Rivermatics

USGS Streamgage 14187200

South Santiam River near Foster, OR

South Santiam River near Foster, OR is USGS streamgage 14187200 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 557 square miles. Discharge records at this site go back to 1973. Typical flow runs near 827.1 cfs in July and 2,727.7 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
557 sq mi
Subbasin (HUC-8)
17090006
Coordinates
44.41235, -122.6887
USGS site number
14187200
Records begin
1973-07-19 (53 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for South Santiam River near Foster, 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
1,533 1,577 1,645
1,509 1,571 1,655
1,486 1,582 1,759
1,475 1,584 1,723
1,445 1,580 1,758
1,412 1,576 1,788
1,391 1,584 1,848
1,381 1,591 1,876
1,356 1,594 1,897
1,337 1,584 1,869
1,324 1,583 1,884
1,326 1,587 1,894
1,317 1,587 1,908
1,297 1,584 1,928

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 52 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 1,483.8 4,666.5 10,867.4
February 886.4 1,897.9 7,192.1
March 946.6 2,099 6,880
April 1,145.5 2,727.7 5,866.3
May 897.3 2,045.5 4,515.2
June 765.1 1,262.3 3,259.7
July 660.2 827.1 1,081.7
August 615 777.9 970.5
September 781.3 1,247.3 1,766
October 882.2 1,702.6 3,138.1
November 1,085 3,427.3 8,291
December 1,506.8 5,155.8 11,874.2

All values in cubic feet per second (cfs).

Common questions

When does South Santiam River near Foster, OR normally run highest?
December, on the long-term record. The median daily flow that month is about 5,155.8 cfs, against 777.9 cfs in August, 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 near Foster, OR?
It depends on the month. In January, half of days historically fall near 4,666.5 cfs, with the middle 80% of days between 1,483.8 and 10,867.4 cfs. The month-by-month table on this page gives the full range.
How long has South Santiam River near Foster, OR been measured?
Discharge records at USGS site 14187200 begin in 1973, about 53 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 near Foster, 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 near Foster, OR?
The gauge sits at 44.41235, -122.6887, in Oregon, in hydrologic subbasin 17090006, draining roughly 557 square miles.
Can I use South Santiam River near Foster, 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