USGS Streamgage 06052500
Gallatin River at Logan, MT
Gallatin River at Logan, MT is USGS streamgage 06052500 in Montana, monitoring river discharge in hydrologic subbasin 10020008. It drains a watershed of about 1,789 square miles. Discharge records at this site go back to 1893. Typical flow runs near 821.7 cfs in July and 992.1 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 1,789 sq mi
- Gauge elevation
- 4,092 ft
- Subbasin (HUC-8)
- 10020008
- Coordinates
- 45.88625, -111.44201
- USGS site number
- 06052500
- Records begin
- 1893-10-01 (133 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 133 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 | 504.7 | 676.3 | 843.6 | |
| February | 509.7 | 670.6 | 869.1 | |
| March | 575.2 | 731.6 | 1,020.1 | |
| April | 636.5 | 992.1 | 1,509.7 | |
| May | 901.3 | 1,973.9 | 3,773.2 | |
| June | 1,033.3 | 2,805 | 5,298 | |
| July | 271.9 | 821.7 | 1,987.8 | |
| August | 255.9 | 421 | 740.4 | |
| September | 341.4 | 564.6 | 940.8 | |
| October | 503.4 | 711.1 | 1,062.6 | |
| November | 592.8 | 802.2 | 1,050.3 | |
| December | 564.8 | 725.7 | 919.5 |
All values in cubic feet per second (cfs).