Hallenbeck #1
Hallenbeck #1 is an earth dam located in Mesa County, Colorado, built in 1970. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Hallenbeck #1
The primary purpose of Hallenbeck #1 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 City Of Grand Junction (local government). It impounds the Kahnah Creek-tr near Whitewater.
The dam stands 43 feet tall and stretches 1,000 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 1,155 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1970, 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 05/06/2022.
At 43 feet, this dam is taller than 89% of dams nationwide.
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 | Mesa |
| Nearest City | Whitewater |
| River/Stream | Kahnah Creek-tr |
| Coordinates | 38.96927, -108.29387 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 41 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 1,155 acre-ft |
| Max Storage | 1,155 acre-ft |
| Normal Storage | 659 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,036 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF GRAND JUNCTION |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/06/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00085 |
| Federal ID | CO00085 |
| More Info | State Dam Safety Program |