Three Rivers Mill Pond Dam dam
Three Rivers Mill Pond Dam
The Three Rivers Mill Pond Dam, located in Snohomish, Washington, is a privately owned structure that serves multiple purposes, including fire protection and creating a stock or small fish pond. Built in 1946, this earth dam stands at a hydraulic height of 10 feet and a structural height of 8 feet, with a length of 1000 feet. The dam has a storage capacity of 56 acre-feet and covers a surface area of 7 acres, with a drainage area of 0.2 square miles.
Managed by the Washington Dept of Ecology, the Three Rivers Mill Pond Dam is state regulated, inspected, and enforced to ensure its safety and compliance with regulations. Despite its low hazard potential, the dam's condition assessment is currently not rated, indicating a need for further evaluation. While the dam does not have a spillway or outlet gates, it remains an important structure in the region for water resource management and environmental conservation efforts.
With its strategic location along the Sauk River-Offstream and its contribution to local water storage and management, the Three Rivers Mill Pond Dam underscores the importance of maintaining and monitoring dams for both human and ecological well-being. As water resource and climate enthusiasts, it is essential to recognize the role of such structures in balancing water supply, flood control, and habitat preservation, while also ensuring their safety and compliance with regulatory standards to mitigate potential risks and ensure sustainable water management practices in the region.
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 Three Rivers Mill Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Sauk River At Darrington | 5,220 cfs | → |
| Sauk River Ab Whitechuck River Near Darrington | 1,110 cfs | → |
| Sauk River Near Sauk | 4,070 cfs | → |
| Skagit River Near Concrete | 14,000 cfs | → |
| Cascade River At Marblemount | 1,120 cfs | → |
| Skagit River At Marblemount | 4,130 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Three Rivers Mill Pond Dam.
Boat launches
- Lower Sauk Boat Launch
- White Chuck Boat Launch
- West Lake Riley Road Snohomish County
- North Cascades Highway 49341, Concrete
- Marblemount Boat Launch
- Baker River Road 6323, Concrete
Campgrounds
- Squire Creek County Park
- Squire Creek Park & Campground
- William C. Dearinger- State Forest
- Sauk Park
- Peek-A-Boo Lake Campsites
- Buck Creek
Paddle runs
- Glacier Peak Wilderness Boundary To Confluence With Sauk River
- Boulder River Wilderness Boundary To Confluence With Stillaguamish River
- Headwaters In Sw1/4 Of Sec 7, T31n, R9e To Boulder River Wilderness Boundary
- Glacier Peak Wilderness Boundary To Confluence With Suiattle River
- Headwaters In Ne1/4 Of Sec 4, T33n, R12e To Glacier Peak Wilderness Boundary
- Glacier Peak Wilderness Boundary To Confluence With Skagit River
Track Three Rivers Mill Pond 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 Three Rivers Mill Pond Dam
Where does the data for Three Rivers Mill Pond 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 Low 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 Three Rivers Mill Pond Dam.