Flow and Spill Data




Spill Season Update




Hourly and Daily Average Flow (Daily average is midnight to midnight)

IMPORTANT NOTE: Finalized data is received on the 7th of each month for the Previous Month!. Finalized data available here in general lags one month behind the current date. Before this time you may view the previous month's preliminary daily data in either the last two week report or view archived versions of this file in the ftp flowspill archive.

Data Available

  Hourly Flow Daily Flow
Site Start Date Start Date
Bonneville Dam (BON) 1974-01-01 1964-01-01
Brownlee Dam (BRN)   1974-11-01
Chief Joseph Dam (CHJ) 2001-01-01 2001-01-01
Dworshak Dam (DWR) 1974-01-01 1974-01-01
Grand Coulee Dam (GCL) 1974-01-01 1974-01-01
Hells Canyon Dam (HCD)   1974-11-01
Hungry Horse Reservoir (HGH) 2002-01-01 2002-01-01
Ice Harbor Dam (IHR) 1974-01-01 1964-01-01
John Dam Dam (JDA) 1974-01-01 1968-04-22
Lower Granite Dam (LGR) 1975-04-01 1975-04-01
Little Goose Dam (LGS) 1974-01-01 1970-03-01
Libby Reservoir/Dam 1998-12-31 1998-12-31
Lower Monumental Dam (LMN) 1974-01-01 1969-04-01
McNary Dam (MCN) 1974-01-01 1964-01-01
Priest Rapids Dam (PRD) 1974-01-01 1974-01-01
Rock Island Dam (RIS) 1974-01-01 1974-01-01
Rocky Reach Dam (RRH) 1974-01-01 1974-01-01
The Dalles Dam (TDA) 1974-01-01 1964-01-01
Wanapum Dam (WAN) 1974-01-01 1974-01-01
Wells Dam (WEL) 1974-01-01 1974-01-01




Page last updated on: January 30, 2007

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