What we know
Irrigation dam on Cherry Creek, built by a private company about 1890 ('The Castlewood reservoir, recently completed', 1893); it failed on Aug. 3, 1933 and flooded Cherry Creek to Denver.
Where it was
USGS GNIS Dam 185107
The U.S. Geological Survey's official point for this place name.
Sources
Sources are named in the text above. Numbers such as S-0080 refer to our source list. Most newspaper quotations were read in the Colorado Historic Newspapers Collection. Long quotations from recent books are shortened here.