particular statute. Colorado has no such overlay. There is no category of Colorado water right that arises from land ownership, no grandfathered riparian class, and no reasonable-use sharing rule. Every right traces to an appropriation and a date.
This site covers Colorado only. If you are comparing states because you own land in more than one, treat the doctrines as genuinely different bodies of law rather than variations on a theme, and get advice in each state. For how the Colorado version works in practice, start with first in time, first in right, or the rest of the basics.
Common questions
Does Colorado have riparian rights?
No. Colorado rejected the riparian doctrine in Coffin v. Left Hand Ditch Co., 6 Colo. 443 (1882), and has always allocated water by prior appropriation. There is no category of Colorado water right that arises from owning land next to water.
Can I use the creek that runs through my Colorado property?
Not without a water right. The water in a natural stream is public property under Colorado Constitution article XVI, section 5, and diverting it requires a decreed appropriation — regardless of who owns the bank or the streambed.
What is the difference between riparian rights and prior appropriation?
Riparian rights attach to land touching the water, are shared proportionally in a shortage, and generally cannot be sold separately from the land. Prior appropriation assigns rights by the date water was first put to beneficial use, fills senior rights completely before juniors get anything, and treats the right as separate, sellable property.
Why is prior appropriation called the Colorado Doctrine?
Because Colorado adopted it earliest and in its purest form — constitutionally in 1876 and judicially in 1882 — with no residual riparian rights of the kind that survive in hybrid states such as California.
Primary sources
- Colorado Constitution, article XVI, sections 5 and 6 (official text) effective Aug. 1, 1876
- Coffin v. Left Hand Ditch Co., 6 Colo. 443 (1882) decided Dec. 15, 1882
- C.R.S. § 37-92-102 — basic tenets of Colorado water law (Title 37, official text) C.R.S. 2025 edition