Colorado Dams
1,962 dams tracked by the National Inventory of Dams
Total Dams
1,962
High Hazard
451
23%
Poor / Unsatisfactory
119
Average Age
84 yrs
Hazard Classification
High451 (23.0%)
Significant294 (15.0%)
Low1,217 (62.0%)
Condition Assessment
Satisfactory691 (35.2%)
Fair533 (27.2%)
Poor / Unsatisfactory119 (6.1%)
Not Rated619 (31.5%)
Federal
141
State
80
Local
416
Private
1,221
Tallest Dams
- Morrow Point Dam468 ft
- Ten Mile Pond #3 Dam416 ft
- Blue Mesa Dam390 ft
- Gross 350 ft
- Ridgway Dam330 ft
High Hazard Dams
- Morrow Point DamHigh
- Ten Mile Pond #3 DamHigh
- Blue Mesa DamHigh
- Gross High
- Ridgway DamHigh
Poor Condition Dams
- SanchezUnsatisfactory
- Narraguinnep - Main DamUnsatisfactory
- Stillwater #1Unsatisfactory
- MiramonteUnsatisfactory
- Spring CreekUnsatisfactory
All Dams in Colorado
Showing 1376–1400 of 1,962
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Oklahoma Lake Weld County | 18 | 1891 | Low | Fair |
| Olds Weld County | 23 | 1918 | Low | Not Rated |
| Oligarchy #1 Boulder County | 33 | 1889 | Significant | Satisfactory |
| Olsen #1 Eagle County | 38 | — | Low | Unsatisfactory |
| Olympus Dam Larimer County | 70 | 1949 | High | Not Available |
| OMID Regulating Reservoir Mesa County | 51 | 2016 | Low | Not Available |
| Onion Valley Montrose County | 110 | 1954 | High | Fair |
| Ordway Town Res. Cell No. 2 Crowley County | 19 | 1935 | Low | Fair |
| Orlando #2 Huerfano County | 30 | 1905 | Low | Not Rated |
| Oso Diversion Dam Archuleta County | 51 | 1970 | Low | Not Available |
| Ostrich Dam Conejos County | 17 | 1964 | Low | Not Rated |
| Ott Reservoir Fremont County | 31 | 1895 | Low | Unsatisfactory |
| Overland #1 Delta County | 85 | 1987 | High | Fair |
| Overman Routt County | 10 | 1907 | Low | Not Rated |
| Owens Delta County | 24 | 1910 | Low | Fair |
| Owens #1 Huerfano County | 12 | — | Low | Fair |
| Owens #2 Huerfano County | 15 | 1901 | Low | Satisfactory |
| Pagosa Archuleta County | 33 | 1974 | Low | Not Rated |
| Pala Dura Huerfano County | 20 | 1979 | Low | Fair |
| Palisade #3 Mesa County | 29 | 1928 | Low | Not Rated |
| Palisade Cabin Mesa County | 113 | 1956 | High | Fair |
| Palmer Lake #2 El Paso County | 50 | 1904 | High | Satisfactory |
| Palmer Lake #5 El Paso County | 35 | 1906 | Significant | Satisfactory |
| Panama No. 1 - East Boulder County | 51 | 1904 | Significant | Satisfactory |
| Panama No. 1 - Northeast Boulder County | 12 | 1904 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.