Big River at Irondale, MO

USGS Site No: 07017200 • Big River • Washington County, MO

Big River at Irondale, MO on the Big River is currently at 42 cfs (Normal — 68th percentile for this date) . Gage height: 0.85 ft.

Reading from

Downstream on Big River ↓
Big River Below Desloge, MO
42
CFS Discharge
0.85
Gage Height (ft)
Normal
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 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 11
25th Low threshold 14
50th (Median) Normal (median) 21
75th High threshold 50 Today: 42 cfs
95th Very High threshold 398

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.

3.6k 1.8k 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 44 —
May 27, 2026 49 —
May 26, 2026 44 —
May 25, 2026 46 —
May 24, 2026 49 —
May 23, 2026 51 —
May 22, 2026 52 —
May 21, 2026 59 —
May 20, 2026 69 —
May 19, 2026 81 —
May 18, 2026 49 —
May 17, 2026 52 —
May 16, 2026 56 —
May 15, 2026 60 —
Apr 20, 2026 398 —
Apr 19, 2026 622 —
Apr 18, 2026 1,230 —
Apr 17, 2026 436 —
Apr 16, 2026 322 —
Apr 15, 2026 82 —
Apr 14, 2026 81 —
Apr 13, 2026 86 —
Apr 12, 2026 92 —
Apr 11, 2026 98 —
Apr 10, 2026 104 —
Apr 9, 2026 113 —
Apr 8, 2026 125 —
Apr 7, 2026 140 —
Apr 6, 2026 167 —
Apr 5, 2026 234 —

Station Information

USGS Site No
07017200
State
MO
County
Washington County
Coordinates
37.8300, -90.6909
Drainage Area
175 mi²
Datum (ft)
753.3
HUC Code
07140104
View on USGS NWIS →

Recent Extremes

Max discharge
8,650 cfs
Mar 5, 2026
Min discharge
8 cfs
Sep 19, 2025

Computed from the local daily-values archive.

Nearby Gauges

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