Daily Reservoir Data as of 12/12/2025

Pool Elevation is 4112.5 Feet
Reservoir Storage is 4006.3 Acre-Feet
Reservoir Inflow is 14.3 CFS
Reservoir Outflow is 0.0 CFS
Reservoir is 12.6 % Full*
Reservoir Flood Control Pool is filled 0.0 %
Willow Creek Flow is 0.0 CFS

Hourly Reservoir Data as of 12/14/2025 02:00

Pool Elevation is 4112.49 Feet
Reservoir Storage is 4002.28 Acre-Feet

Note: 998877. Indicates A Missing Value
* Reservoir is considered "full" when pool elevation is at top of active conservation pool. Percentage is based on total reservoir volume below that level.

Graphs for the last 30 Days of Record

• Elevation
• Content
• Inflow
• Outflow
• Inflow vs Outflow

The following data extraction and plotting routines are directly accessible by clicking the items below:

• ARC040 Daily Data for One Month
• ARC050 Daily Data for One Year
• RES070 Monthly Data for One Parameter for Period of Record
• ARCPLT Graphical Data Plots
• TEACUPS Visual Display of Current Reservoir/River Basin Data (Not Available for Some Projects)

Project Links

• Boat Launching
• Reservoir Allocation

State Links

• Montana Area Office Home Page
• Montana Lakes and Reservoir Page
• Recreation

Projects and Facilities Links

• Willow Creek Dam
• Willow Creek Reservoir at Recreation.gov