Upper Chinns
Upper Chinns is an earth dam located in Clear Creek County, Colorado, built in 1937. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Upper Chinns
The primary purpose of Upper Chinns is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Agricultural Ditch & Reservoir Company (acker, Pet (private). It impounds the Fall River-tr near Idaho Springs.
The dam stands 29 feet tall and stretches 420 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 138 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1937, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/11/2017.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Clear Creek |
| Nearest City | Idaho Springs |
| River/Stream | Fall River-tr |
| Coordinates | 39.81672, -105.69815 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 22 ft |
| Dam Length | 420 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 138 acre-ft |
| Max Storage | 138 acre-ft |
| Normal Storage | 92 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 882 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | AGRICULTURAL DITCH & RESERVOIR COMPANY (ACKER, PET |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/11/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00190 |
| Federal ID | CO00190 |
| More Info | State Dam Safety Program |