USGS Streamgage 14208000
Clackamas River at Big Bottom, OR
Clackamas River at Big Bottom, OR is USGS streamgage 14208000 in Oregon, monitoring river discharge in hydrologic subbasin 17090011. It sits on the Clackamas River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 136 square miles. Discharge records at this site go back to 1920. Typical flow runs near 287.5 cfs in July and 579.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Oregon
- Drainage area
- 136 sq mi
- Subbasin (HUC-8)
- 17090011
- Coordinates
- 45.01708, -121.92353
- USGS site number
- 14208000
- Records begin
- 1920-04-01 (106 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 51 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 | 288.5 | 444.1 | 1,094.8 | |
| February | 308.2 | 472.6 | 1,029.8 | |
| March | 333.7 | 454.5 | 806.2 | |
| April | 386.1 | 579.7 | 936.7 | |
| May | 360 | 680.3 | 1,050.4 | |
| June | 265.6 | 451.3 | 804 | |
| July | 227.9 | 287.5 | 388.1 | |
| August | 214.3 | 259.6 | 303.7 | |
| September | 212.3 | 252.8 | 300.2 | |
| October | 211.8 | 263.3 | 405.1 | |
| November | 238.2 | 345.7 | 870.5 | |
| December | 274.7 | 451.3 | 1,052 |
All values in cubic feet per second (cfs).
Common questions
- When does Clackamas River at Big Bottom, OR normally run highest?
- May, on the long-term record. The median daily flow that month is about 680.3 cfs, against 252.8 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 Clackamas River at Big Bottom, OR?
- It depends on the month. In January, half of days historically fall near 444.1 cfs, with the middle 80% of days between 288.5 and 1,094.8 cfs. The month-by-month table on this page gives the full range.
- How long has Clackamas River at Big Bottom, OR been measured?
- Discharge records at USGS site 14208000 begin in 1920, about 106 years, covering roughly 740 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Clackamas River at Big Bottom, OR?
- The gauge sits at 45.01708, -121.92353, in Oregon, in hydrologic subbasin 17090011, draining roughly 136 square miles.
- Can I use Clackamas River at Big Bottom, 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 Clackamas River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Clackamas River in full.
- Clackamas River at Big Bottom, OR this page
- Clackamas River above Three Lynx Creek, OR 479 sq mi
- Clackamas River at Carter Bridge, near Estacada, OR 594 sq mi
- Clackamas River at Estacada, OR 671 sq mi
- Clackamas River near Oregon City, OR 940 sq mi
Other gauges in this subbasin
- Collawash River near Breitenbush, OR
- Oak Grove Fork near Government Camp, OR
- Oak Grove Fork above Powerplant Intake, OR
- Oak Grove Fork at Ripplebrook Campground, OR
- Clackamas River above Three Lynx Creek, OR
- Fish Creek near Three Lynx, OR
- Clackamas River at Carter Bridge, near Estacada, OR
- Clackamas River at Estacada, OR