USGS Streamgage 06485500
Big Sioux River at Akron, IA
Big Sioux River at Akron, IA is USGS streamgage 06485500, monitoring river discharge in hydrologic subbasin 10170203. It drains a watershed of about 7,879 square miles. Discharge records at this site go back to 1928. Typical flow runs near 909.8 cfs in July and 1,448 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 7,879 sq mi
- Gauge elevation
- 1,125 ft
- Subbasin (HUC-8)
- 10170203
- Coordinates
- 42.83751, -96.56193
- USGS site number
- 06485500
- Records begin
- 1928-10-01 (98 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 98 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 | 41.4 | 149.8 | 843.1 | |
| February | 52.3 | 273.4 | 1,660.8 | |
| March | 199.5 | 1,315.4 | 6,681.3 | |
| April | 373.3 | 1,448 | 10,024.3 | |
| May | 290 | 1,317.7 | 6,038.1 | |
| June | 237.8 | 1,417.7 | 7,021.7 | |
| July | 154.5 | 909.8 | 4,104.5 | |
| August | 99 | 525.1 | 2,314.2 | |
| September | 81.6 | 395.6 | 1,852.7 | |
| October | 79.5 | 318 | 2,368.4 | |
| November | 85.5 | 305.3 | 1,904.7 | |
| December | 65.3 | 217.4 | 1,490.6 |
All values in cubic feet per second (cfs).