Flow and Spill Query for Snake and Columbia River Sites

Important Notes:

  • As finalized data for the previous month is not received until the 7th of the following month, we do not have finalized flow data for the past month until then. We have no current finalized flow data.
  • Before this time you may view the previous month's preliminary daily data in either the last two week report.
  • Click here for a brief metadata listing of the fields included in this query.
Flow, Spill, and Elevation Data
Step 1. Choose one of the following Projects: See map of sites
Step 2. Enter desired date range in mm/dd/yyyy format: to
Start date for hourly and daily flows varies by site - see below.
Other Notes:
  • When selecting hourly data it is suggested that you don't choose more than one year's worth of data as the number of records returned may lock up your browser.
  • These data match what the USACE CROHMS system provided FPC at the time. While this is finalized flow data provided by the Army Corps of Engineers, it is not without errors. We usually receive data on the 7th of each month at which time our database is updated through the end of the previous month. Provisional data for the last two weeks is available at: http://www.fpc.org/CurrentDaily/flowspil.txt.
Step 3. Select Hourly Flow or Daily Average Hourly Flow
(midnight to midnight):

Step 4. Submit Form or Reset


Data Available

Site Hourly Flow Daily Flow
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: March 26, 2013

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