Big Spring Creek at River&b Trading Post near Lewistown Mount

USGS Site No: 06111800 • Big Spring Creek • Fergus County, MT

Big Spring Creek at River&b Trading Post near Lewistown Mount on the Big Spring Creek is currently at 139 cfs (Very Low — 10th percentile for this date) . Gage height: 3.64 ft.

Reading from

139
CFS Discharge
3.64
Gage Height (ft)
Very Low
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 29 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile Label CFS Threshold Today's Flow
10th Very Low threshold 141 Today: 139 cfs
25th Low threshold 151
50th (Median) Normal (median) 165
75th High threshold 173
95th Very High threshold 0

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

273 137 0 cfs Apr 5 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 139 —
May 27, 2026 141 —
May 26, 2026 144 —
May 25, 2026 155 —
May 24, 2026 170 —
May 23, 2026 174 —
May 22, 2026 180 —
May 21, 2026 184 —
May 20, 2026 180 —
May 19, 2026 180 —
May 18, 2026 180 —
May 17, 2026 177 —
May 16, 2026 164 —
May 15, 2026 159 —
Apr 20, 2026 167 —
Apr 19, 2026 168 —
Apr 18, 2026 171 —
Apr 17, 2026 172 —
Apr 16, 2026 176 —
Apr 15, 2026 169 —
Apr 14, 2026 170 —
Apr 13, 2026 172 —
Apr 12, 2026 171 —
Apr 11, 2026 170 —
Apr 10, 2026 170 —
Apr 9, 2026 171 —
Apr 8, 2026 172 —
Apr 7, 2026 174 —
Apr 6, 2026 178 —
Apr 5, 2026 183 —

Station Information

USGS Site No
06111800
State
MT
County
Fergus County
Coordinates
47.0878, -109.4575
Drainage Area
191 mi²
Datum (ft)
3,843.0
HUC Code
10040103
View on USGS NWIS →

Recent Extremes

Max discharge
319 cfs
Mar 19, 2026
Min discharge
127 cfs
Jul 14, 2025

Computed from the local daily-values archive.

Nearby Gauges

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