Giffin #1 (lower)
Giffin #1 (lower) is an earth dam located in Weld County, Colorado, built in 1948. It carries a Low hazard potential classification and has a fair condition assessment.
About Giffin #1 (lower)
The primary purpose of Giffin #1 (lower) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Gms Land And Cattle (gertsch, Mj) (private). It impounds the Lone Tree Creek near Nunn.
The dam stands 17 feet tall and stretches 575 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 109 acre-feet, and collects water from a drainage area of 57 square miles. Completed in 1948, the structure is well-established, with more than 75 years of service.
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 04/14/2016.
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Location
| State | Colorado |
| County | Weld |
| Nearest City | Nunn |
| River/Stream | Lone Tree Creek |
| Coordinates | 40.83056, -104.82529 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 575 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 109 acre-ft |
| Max Storage | 109 acre-ft |
| Normal Storage | 49 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 57 sq mi |
| Max Discharge | 8,060 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | GMS LAND AND CATTLE (GERTSCH, MJ) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/14/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO01102 |
| Federal ID | CO01102 |
| More Info | State Dam Safety Program |