Ralston #1 is an earth dam located in Garfield County, Colorado, built in 1904. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 200 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 Ralston #1
The primary purpose of Ralston #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ranch at Coulter Creek HOA (levin, Robbie) (private). It impounds the West Coulter Creek-tr near Glenwood Springs.
The dam stands 20 feet tall and stretches 200 feet across, creates a reservoir covering 5 acres, and has a maximum storage capacity of 70 acre-feet. 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. The most recent inspection on record was 06/09/2021.
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Location
| State | Colorado |
| County | Garfield |
| Nearest City | Glenwood Springs |
| River/Stream | West Coulter Creek-tr |
| Coordinates | 39.51500, -107.14223 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 59 acre-ft |
| Surface Area | 5 acres |
| Max Discharge | 64 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Ranch at Coulter Creek HOA (levin, Robbie) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/09/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01922 |
| Federal ID | CO01922 |
| More Info | State Dam Safety Program |