Iowa River Below Coralville Dam near Coralville, IA
USGS Site No: 05453520 • Iowa River • Johnson County, IA
Iowa River Below Coralville Dam near Coralville, IA on the Iowa River is currently at 2,390 cfs (Normal — 57th percentile for this date) . Gage height: 51.01 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for July 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 | 474 | |
| 25th | Low threshold | 1,090 | |
| 50th (Median) | Normal (median) | 1,610 | |
| 75th | High threshold | 4,350 | Today: 2,390 cfs |
| 95th | Very High threshold | 14,400 |
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.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 2,620 | — |
| May 27, 2026 | 2,780 | — |
| May 26, 2026 | 2,960 | — |
| May 25, 2026 | 3,570 | — |
| May 24, 2026 | 4,040 | — |
| May 23, 2026 | 3,970 | — |
| May 22, 2026 | 3,730 | — |
| May 21, 2026 | 3,410 | — |
| May 20, 2026 | 3,140 | — |
| May 19, 2026 | 2,850 | — |
| May 18, 2026 | 2,150 | — |
| May 17, 2026 | 1,910 | — |
| May 16, 2026 | 1,780 | — |
| May 15, 2026 | 1,870 | — |
| Apr 20, 2026 | 8,250 | — |
| Apr 19, 2026 | 8,290 | — |
| Apr 18, 2026 | 8,320 | — |
| Apr 17, 2026 | 8,650 | — |
| Apr 16, 2026 | 9,260 | — |
| Apr 15, 2026 | 9,340 | — |
| Apr 14, 2026 | 9,180 | — |
| Apr 13, 2026 | 8,820 | — |
| Apr 12, 2026 | 8,200 | — |
| Apr 11, 2026 | 8,180 | — |
| Apr 10, 2026 | 7,850 | — |
| Apr 9, 2026 | 6,920 | — |
| Apr 8, 2026 | 6,380 | — |
| Apr 7, 2026 | 6,030 | — |
| Apr 6, 2026 | 5,390 | — |
| Apr 5, 2026 | 3,630 | — |
Station Information
- USGS Site No
- 05453520
- State
- IA
- County
- Johnson County
- Coordinates
- 41.7153, -91.5302
- Drainage Area
- 3,115 mi²
- Datum (ft)
- 599.7
- HUC Code
- 07080208
Recent Extremes
- Max discharge
-
10,300 cfsAug 4, 2025
- Min discharge
-
167 cfsJan 24, 2026
Computed from the local daily-values archive.
Nearby Gauges
-
Muddy Creek at Coralville, IANormal2.0 mi · 4 cfs
-
Rapid Creek Near Iowa City, IANormal2.4 mi · 7 cfs
-
Iowa River at Iowa City, IANormal4.1 mi · 2,420 cfs
-
Clear Creek Near Coralville, IANormal4.4 mi · 36 cfs
-
South Branch Ralston Creek at Iowa City, IANormal4.6 mi · 0 cfs