Mill Pond Dike dam
Mill Pond Dike
Mill Pond Dike, located in Metaline Falls, Washington, serves as a crucial infrastructure for hydroelectric power generation and recreational activities. Built in 1922, this earth dam stands at a height of 8 feet and stretches over 850 feet in length, with a storage capacity of 1,430 acre-feet. Sullivan Creek is the primary water source for this dam, which has a drainage area of 125 square miles and a maximum discharge of 4,000 cubic feet per second.
Managed by the Federal Energy Regulatory Commission, Mill Pond Dike is considered to have a high hazard potential due to its location and structure. Despite its age, the dam has not undergone recent condition assessments, but emergency action plans have been prepared and revised to ensure public safety in the event of a breach. The surrounding area spans 65 acres and offers recreational opportunities for visitors, making it a valuable asset for both water resource management and community enjoyment.
With a risk assessment rating of 2, indicating a high risk level, maintaining the integrity of Mill Pond Dike is paramount to prevent potential hazards and ensure the safety of downstream communities. Regular inspections and risk management measures are essential to mitigate any potential threats and uphold the structural stability of this vital infrastructure. As climate change continues to impact water resources, sustainable management practices will be crucial in safeguarding Mill Pond Dike and its surrounding environment for future generations.
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 Mill Pond Dike -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Outlet Creek Near Metaline Falls | 19 cfs | → |
| Pend Oreille River Below Box Canyon Near Ione | 40,700 cfs | → |
| Columbia River At International Boundary | 141,000 cfs | → |
| Priest R Outflow Nr Coolin | 605 cfs | → |
| Boundary Creek Nr Porthill Id | 499 cfs | → |
| Kootenai River At Porthill Id | 15,000 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mill Pond Dike.
Boat launches
- Sullivan Lake Road, Metaline Falls
- Linton Street, Metaline
- International Selkirk Loop, Ione
- Johnson Road 3698, Ione
- Boundary Access Road, Metaline Falls
- Ione Motel And Rv Park, Ione
Campgrounds
- Mill Pond Campground
- Mill Pond
- Sullivan Lake
- West Sullivan Campground
- West Sullivan
- East Sullivan Campground
Paddle runs
- Ne1/4 Of Sec 13, T40n, R46e To Nw1/4 Of Sec 5, T40n, R46e
- Segment 2 Flows For Almost 10 Miles From The Intersection With Trail 312 To Its Confluence With The Upper Priest River To Segment 2 Flows For Almost 10 Miles From The Intersection With Trail 312 To Its Confluence With The Upper Priest River
- Segment 1 Is Classified As Wild And Flows From Its Source For Almost Five Miles To The Intersection With Trail 312 To Segment 1 Is Classified As Wild And Flows From Its Source For Almost To The Intersection With Trail 312
- Upper Priest River
- Long Canyon Pass, Sec. 30, T63n, R2w To Forest Boundary, Road #417, Sec. 25, T63n, R2w
- Forest Boundary, Sec. 34, T59n, R2w To Harrison Lake, Sec. 31, T62n, R2w
Track Mill Pond Dike 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 Mill Pond Dike
Where does the data for Mill Pond Dike 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 Mill Pond Dike.