Knox is an earth dam located in Delta County, Colorado, built in 1954. It carries a Low hazard potential classification.
Dam profile
NID height · 40 ft40 ft tall and 512 ft long, taller than 86% 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 Knox
The primary purpose of Knox is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Knox Reservoir Partners (hanson, Arlo) (private). It impounds the Surface Creek-tr near Cedaredge.
The dam stands 40 feet tall and stretches 512 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 335 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1954, 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. The most recent inspection on record was 09/20/2021.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Colorado |
| County | Delta |
| Nearest City | Cedaredge |
| River/Stream | Surface Creek-tr |
| Coordinates | 39.04205, -107.87819 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 31 ft |
| Dam Length | 512 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 335 acre-ft |
| Max Storage | 335 acre-ft |
| Normal Storage | 255 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 882 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Knox Reservoir Partners (hanson, Arlo) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/20/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00583 |
| Federal ID | CO00583 |
| More Info | State Dam Safety Program |