Leader Lake Dam dam
Leader Lake Dam
Leader Lake Dam, located in Malott, Washington, is a privately-owned structure regulated by the Washington Department of Ecology. Built in 1910, this earth dam stands at a height of 61 feet and spans 350 feet in length, serving primarily for recreational purposes. With a storage capacity of 7681 acre-feet and a drainage area of 3.1 square miles, the dam poses a high hazard potential but has been assessed as satisfactory in condition.
The dam, situated on Tr-Tallant Creek, is known for its scenic beauty and recreational opportunities, drawing water resource and climate enthusiasts alike. Despite its age, Leader Lake Dam has undergone regular inspections, with the most recent assessment conducted in August 2021. The dam's emergency action plan status and risk management measures remain undisclosed, leaving room for further exploration and evaluation by interested parties.
As part of Congressional District 04 in Washington, Leader Lake Dam falls under the oversight of Representative Dan Newhouse (R) and the Seattle District of the US Army Corps of Engineers. The dam's location in Okanogan County adds to its appeal as a destination for outdoor enthusiasts seeking to explore the intersection of water resources and climate impacts in the Pacific Northwest. With its historical significance and ongoing regulatory oversight, Leader Lake Dam presents a compelling case study for those interested in the sustainable management of water infrastructure in a changing climate.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Leader Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Okanogan River At Malott | 4,980 cfs | → |
| Omak Creek Near Omak | 3 cfs | → |
| Methow River At Twisp | 3,590 cfs | → |
| Twisp River Near Twisp | 801 cfs | → |
| Okanogan River Near Tonasket | 5,040 cfs | → |
| Methow River At Winthrop | 2,870 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Leader Lake Dam.
Boat launches
- Okanogan County
- Green Lake Road 50-374, Okanogan
- Dewberry Avenue East 526, Omak
- Conconully Road Conconully
- Sinlahekin Road 100-144, Okanogan
- Sinlahekin Road, Okanogan
Campgrounds
- Leader Lake- State Forest
- Rock Creek- State Forest
- Sportsmans Camp- State Forest
- Okanogan County Fairground
- American Legion City Park Campsite
- Legion Rv Park - Okanogan
Paddle runs
- Salmon Creek
- Private Land Boundary To Okanogan Nf Boundary
- Pasayten Wilderness Boundary To Okanogan Nf Boundary
- Lake Chelan-Sawtooth Wilderness Boundary To Okanogan Nf Boundary
- Confluence Of South Fork Wolf Creek To Lake Chelan-Sawtooth Wilderness Boundary
- Lake Chelan-Sawtooth Wilderness Boundary To Private Land Boundary Near Lime Creek In Se1/4 Of Sec 18, T33n, R20e
Track Leader Lake Dam in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Leader Lake Dam
Where does the data for Leader Lake Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Leader Lake Dam.