Portneuf HUC8 17040208
A 4,344 km² sub-basin of the Pacific Northwest region in ID. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
35
Stressed
Drought index
394
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
80%
of 5 reporting
Median flow
68%
p16 of record
Water assets
1,489
55 springs · 980 wells
USGS gauges (9)
- SPRING CREEK AT SHEEPSKIN RD NR FORT HALL ID13075983209 cfsp9 · much below normal
- PORTNEUF RIVER AT TOPAZ ID1307300072 cfsp9 · much below normal
- MARSH CREEK NR MCCAMMON ID1307500036 cfsp16 · below normal
- PORTNEUF RIVER AT POCATELLO ID1307550047 cfsp18 · below normal
- PORTNEUF RIVER NR TYHEE ID13075910445 cfsp84 · above normal
- Portneuf R. abv Toponce Rd, nr Chesterfield, Id130710100 cfsno long-term record
- PORTNEUF RIVER AT PEBBLE ID1307240024 cfsno long-term record
- Portneuf R. at Inkom, ID1307440047 cfsno long-term record
- MARSH CREEK AB HAWKINS CREEK NR VIRGINIA ID13074810no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 394 | 100 | 4/5 | p16 |
Top water assets
- 69Hawkins Creekriver
- 69Middle Fork Toponce Creekriver
- 69Portneuf Riverriver
- 69Jeff Cabin Creekriver
- 69Portneuf Riverriver
- 69King Creekriver
- 69Portneuf River At Pebble Idriver
- 69Ross Forkriver
- 69Portneuf R. Abv Toponce Rd, Nr Chesterfield, Idriver
- 69Portneuf Riverriver