Leader Lake Saddle Dam is an earth dam located in Okanogan County, Washington, built in 1910. It carries a High hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 16 ft16 ft tall and 410 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Leader Lake Saddle Dam
The primary purpose of Leader Lake Saddle Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Pleasant Valley Water Users Assoc (private). It impounds the Tr-tallant Creek near Malott.
The dam stands 16 feet tall and stretches 410 feet across, creates a reservoir covering 185 acres, has a maximum storage capacity of 1,850 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1910, the structure is over a century old.
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. The most recent inspection on record was 08/10/2021.
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 | Okanogan |
| Nearest City | Malott |
| River/Stream | Tr-tallant Creek |
| Coordinates | 48.35757, -119.68721 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Length | 410 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,850 acre-ft |
| Max Storage | 1,850 acre-ft |
| Normal Storage | 1,000 acre-ft |
| Surface Area | 185 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Pleasant Valley Water Users Assoc |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/10/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00358 |
| Federal ID | WA00358 |
| More Info | State Dam Safety Program |