Mountain Supply # 9
Mountain Supply # 9 is an earth dam located in Larimer County, Colorado, built in 1907. It carries a Low hazard potential classification and has a fair condition assessment.
About Mountain Supply # 9
The primary purpose of Mountain Supply # 9 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by North Poudre Irr. Co. (moen, Tad) (private). It impounds the N. Fork Cache La Poudre near Fort Collins.
The dam stands 24 feet tall and stretches 400 feet across, creates a reservoir covering 57 acres, and has a maximum storage capacity of 413 acre-feet. Completed in 1907, 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. The most recent inspection on record was 08/19/2020.
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Location
| State | Colorado |
| County | Larimer |
| Nearest City | Fort Collins |
| River/Stream | N. Fork Cache La Poudre |
| Coordinates | 40.67834, -105.07057 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 400 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 413 acre-ft |
| Max Storage | 413 acre-ft |
| Normal Storage | 413 acre-ft |
| Surface Area | 57 acres |
| Max Discharge | 14,200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | NORTH POUDRE IRR. CO. (MOEN, TAD) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/19/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO02039 |
| Federal ID | CO02039 |
| More Info | State Dam Safety Program |