Mann is an earth dam located in Jefferson County, Colorado, built in 1877. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 15 ft15 ft tall and 400 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 Mann
The primary purpose of Mann is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Carruth Properties Company (carruth, Dennis) (private). It impounds the Dochan Gulch near Littleton.
The dam stands 15 feet tall and stretches 400 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 98 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1877, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/15/2007. That was over 19 years ago.
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Location
| State | Colorado |
| County | Jefferson |
| Nearest City | Littleton |
| River/Stream | Dochan Gulch |
| Coordinates | 39.56341, -105.15221 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 400 ft |
| Year Completed | 1877 (149 years old) |
Storage & Hydraulics
| NID Storage | 98 acre-ft |
| Max Storage | 98 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 575 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | Carruth Properties Company (carruth, Dennis) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/15/2007 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01161 |
| Federal ID | CO01161 |
| More Info | State Dam Safety Program |