Great Falls

Latest Operating Information
WARNING! Water release schedules can change without notice due to unanticipated weather changes or power system requirements. Large amounts of water could be discharged at any time. Use caution! Obey all posted safety regulations and precautions!  Vital safety information.

Generation Releases

Caption
Day Time Period Generators
7/16/2018 midnight - 1pm 0
7/16/2018 1pm - 5pm 1
7/16/2018 5pm - midnight 0

Observed Data

Caption
Day Time (Eastern) Reservoir Elevation (behind dam)* Tailwater Elevation (below dam)* Average Hourly Discharge*
7/14/2018 2 AM 799.16 650.44 160
7/14/2018 3 AM 799.17 650.41 160
7/14/2018 4 AM 799.20 650.37 160
7/14/2018 5 AM 799.21 650.34 160
7/14/2018 6 AM 799.22 650.32 160
7/14/2018 7 AM 799.24 650.30 160
7/14/2018 8 AM 799.26 650.28 160
7/14/2018 9 AM 799.27 650.26 160
7/14/2018 10 AM 799.29 650.24 160
7/14/2018 11 AM 799.31 650.22 160
7/14/2018 noon 799.32 650.20 160
7/14/2018 1 PM 799.29 650.39 208
7/14/2018 2 PM 799.31 653.33 1,538
7/14/2018 3 PM 799.29 653.33 1,536
7/14/2018 4 PM 799.24 653.33 1,539
7/14/2018 5 PM 799.22 653.33 1,537
7/14/2018 6 PM 799.17 653.32 1,534
7/14/2018 7 PM 799.13 653.32 1,534
7/14/2018 8 PM 799.15 650.88 196
7/14/2018 9 PM 799.14 650.66 160
7/14/2018 10 PM 799.17 650.56 160
7/14/2018 11 PM 799.19 650.50 160
7/14/2018 midnight 799.19 650.44 160
7/15/2018 1 AM 799.21 650.40 160
7/15/2018 2 AM 799.22 650.37 160
7/15/2018 3 AM 799.24 650.35 160
7/15/2018 4 AM 799.25 650.32 160
7/15/2018 5 AM 799.27 650.29 160
7/15/2018 6 AM 799.28 650.27 160
7/15/2018 7 AM 799.29 650.25 160
7/15/2018 8 AM 799.31 650.23 160
7/15/2018 9 AM 799.32 650.21 160
7/15/2018 10 AM 799.33 650.19 160
7/15/2018 11 AM 799.34 650.18 160
7/15/2018 noon 799.35 650.17 160
7/15/2018 1 PM 799.37 650.16 160
7/15/2018 2 PM 799.34 650.36 206
7/15/2018 3 PM 799.33 653.31 1,523
7/15/2018 4 PM 799.32 653.33 1,525
7/15/2018 5 PM 799.29 653.35 1,549
7/15/2018 6 PM 799.23 653.34 1,548
7/15/2018 7 PM 799.26 650.88 198
7/15/2018 8 PM 799.26 650.60 160
7/15/2018 9 PM 799.27 650.53 160
7/15/2018 10 PM 799.30 650.48 160
7/15/2018 11 PM 799.30 650.44 160
7/15/2018 midnight 799.30 650.41 160
7/16/2018 1 AM 799.33 650.37 160

Predicted Data

Caption
Day Average Inflow* Midnight Elevation* Average Outflow*
7/16/2018 685 800.07 225
7/17/2018 1,150 799.80 1,380
7/18/2018 990 799.80 990

*Elevations are in feet above sea level. Discharges are in cubic feet per second and are reported at the end of the hour.

Notes:

Water release schedules are updated periodically throughout the day. Next-day release schedules are usually available by 6 p.m. of the current day.

Observed water levels also are updated periodically throughout the day. Predicted water levels are updated at least once a day, by 1 p.m. Eastern time, and may be updated more frequently when conditions warrant.

More Information on Great Falls

Operating Guide

General Overview

Sport Fish Survey Results

 

 

Reservoir Information

Get the most up-to-date information for the reservoirs, including today’s lake levels, predicted elevations, planned releases, reservoir operating guides, ecological health ratings, fish survey results, recreation facilities and more.

 

 

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