Mississippi River below Lock and Dam 8 - Genoa
Critical Stages
625.2' - Action
631' - Flood
634' - Moderate
636' - Major
Latest Observation
Updated: 10:15 PM CST 12/14/25
Status: No Flooding
Stage: 621.44 ft
Flow: 22.1 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10:15 PM 12/14 | 621.44 | 22.1 |
| 10:00 PM 12/14 | 621.44 | 22.1 |
| 9:45 PM 12/14 | 621.44 | 22.1 |
| 9:30 PM 12/14 | 621.43 | 22 |
| 9:15 PM 12/14 | 621.44 | 22.1 |
| 9:00 PM 12/14 | 621.43 | 22 |
| 8:45 PM 12/14 | 621.43 | 22 |
| 8:30 PM 12/14 | 621.43 | 22 |
| 8:15 PM 12/14 | 621.43 | 22 |
| 8:00 PM 12/14 | 621.43 | 22 |
| 7:45 PM 12/14 | 621.42 | 21.9 |
| 7:30 PM 12/14 | 621.43 | 22 |
| 7:15 PM 12/14 | 621.42 | 21.9 |
| 7:00 PM 12/14 | 621.43 | 22 |
| 6:45 PM 12/14 | 621.43 | 22 |
| 6:30 PM 12/14 | 621.43 | 22 |
| 6:15 PM 12/14 | 621.44 | 22.1 |
| 6:00 PM 12/14 | 621.43 | 22 |
| 5:45 PM 12/14 | 621.43 | 22 |
| 5:30 PM 12/14 | 621.42 | 21.9 |
| 5:15 PM 12/14 | 621.43 | 22 |
| 5:00 PM 12/14 | 621.43 | 22 |
| 4:45 PM 12/14 | 621.42 | 21.9 |
| 4:30 PM 12/14 | 621.42 | 21.9 |
| 4:15 PM 12/14 | 621.42 | 21.9 |
| 4:00 PM 12/14 | 621.42 | 21.9 |
| 3:45 PM 12/14 | 621.42 | 21.9 |
| 3:30 PM 12/14 | 621.42 | 21.9 |
| 3:15 PM 12/14 | 621.42 | 21.9 |
| 3:00 PM 12/14 | 621.42 | 21.9 |
639.5' -
Water begins to go over the protective earthen dikes.
639' -
Water begins to flow over the lock walls at Dam 8.
638.4' -
Water levels reach the flood of record.
636' -
Lock and dam 8 is closed to navigation.
631.5' -
Blackhawk Park south of Genoa is flooded.
625.2' -
Army Road likely closes near Albin, Iowa impacting the public access.
| Date | Stage (ft) |
|---|---|
| Apr 22, 1965 | 638.4 |
| Apr 12, 1997 | 636.45 |
| Apr 18, 2001 | 636.21 |
| Apr 27, 2023 | 635.72 |
| Apr 20, 1969 | 635.24 |
| Apr 20, 1952 | 634.52 |
| Jul 5, 2024 | 634.2 |
| Jun 26, 1993 | 633.94 |
| Apr 20, 1951 | 633.9 |
| May 3, 1975 | 633.86 |
| Apr 4, 2019 | 633.84 |
| Apr 16, 2011 | 633.5 |
| Apr 7, 1967 | 633.35 |
| Apr 9, 1986 | 633.1 |
| May 9, 1954 | 632.7 |
| Sep 28, 2010 | 632.4 |
| Mar 21, 1973 | 632.05 |
| May 25, 2019 | 631.97 |
| Apr 26, 1996 | 631.96 |
| Mar 14, 1983 | 631.82 |
Data provided by the National Weather Service.