Strontia Springs
Strontia Springs is a concrete dam located in Douglas County, Colorado, built in 1982. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Strontia Springs
The primary purpose of Strontia Springs is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Denver Water (local government). It impounds the South Platte River near Kassler.
The dam stands 299 feet tall and stretches 650 feet across, creates a reservoir covering 98 acres, has a maximum storage capacity of 10,600 acre-feet, and collects water from a drainage area of 2,600 square miles. Completed in 1982, the structure is 44 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/29/2022.
At 299 feet, this dam is taller than 99% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Colorado dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Douglas |
| Nearest City | Kassler |
| River/Stream | South Platte River |
| Coordinates | 39.43270, -105.12620 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 299 ft |
| Dam Height | 292 ft |
| Dam Length | 650 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 10,600 acre-ft |
| Max Storage | 10,600 acre-ft |
| Normal Storage | 7,700 acre-ft |
| Surface Area | 98 acres |
| Drainage Area | 2,600 sq mi |
| Max Discharge | 55,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Denver Water |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/29/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02219 |
| Federal ID | CO02219 |
| More Info | State Dam Safety Program |