USGS Streamgage 06043500
Gallatin River near Gallatin Gateway, MT
Gallatin River near Gallatin Gateway, MT is USGS streamgage 06043500 in Montana, monitoring river discharge in hydrologic subbasin 10020008. It drains a watershed of about 819 square miles. Discharge records at this site go back to 1889. Typical flow runs near 1,153 cfs in July and 453.9 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 819 sq mi
- Gauge elevation
- 5,174 ft
- Subbasin (HUC-8)
- 10020008
- Coordinates
- 45.4973, -111.27071
- USGS site number
- 06043500
- Records begin
- 1889-08-01 (137 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 137 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 | 236.9 | 296.4 | 386.5 | |
| February | 238.4 | 291.9 | 371.6 | |
| March | 243.8 | 299.2 | 392.5 | |
| April | 305.5 | 453.9 | 781.9 | |
| May | 891.3 | 1,646.9 | 3,121.9 | |
| June | 1,508.9 | 2,742.3 | 4,662 | |
| July | 655.8 | 1,153 | 2,036.8 | |
| August | 418.7 | 569.9 | 838.1 | |
| September | 359.2 | 463.4 | 643.9 | |
| October | 332.4 | 429.9 | 597.8 | |
| November | 279.7 | 368.8 | 495.6 | |
| December | 237.7 | 307 | 407 |
All values in cubic feet per second (cfs).