Skagit River Instream Flows

skagitriver_lowflow.jpgFor each month of the year the Department of Ecology has established minimum Instream Flow Levels for the Skagit River.
The data is based on the height and flow of the Skagit utilizing the U.S. Geological Survey Gaging Station near Mount Vernon.

If we fall below prescribed levels, we have certain public notification processes that we must adhere to based on the 1996 Memorandum of Agreement signed by:

  • Skagit PUD
  • City of Anacortes
  • Skagit County
  • Upper Skagit Tribe
  • Sauk-Suiattle Tribe
  • Swinomish Tribe
  • Department of¬†Ecology
  • Department of Fish and Wildlife

The levels in the table below were established to maintain minimum water levels in the Skagit to protect fish habitat. The Skagit is the only river system in Washington that supports all five species of salmon. It provides about 30 percent of the fresh water flowing into Puget Sound.

Instream Flow Levels
MonthDayMinimum Flow (cfs)
January
1-31 10,000
February
1-29 10,000
March
1-31 10,000
April
1-30 12,000
May
1-31 12,000
June
1-30 12,000
July
1-31 10,000
August
1-31 10,000
September
1-30 10,000
October
1-31 13,000
November
1-15 13,000
November
16-30 11,000
December
1-15 11,000
December
16-31 10,000