The Colorado ditch map

Every dot is a verified structure location, not a ditch route. Zoom in past a company's pin to see its individual structures and — where DitchBook has hand-reviewed the alignment — the ditch itself. Most points come directly from Colorado's DWR structure records; a small number of named reservoirs use clearly labeled approximate interior points from official USGS waterbody polygons when DWR's coordinate is blank. A point only appears after the state's structure record has been individually verified against a company — see how we verify.

Coordinates normally come from Colorado DWR structure records. When DWR lacks a point for an exact-name reservoir, DitchBook may publish an approximate interior point from the official USGS NHD waterbody polygon; those popups are labeled and never claim to mark a surveyed dam, outlet, or legal diversion point. Zoomed out, each company shows one representative pin. Zoomed in (past county level), every individually verified structure with a publishable point appears on its own — the structures published so far, for the matched companies — and, for a hand-reviewed set, the ditch alignment itself. Companies without a verified match or a defensible point aren't plotted yet; browse the full company directory for all of them. Address search uses the U.S. Census Bureau's public geocoder — see Ditch Finder for the same lookup with full results.