USGS Streamgage 14187500
South Santiam River at Waterloo, OR
South Santiam River at Waterloo, OR is USGS streamgage 14187500 in Oregon, monitoring river discharge in hydrologic subbasin 17090006. It drains a watershed of about 640 square miles. Discharge records at this site go back to 1905. Typical flow runs near 728.5 cfs in July and 3,193 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 640 sq mi
- Subbasin (HUC-8)
- 17090006
- Coordinates
- 44.49846, -122.82342
- USGS site number
- 14187500
- Records begin
- 1905-07-01 (121 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 121 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 1,530.6 | 4,307.7 | 11,296.8 | |
| February | 1,126.9 | 2,953.8 | 9,434.1 | |
| March | 1,209.7 | 2,873.5 | 7,742.6 | |
| April | 1,299.3 | 3,193 | 6,262 | |
| May | 962.6 | 2,323.2 | 4,990.3 | |
| June | 664.7 | 1,320.1 | 3,301 | |
| July | 347.7 | 728.5 | 1,067.6 | |
| August | 185.9 | 599.2 | 964.8 | |
| September | 156.4 | 850.7 | 1,690.7 | |
| October | 202.3 | 1,317.2 | 3,211 | |
| November | 725 | 3,121 | 8,906.7 | |
| December | 1,401.9 | 4,337.1 | 11,922.6 |
All values in cubic feet per second (cfs).