Rivermatics

USGS Streamgage 14185000

South Santiam River below Cascadia, OR

South Santiam River below Cascadia, OR is USGS streamgage 14185000 in Oregon, monitoring river discharge in hydrologic subbasin 17090006. It sits on the South Santiam River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 174 square miles. Discharge records at this site go back to 1935. Typical flow runs near 135.3 cfs in July and 1,027.2 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Oregon
Drainage area
174 sq mi
Subbasin (HUC-8)
17090006
Coordinates
44.39179, -122.49758
USGS site number
14185000
Records begin
1935-09-01 (91 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for South Santiam River below Cascadia, OR. 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
37.8 39.6 41.2
36.3 38.7 41.5
39.2 46.3 64.1
39.4 48.1 69.7
36.9 44 60
34.7 40.5 51.5
33.2 38.4 47.4
31.7 36.7 44.8
30.7 35.8 44
29.9 35 42.8
29.2 34.2 41.4
28.5 33.5 40.3
27.5 32.5 39.2
26.8 32 38.9

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

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 91 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 356.6 975.4 3,121
February 403.1 900.8 2,716.6
March 460.8 956.8 2,282.6
April 522.1 1,027.2 1,915.7
May 343.6 778 1,634.2
June 153.9 374 1,039.8
July 69.9 135.3 249.5
August 42 65.1 111.2
September 38.4 56.7 171.4
October 42.3 117.3 667.5
November 130.1 647.1 2,354.3
December 299.5 966.2 3,455.2

All values in cubic feet per second (cfs).

Common questions

When does South Santiam River below Cascadia, OR normally run highest?
April, on the long-term record. The median daily flow that month is about 1,027.2 cfs, against 56.7 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for South Santiam River below Cascadia, OR?
It depends on the month. In January, half of days historically fall near 975.4 cfs, with the middle 80% of days between 356.6 and 3,121 cfs. The month-by-month table on this page gives the full range.
How long has South Santiam River below Cascadia, OR been measured?
Discharge records at USGS site 14185000 begin in 1935, about 91 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for South Santiam River below Cascadia, OR?
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. A companion model forecasts each day's water-temperature high and low. 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 South Santiam River below Cascadia, OR?
The gauge sits at 44.39179, -122.49758, in Oregon, in hydrologic subbasin 17090006, draining roughly 174 square miles.
Can I use South Santiam River below Cascadia, OR 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 South Santiam River

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

Other gauges in this subbasin