DitchBook

Colorado ditch company directory

This directory covers 1,387 Colorado mutual ditch and reservoir companies — the largest free public directory of them we know of, and growing as more are verified. It's compiled from Colorado Secretary of State business-entity records and DARCA membership data; each company has its own public-record profile page with its Secretary of State entity ID, basin, and town, where known. Missing a company? Tell us and it gets added. Browse by river basin or county below, or type a name or town to find it directly.

1,387 companies in the census; 643 with DWR-verified water rights (standings as of August 3, 2026; matches published as of August 17, 2026).

See the map of Colorado's ditches — 643 companies plotted at their real headgates and reservoirs, straight from state water records.

Colorado ditch companies, by the numbers — standings, ages, earliest decreed rights, and basin counts, computed from the same records behind these pages.

Type at least 2 letters.

Browse by basin

Browse by county

Counties with a DWR-verified water structure and/or a registered address on file. 745 of 1,387 companies aren't on a county page via a structure, and 482 aren't via a registered address — see why.

Standing, at a glance

Standing is from the Colorado Secretary of State as of August 3, 2026: In good standing and “Exists” are both current statuses; Delinquent most commonly follows a missed Periodic Report (other causes exist — see the delinquency guide), usually fixable in one sitting; — means the company has no row in the current Secretary of State pull. Full explanation: what this check tells you.

Sources & prior work

Company records come from the Colorado Secretary of State's business-entity data (standings refreshed monthly), water rights and structure locations from Colorado DWR's CDSS records, and DARCA membership from the Ditch and Reservoir Company Alliance. The company list itself builds on the Open Water Foundation's Colorado ditch and reservoir companies dataset — open data that made this directory possible, gratefully credited.