Rivermatics

USGS Streamgage 13071010

Portneuf River. above Toponce Rd, near Chesterfield, ID

Portneuf River. above Toponce Rd, near Chesterfield, ID is USGS streamgage 13071010 in Idaho, monitoring river discharge in hydrologic subbasin 17040208. It sits on the Portneuf River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 92 square miles. Discharge records at this site go back to 2024. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Idaho
Drainage area
92 sq mi
Subbasin (HUC-8)
17040208
Coordinates
42.86975, -111.93421
USGS site number
13071010
Records begin
2024-04-04 (2 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Portneuf River. above Toponce Rd, near Chesterfield, ID. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
0 0.2 0.4
0 0.1 0.4
0 0.1 0.5
0 0.2 0.5
0 0.2 0.6
0 0.2 0.8
0 0.2 0.9
0 0.2 1
0 0.2 1.2
0 0.2 1.5
0 0.2 2
0 0.1 2.6
0 0.1 3.2
0 0.2 4

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Common questions

How long has Portneuf River. above Toponce Rd, near Chesterfield, ID been measured?
Discharge records at USGS site 13071010 begin in 2024, about 2 years, covering roughly 795 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Portneuf River. above Toponce Rd, near Chesterfield, ID?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Portneuf River. above Toponce Rd, near Chesterfield, ID?
The gauge sits at 42.86975, -111.93421, in Idaho, in hydrologic subbasin 17040208, draining roughly 92 square miles.
Can I use Portneuf River. above Toponce Rd, near Chesterfield, ID data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Portneuf River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Portneuf River in full.

Other gauges in this subbasin