Grand Mesa #9
Grand Mesa #9 is an earth dam located in Mesa County, Colorado, built in 1904. It carries a Low hazard potential classification and has a fair condition assessment.
About Grand Mesa #9
The primary purpose of Grand Mesa #9 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 near Grand Junction.
The dam stands 15 feet tall and stretches 600 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 268 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1904, the structure is over a century 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. 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 08/20/2019.
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Location
| State | Colorado |
| County | Mesa |
| Nearest City | Grand Junction |
| River/Stream | Kahnah Creek |
| Coordinates | 39.03000, -108.06723 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 600 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 268 acre-ft |
| Max Storage | 268 acre-ft |
| Normal Storage | 153 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 186 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GRAND MESA RESERVOIR CO. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/20/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00828 |
| Federal ID | CO00828 |
| More Info | State Dam Safety Program |