Granby #7 is an earth dam located in Delta County, Colorado, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 390 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 Granby #7
The primary purpose of Granby #7 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Granby Ditch & Reservoir Co. (thompson, Brian) (private). It impounds the Dirty George Creek-tr near Cedaredge.
The dam stands 18 feet tall and stretches 390 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 151 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1964, 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 07/19/2017.
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Location
| State | Colorado |
| County | Delta |
| Nearest City | Cedaredge |
| River/Stream | Dirty George Creek-tr |
| Coordinates | 38.99334, -108.04557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 17 ft |
| Dam Length | 390 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 151 acre-ft |
| Max Storage | 151 acre-ft |
| Normal Storage | 76 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 588 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Granby Ditch & Reservoir Co. (thompson, Brian) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/19/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00718 |
| Federal ID | CO00718 |
| More Info | State Dam Safety Program |