Henderson Lake is an earth dam located in La Plata County, Colorado, built in 1967. It carries a Significant hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 200 ft long, taller than 76% of U.S. dams with a recorded height. 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 Henderson Lake
The primary purpose of Henderson Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Usda Fs (federal). It impounds the Pole Creek near Hermosa.
The dam stands 33 feet tall and stretches 200 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 126 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 07/09/2013. That was over 13 years ago.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Colorado |
| County | La Plata |
| Nearest City | Hermosa |
| River/Stream | Pole Creek |
| Coordinates | 37.51200, -107.72704 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 31 ft |
| Dam Length | 200 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 126 acre-ft |
| Max Storage | 126 acre-ft |
| Normal Storage | 58 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 498 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Usda Fs |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/09/2013 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01063 |
| Federal ID | CO01063 |
| More Info | State Dam Safety Program |