Pond 7 Dam
Pond 7 Dam is a rockfill dam located in City and Borough of Juneau, Alaska, built in 2005. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Pond 7 Dam
The primary purpose of Pond 7 Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Hecla Greens Creek Mining Company (private).
The dam stands 30 feet tall and stretches 780 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 32 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2005, the structure is relatively new.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/09/2019.
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Location
| State | Alaska |
| County | City and Borough of Juneau |
| Coordinates | 58.11500, -134.75050 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 780 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 32 acre-ft |
| Max Storage | 32 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 70 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | HECLA GREENS CREEK MINING COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/09/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | AK00307 |
| Federal ID | AK00307 |
| More Info | State Dam Safety Program |