Scales #1 (lower) is an earth dam located in Mesa County, Colorado, built in 1959. It carries a Low hazard potential classification.
Dam profile
NID height · 12 ft12 ft tall and 360 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Scales #1 (lower)
The primary purpose of Scales #1 (lower) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Grand Mesa Reservoir Co. (private). It impounds the Kahnah Creek-tr near Grand Junction.
The dam stands 12 feet tall and stretches 360 feet across, creates a reservoir covering 55 acres, and has a maximum storage capacity of 479 acre-feet. Completed in 1959, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 07/23/2019.
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Location
| State | Colorado |
| County | Mesa |
| Nearest City | Grand Junction |
| River/Stream | Kahnah Creek-tr |
| Coordinates | 39.04000, -108.02723 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 10 ft |
| Dam Length | 360 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 479 acre-ft |
| Max Storage | 479 acre-ft |
| Normal Storage | 204 acre-ft |
| Surface Area | 55 acres |
| Max Discharge | 441 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Grand Mesa Reservoir Co. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/23/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00106 |
| Federal ID | CO00106 |
| More Info | State Dam Safety Program |