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Hydrograph River at a Glance Download
Mississippi River at Herculaneum Stage (ft)Observed: 17.4 ft at 12:00PM Mar 27, 2023Observed: 17.44 ft at 12:30PM Mar 27, 2023Observed: 17.48 ft at 1:00PM Mar 27, 2023Observed: 17.51 ft at 1:30PM Mar 27, 2023Observed: 17.55 ft at 2:00PM Mar 27, 2023Observed: 17.56 ft at 2:30PM Mar 27, 2023Observed: 17.55 ft at 3:00PM Mar 27, 2023Observed: 17.6 ft at 3:30PM Mar 27, 2023Observed: 17.63 ft at 4:00PM Mar 27, 2023Observed: 17.69 ft at 4:30PM Mar 27, 2023Observed: 17.73 ft at 5:00PM Mar 27, 2023Observed: 17.71 ft at 5:30PM Mar 27, 2023Observed: 17.75 ft at 6:00PM Mar 27, 2023Observed: 17.76 ft at 6:30PM Mar 27, 2023Observed: 17.81 ft at 7:00PM Mar 27, 2023Observed: 17.85 ft at 7:30PM Mar 27, 2023Observed: 17.87 ft at 8:00PM Mar 27, 2023Observed: 17.88 ft at 8:30PM Mar 27, 2023Observed: 17.9 ft at 9:00PM Mar 27, 2023Observed: 17.93 ft at 9:30PM Mar 27, 2023Observed: 17.95 ft at 10:00PM Mar 27, 2023Observed: 17.96 ft at 10:30PM Mar 27, 2023Observed: 17.98 ft at 11:00PM Mar 27, 2023Observed: 17.99 ft at 11:30PM Mar 27, 2023Observed: 18.04 ft at 12:00AM Mar 28, 2023Observed: 18.06 ft at 12:30AM Mar 28, 2023Observed: 18.09 ft at 1:00AM Mar 28, 2023Observed: 18.13 ft at 1:30AM Mar 28, 2023Observed: 18.14 ft at 2:00AM Mar 28, 2023Observed: 18.17 ft at 2:30AM Mar 28, 2023Observed: 18.19 ft at 3:00AM Mar 28, 2023Observed: 18.21 ft at 3:30AM Mar 28, 2023Observed: 18.24 ft at 4:00AM Mar 28, 2023Observed: 18.24 ft at 4:30AM Mar 28, 2023Observed: 18.29 ft at 5:00AM Mar 28, 2023Observed: 18.31 ft at 5:30AM Mar 28, 2023Observed: 18.34 ft at 6:00AM Mar 28, 2023Observed: 18.36 ft at 6:30AM Mar 28, 2023Observed: 18.37 ft at 7:00AM Mar 28, 2023Observed: 18.42 ft at 7:30AM Mar 28, 2023Observed: 18.45 ft at 8:00AM Mar 28, 2023Observed: 18.47 ft at 8:30AM Mar 28, 2023Observed: 18.5 ft at 9:00AM Mar 28, 2023Observed: 18.53 ft at 9:30AM Mar 28, 2023Observed: 18.56 ft at 10:00AM Mar 28, 2023Observed: 18.63 ft at 10:30AM Mar 28, 2023Observed: 18.62 ft at 11:00AM Mar 28, 2023Observed: 18.67 ft at 11:30AM Mar 28, 2023Observed: 18.72 ft at 12:00PM Mar 28, 2023Observed: 18.75 ft at 12:30PM Mar 28, 2023Observed: 18.74 ft at 1:00PM Mar 28, 2023Observed: 18.8 ft at 1:30PM Mar 28, 2023Observed: 18.84 ft at 2:00PM Mar 28, 2023Observed: 18.86 ft at 2:30PM Mar 28, 2023Observed: 18.94 ft at 3:00PM Mar 28, 2023Observed: 18.92 ft at 3:30PM Mar 28, 2023Observed: 18.97 ft at 4:00PM Mar 28, 2023Observed: 18.99 ft at 4:30PM Mar 28, 2023Observed: 19.01 ft at 5:00PM Mar 28, 2023Observed: 19.08 ft at 5:30PM Mar 28, 2023Observed: 19.1 ft at 6:00PM Mar 28, 2023Observed: 19.12 ft at 6:30PM Mar 28, 2023Observed: 19.15 ft at 7:00PM Mar 28, 2023Observed: 19.21 ft at 7:30PM Mar 28, 2023Observed: 19.2 ft at 8:00PM Mar 28, 2023Observed: 19.24 ft at 8:30PM Mar 28, 2023Observed: 19.28 ft at 9:00PM Mar 28, 2023Observed: 19.31 ft at 9:30PM Mar 28, 2023Observed: 19.34 ft at 10:00PM Mar 28, 2023Observed: 19.38 ft at 10:30PM Mar 28, 2023Observed: 19.39 ft at 11:00PM Mar 28, 2023Observed: 19.44 ft at 11:30PM Mar 28, 2023Observed: 19.39 ft at 12:00AM Mar 29, 2023Observed: 19.45 ft at 12:30AM Mar 29, 2023Observed: 19.47 ft at 1:00AM Mar 29, 2023Observed: 19.48 ft at 1:30AM Mar 29, 2023Observed: 19.49 ft at 2:00AM Mar 29, 2023Observed: 19.52 ft at 2:30AM Mar 29, 2023Observed: 19.5 ft at 3:00AM Mar 29, 2023Observed: 19.52 ft at 3:30AM Mar 29, 2023Observed: 19.51 ft at 4:00AM Mar 29, 2023Observed: 19.54 ft at 4:30AM Mar 29, 2023Observed: 19.5 ft at 5:00AM Mar 29, 2023Highest Observation: 19.55 ft at 5:30AM Mar 29, 2023Observed: 19.53 ft at 6:00AM Mar 29, 2023Observed: 19.47 ft at 6:30AM Mar 29, 2023Observed: 19.52 ft at 7:00AM Mar 29, 2023Observed: 19.52 ft at 7:30AM Mar 29, 2023Observed: 19.47 ft at 8:30AM Mar 29, 2023Observed: 19.45 ft at 9:00AM Mar 29, 2023Observed: 19.41 ft at 9:30AM Mar 29, 2023Observed: 19.31 ft at 11:30AM Mar 29, 2023Observed: 19.3 ft at 12:00PM Mar 29, 2023Observed: 19.23 ft at 12:30PM Mar 29, 2023Observed: 19.24 ft at 1:00PM Mar 29, 2023Observed: 19.13 ft at 1:30PM Mar 29, 2023Observed: 19.14 ft at 2:00PM Mar 29, 2023Observed: 19.07 ft at 2:30PM Mar 29, 2023Observed: 19.02 ft at 3:00PM Mar 29, 2023Observed: 19.03 ft at 3:30PM Mar 29, 2023Observed: 18.99 ft at 4:00PM Mar 29, 2023Observed: 18.95 ft at 4:30PM Mar 29, 2023Observed: 18.88 ft at 5:00PM Mar 29, 2023Observed: 18.82 ft at 5:30PM Mar 29, 2023Observed: 18.8 ft at 6:00PM Mar 29, 2023Observed: 18.73 ft at 6:30PM Mar 29, 2023Observed: 18.68 ft at 7:00PM Mar 29, 2023Observed: 18.65 ft at 7:30PM Mar 29, 2023Observed: 18.6 ft at 8:00PM Mar 29, 2023Observed: 18.53 ft at 8:30PM Mar 29, 2023Observed: 18.51 ft at 9:00PM Mar 29, 2023Observed: 18.41 ft at 9:30PM Mar 29, 2023Observed: 18.38 ft at 10:00PM Mar 29, 2023Observed: 18.32 ft at 10:30PM Mar 29, 2023Observed: 18.28 ft at 11:00PM Mar 29, 2023Observed: 18.22 ft at 11:30PM Mar 29, 2023Observed: 18.21 ft at 12:00AM Mar 30, 2023Observed: 18.13 ft at 12:30AM Mar 30, 2023Observed: 18.11 ft at 1:00AM Mar 30, 2023Observed: 18.08 ft at 1:30AM Mar 30, 2023Observed: 18.02 ft at 2:00AM Mar 30, 2023Observed: 17.97 ft at 2:30AM Mar 30, 2023Observed: 17.94 ft at 3:00AM Mar 30, 2023Observed: 17.9 ft at 3:30AM Mar 30, 2023Observed: 17.85 ft at 4:00AM Mar 30, 2023Observed: 17.83 ft at 4:30AM Mar 30, 2023Observed: 17.78 ft at 5:00AM Mar 30, 2023Observed: 17.73 ft at 5:30AM Mar 30, 2023Observed: 17.66 ft at 6:00AM Mar 30, 2023Observed: 17.66 ft at 6:30AM Mar 30, 2023Observed: 17.61 ft at 7:00AM Mar 30, 2023Observed: 17.56 ft at 7:30AM Mar 30, 2023Observed: 17.46 ft at 8:00AM Mar 30, 2023Observed: 17.44 ft at 8:30AM Mar 30, 2023Observed: 17.4 ft at 9:00AM Mar 30, 2023Observed: 17.36 ft at 9:30AM Mar 30, 2023Observed: 17.26 ft at 10:00AM Mar 30, 2023Observed: 17.24 ft at 10:30AM Mar 30, 2023Observed: 17.23 ft at 11:00AM Mar 30, 2023USGS--Water Resources of the United StatesHRCM7(plotting HGIRG) Graph Created (11:56AM Mar 30, 2023)ObservedLatest observed value: 17.23 ft at 11:00 AM CDT 30-Mar-2023. Flood Stage is 26 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
NOTE: Forecasts are not available for the Mississippi River at Herculaneum. Only observed stages are available for this point.
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Upstream Gauge - at St. Louis Upstream Gauge Downstream Gauge Downstream Gauge - at Chester
Flood Categories (in feet)
Major Flood Stage: 37
Moderate Flood Stage: 32
Flood Stage: 26
Action Stage: 24
Low Stage (in feet): -9999

Historic Crests
(1) 27.41 ft on 06/29/2021

(P): Preliminary values subject to further review.

Recent Crests
(1) 27.41 ft on 06/29/2021

(P): Preliminary values subject to further review.

Low Water Records
(1) -4.96 ft on 01/28/2022
(2) -2.44 ft on 08/26/2021

For more information on your flood risk go to

Zoom Level:16
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
47 Near this height, the Herculaneum wastewater pumping station on Station Street begins flooding.
46 Near this height, the New South bridge will begin flooding on the bridge deck at the south end of the bridge.
44.5 Near this height, the New South bridge will begin flooding at the south approach to the bridge.
38.6 At this height, the railroad tracks at the Herculaneum riverfront will be inundated.
36.5 At this height, the ground adjacent to the office trailer at the Doe Run barge unloader will be inundated.
35.8 Near this height, all 3 of the ball fields at Kades Playground will be unplayable.
34.5 Near this height, two of the three ball fields at Kades Playground will be unplayable.
34.4 Near this height, the Barge Unloading Building of the Doe Run Company begins flooding.
30.8 Near this height, the biggest of the three ball fields at Kades Playground and the All Bark Village dog park begin flooding.
29.4 Near this height, the Flux Building of the Doe Run Company begins flooding.
28.3 Near this height, the walking trail (extension of Station Road) at Bates Memorial Park begins flooding.
22.8 Near this height, the bottom of the utility gravel road (Station Road) begins flooding.
About This Location Collapse

Latitude: 38.266061° N, Longitude: 90.373056° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 26 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 368.23 Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

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NWS Information
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12 Missouri Research Park Drive
St. Charles, MO 63304
(636) 441-8467
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