Columbia River at Rock Island Dam (outflow), WA

CHELAN COUNTY, WA47.3398°N, -120.0945°W Updated 17 hr ago

FLOW RATE

46,000cfs

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

46,000cfs

Optimal band: 43,325–58,617 cfs

PERIOD HIGH

106,975cfs

PERIOD LOW

36,521cfs

RUNNABLE

55%

last 1 year in band

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47.3398, -120.0945

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DATA · USACE · NOAA · NWSUPDATED 2026-09-23 00:00 UTC

Site #nwdp:RIS.Flow-Out.Ave.1Hour.1Hour.CBT-REV·USACE

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