Oldest Dams in Colorado

Colorado has 1899 dams with recorded construction dates. The oldest dates to 1863 — 163 years ago. Colorado's earliest dams were built in the 19th century, an era of westward expansion, irrigation development, and early water infrastructure. Older dams require particular attention for safety, as many were built before modern engineering standards.

#	Dam	County	Year Built	Age	Height (ft)	Hazard	Condition
1	Hyatt	Jefferson	1863	163 yrs	24	High	Unsatisfactory
2	Waneka	Boulder	1865	161 yrs	31	High	Satisfactory
3	Pleasant Valley	Boulder	1868	158 yrs	19	High	Satisfactory
4	Churches	Jefferson	1868	158 yrs	9	Low	Not Rated
5	Broad	Jefferson	1870	156 yrs	13	Low	Satisfactory
6	Greenview	Pueblo	1870	156 yrs	8	Low	Not Rated
7	Fairview # 1	Jefferson	1871	155 yrs	12	Low	Satisfactory
8	Bergen East	Jefferson	1874	152 yrs	40	High	Satisfactory
9	Dodd	Boulder	1875	151 yrs	12	Low	Satisfactory
10	Lake Minnequa	Pueblo	1876	150 yrs	16	Low	Satisfactory
11	Mann	Jefferson	1877	149 yrs	15	Low	Satisfactory
12	Lagerman	Boulder	1878	148 yrs	36	High	Satisfactory
13	Baxter	Weld	1878	148 yrs	8	Low	Not Rated
14	Mulligan	Weld	1878	148 yrs	10	Low	Fair
15	Divide	Boulder	1879	147 yrs	8	Low	Not Rated
16	Calkins	Boulder	1879	147 yrs	8	Low	Not Rated
17	Prince No. 1	Boulder	1879	147 yrs	14	Low	Satisfactory
18	Gold Lake #1	Boulder	1879	147 yrs	24	Significant	Satisfactory
19	Gold Lake #2	Boulder	1879	147 yrs	19	Significant	Satisfactory
20	Gold Lake #3	Boulder	1879	147 yrs	9	Significant	Satisfactory
21	Jones #1	Grand	1879	147 yrs	27	Significant	Satisfactory
22	Clennon	Weld	1879	147 yrs	14	Significant	Satisfactory
23	Highland #1	Weld	1879	147 yrs	17	Significant	Satisfactory
24	Marfell Lake No. 1	Boulder	1880	146 yrs	12	Low	Not Rated
25	Water Supply No 4	Larimer	1880	146 yrs	33	High	Satisfactory
26	Crystal	Boulder	1881	145 yrs	11	Low	Not Rated
27	Highland #2 (south)	Boulder	1881	145 yrs	41	Significant	Satisfactory
28	Highland #2 (north)	Boulder	1881	145 yrs	41	Significant	Satisfactory
29	Culver	Larimer	1881	145 yrs	19	Low	Unsatisfactory
30	Highland #3	Weld	1881	145 yrs	21	Significant	Satisfactory
31	Bolts Lake	Eagle	1882	144 yrs	22	Low	Fair
32	La Veta Lake North	Huerfano	1882	144 yrs	20	Significant	Fair
33	Rist Canyon	Larimer	1882	144 yrs	12	Low	Not Rated
34	Warren Lake	Larimer	1882	144 yrs	23	High	Satisfactory
35	Fairport	Larimer	1882	144 yrs	13	Significant	Satisfactory
36	Lone Tree	Larimer	1882	144 yrs	29	Significant	Satisfactory
37	Minnie	Weld	1882	144 yrs	10	Low	Not Rated
38	Logan	Weld	1882	144 yrs	10	Low	Not Rated
39	Hummel	Weld	1882	144 yrs	15	Low	Fair
40	Koenig	Weld	1882	144 yrs	9	Low	Not Rated
41	Donath Lake	Larimer	1883	143 yrs	26	Significant	Satisfactory
42	De France	Weld	1883	143 yrs	15	Low	Fair
43	Buckhorn Lake #2	Montrose	1884	142 yrs	30	Low	Fair
44	John Townsend	El Paso	1885	141 yrs	60	Low	Poor
45	Mower	Jefferson	1885	141 yrs	11	Low	Not Rated
46	Dixon Canyon	Larimer	1885	141 yrs	14	Significant	Satisfactory
47	Box Elder #2	Larimer	1885	141 yrs	13	Low	Satisfactory
48	North Poudre #1	Larimer	1885	141 yrs	16	Significant	Satisfactory
49	Rockwell	Weld	1885	141 yrs	16	Low	Fair
50	Ide And Starbird #2	Weld	1885	141 yrs	10	Low	Not Rated

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