Sand Pit Dam
Sand Pit Dam is an earth dam located in City and Borough of Juneau, Alaska, built in 2016. It carries a Low hazard potential classification and has a fair condition assessment.
About Sand Pit Dam
The primary purpose of Sand Pit Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Hecla Greens Creek Mining Company (private).
The dam stands 33 feet tall, creates a reservoir covering 4 acres, and has a maximum storage capacity of 77 acre-feet. Completed in 2016, the structure is relatively new.
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 06/20/2018.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Alaska |
| County | City and Borough of Juneau |
| Coordinates | 58.14424, -134.75362 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Year Completed | 2016 (10 years old) |
Storage & Hydraulics
| NID Storage | 77 acre-ft |
| Max Storage | 77 acre-ft |
| Surface Area | 4 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | HECLA GREENS CREEK MINING COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/20/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AK00317 |
| Federal ID | AK00317 |
| More Info | State Dam Safety Program |