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 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
37
Stressed
Drought index
347
Extreme
Area in D2+
100%
0% exceptional (D4)
Gauges below normal
80%
of 5 reporting
Median flow
65%
p9 of record
Water assets
1,489
55 springs · 980 wells
USGS gauges (9)
- PORTNEUF RIVER NR TYHEE ID13075910269 cfsp8 · much below normal
- MARSH CREEK NR MCCAMMON ID1307500035 cfsp8 · much below normal
- SPRING CREEK AT SHEEPSKIN RD NR FORT HALL ID13075983226 cfsp9 · much below normal
- PORTNEUF RIVER AT TOPAZ ID1307300084 cfsp12 · below normal
- PORTNEUF RIVER AT POCATELLO ID13075500137 cfsp27 · normal
- Portneuf R. abv Toponce Rd, nr Chesterfield, Id130710102 cfsno long-term record
- PORTNEUF RIVER AT PEBBLE ID1307240038 cfsno long-term record
- Portneuf R. at Inkom, ID13074400140 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 |
|---|---|---|---|---|
| 2026-10-21 | 347 | 100 | 4/5 | p9 |
| 2026-10-20 | 347 | 100 | 5/5 | p8 |
| 2026-10-19 | 347 | 100 | 5/5 | p9 |
| 2026-10-18 | 347 | 100 | 4/5 | p8 |
| 2026-10-17 | 347 | 100 | 5/5 | p8 |
| 2026-10-16 | 347 | 100 | 4/5 | p9 |
| 2026-10-15 | 394 | 100 | 4/5 | p10 |
| 2026-10-14 | 394 | 100 | 4/5 | p13 |
| 2026-10-13 | 394 | 100 | 3/4 | p16 |
| 2026-10-12 | 394 | 100 | 3/4 | p21 |
| 2026-10-11 | 394 | 100 | 3/4 | p10 |
| 2026-10-10 | 394 | 100 | 3/4 | p9 |
| 2026-10-09 | 394 | 100 | 4/4 | p9 |
| 2026-10-08 | 394 | 100 | 4/4 | p10 |
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