April 14, 2013
Current Koocanusa Reservoir elevation: 2,403.9 feet
Current Koocanusa Reservoir inflow: approximately 7,000 cubic feet per second
Current Libby Dam outflow: 25,200 cfs
Current Kootenai River elevation at Bonners Ferry: 1,755.9 feet
Repairs at Libby Dam were complete early and discharge was increased back up to 25,200 cfs at 10 a.m. this morning. This flow will be held until the end of the month or the start of refill, which every starts first.
The water supply forecast for April-to-August Libby inflow volume was 6.868 million-acre-feet, which is 117 percent of normal. It was issued April 4th. This forecast was an increase of almost 1.4 million-acre-feet, and it set the end of April flood risk management required elevation to 2,377.2 feet. However, there are no plans in April to spill at Libby Dam so this elevation will likely not be reached. The current modeling has Lake Koocanusa reaching its minimum elevation for the year near about 2,384 feet in early May. This elevation will depend on inflows in April and the start of refill date.
Results from this modeling can be found here:
The Libby Dam and Albeni Falls Dam Traces will be updated weekly from now through the summer.
The Northwest River Forecast Center creates daily forecasts for short term projections throughout the Kootenai and Columbia River Basins. These forecasts can be updated multiple times in a day and can be updated at anytime as conditions change. Links to those projections can be found below:
Short term forecasts for Libby Dam elevations and inflows can be found here: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=LYDM8
Short term forecasts for Libby Dam releases can be found here: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=KBDM8
Short term forecasts for Bonners Ferry can be found here: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=BFEI1
Please note the National Weather Service's disclaimer on forecasts after 3 days. All forecasts and model projections are based on the best information at the current time, as the weather changes so will the short and long-term predictions.
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