Montgomery
Montgomery is a rockfill dam located in Park County, Colorado, built in 1956. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Montgomery
The primary purpose of Montgomery 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 Colorado Springs Utilities (local government). It impounds the Middle Fork S. Platte near Alma.
The dam stands 112 feet tall and stretches 1,850 feet across, creates a reservoir covering 95 acres, has a maximum storage capacity of 6,100 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1956, the structure is well into its service life at over 50 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 08/18/2022.
At 112 feet, this dam is taller than 98% 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 | Park |
| Nearest City | Alma |
| River/Stream | Middle Fork S. Platte |
| Coordinates | 39.35334, -106.07390 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 112 ft |
| Dam Height | 108 ft |
| Dam Length | 1,850 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 6,100 acre-ft |
| Max Storage | 6,100 acre-ft |
| Normal Storage | 5,088 acre-ft |
| Surface Area | 95 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 7,223 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | COLORADO SPRINGS UTILITIES |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/18/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00372 |
| Federal ID | CO00372 |
| More Info | State Dam Safety Program |