South Santiam River at Waterloo, OR
Willamette Valley & Cascades · USGS gauge 14187500 · Updated Oct 24, 3:19 AM PDT · USGS data, provisional
Reading time: Oct 24, 3:10 AM PDT · Provisional data
Flow is in a typical range for the date. Rivers are generally easiest to fish and float when they are near their normal flow, but this status says nothing about water clarity, hatches, hazards such as wood in the river, or dam releases.
- Vs. normal for this date
- 40th percentile
- Typical range (25th–75th)
- 722–2,462 cfs
- Median for this date
- 1,425 cfs
- 7-day low / high
- 1,110 / 1,350 cfs
Plain-language explanation
South Santiam River at Waterloo is flowing at 1,180 cubic feet per second (cfs) as of Oct 24, 3:10 AM PDT. That is in the normal range for this time of year: lower than about 60% of the daily flows this gauge has recorded for this date (give or take 7 days) over 107 years of record (1905–2026).
The middle half of those historical flows runs from 722 to 2,462 cfs, with a median of 1,425 cfs; the lowest 10% of days are at or below 222 cfs and the highest 10% at or above 3,860 cfs.
Over the last 24 hours the flow has been steady (+6.3%). In the last 7 days it ranged from 1,110 to 1,350 cfs.
Regulated flow: upstream dams or diversions influence this gauge, so the “normal range” above reflects managed flows and can differ from natural river behavior.
Why this status: Flow is within the range this gauge normally sees at this time of year (or the deviation is too small in absolute terms to matter).
7-day trend
Hourly flow in cfs, Pacific time. The shaded band is the typical range (25th–75th percentile) for this date, shown when it falls within the chart.
| Day (Pacific) | Mean cfs | Percentile | Status that day |
|---|---|---|---|
| Sun Oct 18 | 1,150 | 44th | Fishable/Floatable |
| Mon Oct 19 | 1,152 | 43rd | Fishable/Floatable |
| Tue Oct 20 | 1,151 | 43rd | Fishable/Floatable |
| Wed Oct 21 | 1,150 | 42nd | Fishable/Floatable |
| Thu Oct 22 | 1,171 | 42nd | Fishable/Floatable |
| Fri Oct 23 | 1,158 | 41st | Fishable/Floatable |
| Sat Oct 24 (so far) | 1,176 | 40th | Fishable/Floatable |
Seasonal context
Shaded band: 10th–90th percentile of daily flows through the year; dashed line: median. Log scale. Dot: today's flow. Based on 107 years of USGS daily data (1905–2026).
About this gauge
- USGS site
- USGS-14187500
- USGS name
- South Santiam River At Waterloo, Or
- Drainage area
- 640 sq mi
- Location
- 44.4985, -122.8234
- Record in this analysis
- 1905–2026
Typical uses
Notes: Flows are partly regulated by upstream dams. (Hand-written general note, not from USGS data.)
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