J-ditch Effluent Lagoon
J-ditch Effluent Lagoon is a dam located in Valley County, Idaho, built in 2001. It carries a High hazard potential classification and has a fair condition assessment.
About J-ditch Effluent Lagoon
J-ditch Effluent Lagoon is a dam in Valley, Idaho. The dam is local government-owned. It impounds the Unnamed Stream North Fork Payette River near Lake Fork.
The dam stands 60 feet tall and stretches 3,858 feet across, creates a reservoir covering 21 acres, has a storage capacity of 645 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2001, the structure is relatively new.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/15/2020.
At 60 feet, this dam is taller than 95% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Idaho dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Idaho |
| County | Valley |
| Nearest City | Lake Fork |
| River/Stream | Unnamed Stream North Fork Payette River |
| Coordinates | 44.89720, -116.12000 |
Physical Characteristics
| NID Height | 60 ft |
| Dam Height | 42 ft |
| Dam Length | 3,858 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 645 acre-ft |
| Normal Storage | 645 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/15/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ID00493 |
| Federal ID | ID00493 |
| More Info | State Dam Safety Program |