Ob-3 Warden Digester Lagoon
Ob-3 Warden Digester Lagoon is an earth dam located in Grant County, Washington, built in 2018. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Ob-3 Warden Digester Lagoon
Ob-3 Warden Digester Lagoon is a dam in Grant, Washington. The dam is owned by Ob-3 Resource Management Llc (private).
The dam stands 21 feet tall, has a maximum storage capacity of 95 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 2018, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam.
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 Washington 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 | Washington |
| County | Grant |
| Nearest City | Warden |
| Coordinates | 46.97881, -119.05858 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Year Completed | 2018 (8 years old) |
Storage & Hydraulics
| NID Storage | 95 acre-ft |
| Max Storage | 95 acre-ft |
| Normal Storage | 77 acre-ft |
| Drainage Area | 6 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | OB-3 Resource Management LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00756 |
| Federal ID | WA00756 |
| More Info | State Dam Safety Program |