Map of All 870 Utah Dams
Utah has 870 dams in the National Inventory of Dams — and 281 are classified as high hazard (32% of the state’s total), meaning failure would likely cause loss of life. 13 Utah dams are both high-hazard and in poor or unsatisfactory condition.
Use the interactive Utah dams map below to explore every dam in the state, color-coded by hazard level. Click any dam for its condition assessment, last inspection date, and Emergency Action Plan status. Or view the full US Dams interactive map to compare Utah to every other state.
Hazard
Condition
Purpose
Utah Dams by the Numbers
- 870 total dams in Utah
- 281 high hazard — failure would likely cause loss of life
- 322 significant hazard
- 266 low hazard
- 18 in poor or unsatisfactory condition (17 poor, 1 unsatisfactory)
- 13 Utah dams are both high-hazard AND in poor/unsatisfactory condition
Data source: US Army Corps of Engineers, National Inventory of Dams (NID).
The Tallest Dams in Utah
The tallest dam in Utah is Flaming Gorge Dam at 502 feet, completed in 1964. The 10 tallest Utah dams from the National Inventory of Dams:
| Dam | Height | Year | Primary Purpose | Condition | County |
|---|---|---|---|---|---|
| Flaming Gorge Dam | 502 ft | 1964 | Flood Risk Reduction | Not Available | Daggett |
| Jordanelle Dam | 391 ft | 1993 | Water Supply | Not Available | Wasatch |
| Upper Stillwater Dam | 292 ft | 1987 | Irrigation | Not Available | Duchesne |
| Soldier Creek Dam | 272 ft | 1974 | Irrigation | Not Available | Wasatch |
| Barrick Mercur Reservation Cnyn Tailings | 270 ft | 1984 | Tailings | Not Rated | Tooele |
| East Canyon Dam | 260 ft | 1966 | Flood Risk Reduction | Not Available | Morgan |
| Lost Creek Dam | 248 ft | 1966 | Irrigation | Not Available | Morgan |
| Deer Creek Dam | 240 ft | 1941 | Irrigation | Not Available | Wasatch |
| Simplot Phosphates Tailings Dam | 230 ft | 1973 | – | Not Rated | Uintah |
| Pacificorp – Electric Lake | 229 ft | 1974 | Water Supply | Satisfactory | Emery |
High-Hazard Utah Dams in Poor Condition
The most concerning dams are those classified as high-hazard that also carry a Poor or Unsatisfactory condition rating — 13 dams in Utah. Notable examples:
- Mountain Dell (105 ft, Salt Lake County) — Water Supply, Poor condition
- Birch Creek No. 2 (101 ft, Rich County) — Irrigation, Poor condition
- Bottle Hollow – South Dam (90 ft, Uintah County) — Irrigation, Poor condition
- Bottle Hollow – North Dam (82 ft, Uintah County) — Irrigation, Poor condition
- Lake Mary-Phoebe (72 ft, Salt Lake County) — Water Supply, Poor condition
Filter the interactive US Dams map by hazard and condition to see all of them on one view.
Dam Safety in Utah
Dam safety in Utah is overseen by the state dam safety program, in coordination with federal regulators: the US Army Corps of Engineers, the Bureau of Reclamation (for federal water projects), the Tennessee Valley Authority where applicable, and the Federal Energy Regulatory Commission (FERC) for licensed hydropower dams. Emergency Action Plans are typically required for high-hazard dams under state regulations.
Frequently Asked Questions
How many dams are in Utah?
Utah has 870 dams in the National Inventory of Dams tracked by the US Army Corps of Engineers: 281 high hazard, 322 significant hazard, and 266 low hazard.
What is the tallest dam in Utah?
The tallest dam in Utah is Flaming Gorge Dam at 502 feet, completed in 1964. It is primarily a flood risk reduction structure.
How many Utah dams are in poor condition?
18 Utah dams are currently rated as being in Poor or Unsatisfactory condition. Of those, 13 are also classified as high-hazard — meaning failure would likely cause loss of life.
