USGS Streamgage 06630000
N Platte River Ab Seminoe Reservoir, near Sinclair, WY
N Platte River Ab Seminoe Reservoir, near Sinclair, WY is USGS streamgage 06630000 in Wyoming, monitoring river discharge in hydrologic subbasin 10180002. It drains a watershed of about 4,184 square miles. Discharge records at this site go back to 1939. Typical flow runs near 964.1 cfs in July and 1,224.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Wyoming
- Drainage area
- 4,184 sq mi
- Gauge elevation
- 6,409 ft
- Subbasin (HUC-8)
- 10180002
- Coordinates
- 41.87217, -107.0576
- USGS site number
- 06630000
- Records begin
- 1939-07-01 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 87 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 | 216.5 | 328.1 | 452.2 | |
| February | 239.7 | 351.8 | 490.8 | |
| March | 322.7 | 503.9 | 950.7 | |
| April | 634.2 | 1,224.4 | 2,451.3 | |
| May | 1,245.3 | 2,817.4 | 5,706.1 | |
| June | 1,237.5 | 3,841.7 | 7,928.7 | |
| July | 318.9 | 964.1 | 2,834.2 | |
| August | 174.5 | 396.3 | 876.1 | |
| September | 119.1 | 250.1 | 536.8 | |
| October | 208.7 | 366.8 | 697.5 | |
| November | 255.4 | 399.8 | 655.8 | |
| December | 232.8 | 344.7 | 489.2 |
All values in cubic feet per second (cfs).