Scales #3 (upper) is an earth dam located in Mesa County, Colorado, built in 1969. It carries a Low hazard potential classification.
Dam profile
NID height · 9 ft9 ft tall and 350 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 #3 (upper)
The primary purpose of Scales #3 (upper) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by City of Grand Junction (local government). It impounds the Kahnah Creek-tr near Grand Junction.
The dam stands 9 feet tall and stretches 350 feet across, creates a reservoir covering 45 acres, and has a maximum storage capacity of 242 acre-feet. Completed in 1969, 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 | 39.04501, -108.01723 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 7 ft |
| Dam Length | 350 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 242 acre-ft |
| Max Storage | 242 acre-ft |
| Normal Storage | 130 acre-ft |
| Surface Area | 45 acres |
| Max Discharge | 681 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | City of Grand Junction |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/23/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00109 |
| Federal ID | CO00109 |
| More Info | State Dam Safety Program |