Hayden's Drainage Map of Colorado, 1877

Hayden's Drainage Map of Colorado, 1877

This drainage map is one of the many maps prepared by the Hayden Survey after establishing baseline distances. It is the first systematic, state-wide map of Colorado's water resources.  However, by the time this map was published, almost all of Boulder's ditches had already been built, and the Boulder Creek drainage was almost fully appropriated.

Map courtesy of the Honorable Greg Hobbs Collection


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