Sedimentation Pond Hg-4 is an earth dam located in Routt County, Colorado, built in 1979. It carries a Low hazard potential classification.
Dam profile
NID height · 55 ft55 ft tall and 530 ft long, taller than 94% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Sedimentation Pond Hg-4
Sedimentation Pond Hg-4 is a dam in Routt, Colorado. The dam is owned by H. G. Coal Co. (private). It impounds the Hayden Gulch-os near Hamilton.
The dam stands 55 feet tall and stretches 530 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 44 acre-feet. Completed in 1979, the structure is 47 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. The most recent inspection on record was 01/01/1991. That was over 35 years ago.
At 55 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Colorado |
| County | Routt |
| Nearest City | Hamilton |
| River/Stream | Hayden Gulch-os |
| Coordinates | 40.35334, -107.29557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 55 ft |
| Dam Height | 35 ft |
| Dam Length | 530 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 44 acre-ft |
| Max Storage | 44 acre-ft |
| Normal Storage | 18 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 654 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | H. G. Coal Co. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 01/01/1991 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO02223 |
| Federal ID | CO02223 |
| More Info | State Dam Safety Program |