Upper Willamette HUC8 17090003

A 4,849 km² sub-basin of the Pacific Northwest region in OR. 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

Stressed

Drought index

284

Severe

Area in D2+

81.68%

0% exceptional (D4)

Gauges below normal

78%

of 9 reporting

Median flow

64%

p16 of record

Water assets

1,932

30 springs · 1,661 wells

USGS gauges (10)

CALAPOOIA RIVER AT ALBANY, OR
1417350017 cfsp7 · much below normal
MARYS RIVER NEAR PHILOMATH, OR
1417100013 cfsp9 · much below normal
WILLAMETTE RIVER AT HARRISBURG, OR
141660003,710 cfsp10 · much below normal
WILLAMETTE RIVER AT CORVALLIS, OR
141716004,570 cfsp11 · below normal
LONG TOM RIVER NEAR NOTI, OR
1416650015 cfsp16 · below normal
LUCKIAMUTE RIVER NEAR SUVER, OR
1419050040 cfsp23 · below normal
LONG TOM RIVER NEAR ALVADORE, OR
14169000564 cfsp25 · below normal
WILLAMETTE RIVER AT ALBANY, OR
141740004,720 cfsp35 · normal
LONG TOM RIVER AT MONROE, OR
14170000578 cfsp43 · normal
LUCKIAMUTE RIVER NEAR BUENA VISTA, OR
1419061038 cfsno long-term record

Recent conditions

Date	DSCI	D2+ %	Gauges low	Flow pct
2026-10-20	284	81.68	7/9	p16
2026-10-19	284	81.68	7/9	p17
2026-10-18	284	81.68	6/9	p20
2026-10-17	284	81.68	5/9	p20
2026-10-16	284	81.68	6/9	p20
2026-10-15	284	81.68	5/9	p22
2026-10-14	284	81.68	4/9	p26
2026-10-13	284	81.68	4/8	p24
2026-10-12	284	81.68	5/8	p23
2026-10-11	284	81.68	4/8	p23
2026-10-10	284	81.68	5/8	p20
2026-10-09	284	81.68	6/9	p20
2026-10-08	284	81.68	6/9	p13
2026-10-07	284	81.68	6/9	p15

Top water assets

View on the map All Pacific Northwest sub-basins