Jones
Jones is an earth dam located in Grand County, Colorado, built in 1937. It carries a Significant hazard potential classification and has a fair condition assessment.
About Jones
The primary purpose of Jones is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Blue Valley Ranch (private). It impounds the Henry Creek near State Bridge.
The dam stands 39 feet tall and stretches 370 feet across, creates a reservoir covering 6 acres, and has a maximum storage capacity of 111 acre-feet. Completed in 1937, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/03/2021.
At 39 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Colorado |
| County | Grand |
| Nearest City | State Bridge |
| River/Stream | Henry Creek |
| Coordinates | 39.94834, -106.46223 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 370 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 111 acre-ft |
| Max Storage | 111 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 6 acres |
| Max Discharge | 729 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | BLUE VALLEY RANCH |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/03/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00689 |
| Federal ID | CO00689 |
| More Info | State Dam Safety Program |