USGS Streamgage 12438000
Columbia River at Bridgeport, WA
Columbia River at Bridgeport, WA is USGS streamgage 12438000 in Washington, monitoring river discharge in hydrologic subbasin 17020005. It drains a watershed of about 75,700 square miles. Discharge records at this site go back to 1952. Typical flow runs near 132,967.7 cfs in July and 98,850 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Drainage area
- 75,700 sq mi
- Gauge elevation
- 795 ft
- Subbasin (HUC-8)
- 17020005
- Coordinates
- 48.00653, -119.66533
- USGS site number
- 12438000
- Records begin
- 1952-04-01 (74 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 74 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 | 58,403.2 | 96,271 | 143,032.3 | |
| February | 61,075.9 | 93,627.6 | 144,241.4 | |
| March | 56,248.4 | 88,680.6 | 143,354.8 | |
| April | 58,106.7 | 98,850 | 161,566.7 | |
| May | 80,771 | 136,516.1 | 223,193.5 | |
| June | 85,986.7 | 155,233.3 | 321,433.3 | |
| July | 78,677.4 | 132,967.7 | 233,741.9 | |
| August | 72,945.2 | 103,032.3 | 144,000 | |
| September | 50,210 | 70,933.3 | 97,543.3 | |
| October | 49,909.7 | 69,019.4 | 94,564.5 | |
| November | 55,650 | 81,863.3 | 106,520 | |
| December | 55,583.9 | 90,077.4 | 128,709.7 |
All values in cubic feet per second (cfs).