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Birch HUC8 17040216

A 1,574 km² sub-basin of the Pacific Northwest region in ID, MT. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.

Health score
60
Moderate
Drought index
161
Moderate
Area in D2+
18.39%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
143
2 springs · 95 wells

USGS gauges (1)

Recent conditions

DateDSCID2+ %Gauges lowFlow pct
2026-10-2016118.39——
2026-10-1916118.39——
2026-10-1816118.39——
2026-10-1716118.39——
2026-10-1616118.39——
2026-10-1522039.75——
2026-10-1422039.75——
2026-10-1322039.75——
2026-10-1222039.75——
2026-10-1122039.75——
2026-10-1022039.75——
2026-10-0922039.75——
2026-10-0822239.75——
2026-10-0722239.75——

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