Lemansany Detention No. 2 is an earth dam located in El Paso County, Colorado, built in 1973. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 848 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 Lemansany Detention No. 2
The primary purpose of Lemansany Detention No. 2 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Susan Hare (private). It impounds the Big Sandy Creek-tr near Ramah.
The dam stands 23 feet tall and stretches 848 feet across, creates a reservoir covering 9 acres, and has a maximum storage capacity of 93 acre-feet. Completed in 1973, 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. 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 10/09/2014. That was over 12 years ago.
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Location
| State | Colorado |
| County | El Paso |
| Nearest City | Ramah |
| River/Stream | Big Sandy Creek-tr |
| Coordinates | 39.11834, -104.33557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 19 ft |
| Dam Length | 848 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 93 acre-ft |
| Max Storage | 93 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 9 acres |
| Max Discharge | 3,823 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Susan Hare |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/09/2014 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00750 |
| Federal ID | CO00750 |
| More Info | State Dam Safety Program |