Montgomery Point Lock & Dam
White River (MPDA4)
Mississippi River at Helena Mississippi River at Arkansas City
Lock No. 1
Time Elevation Tailwater
Date CS/CDT (ft-NGVD29) (ft-NGVD29)
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16AUG2026 0800 118.72 118.52
16AUG2026 0900 118.72 118.50
16AUG2026 1000 118.73 118.50
16AUG2026 1100 118.72 118.50
16AUG2026 1200 118.71 118.50
16AUG2026 1300 118.74 118.54
16AUG2026 1400 118.75 118.54
16AUG2026 1500 118.76 118.56
16AUG2026 1600 118.78 118.57
16AUG2026 1700 118.79 118.57
16AUG2026 1800 118.81 118.60
16AUG2026 1900 118.83 118.61
16AUG2026 2000 118.86 118.64
16AUG2026 2100 118.90 118.67
16AUG2026 2200 118.94 118.71
16AUG2026 2300 118.94 118.72
16AUG2026 2400 118.96 118.74
17AUG2026 0100 118.99 118.78
17AUG2026 0200 119.04 118.83
17AUG2026 0300 119.06 118.86
17AUG2026 0400 119.12 118.90
17AUG2026 0500 119.12 118.92
17AUG2026 0600 119.17 118.95
17AUG2026 0700 119.21 119.01
17AUG2026 0800 119.24 119.05
17AUG2026 0900 119.33 119.12
17AUG2026 1000 119.37 119.15
17AUG2026 1100 119.41 119.21
17AUG2026 1200 119.47 119.26
17AUG2026 1300 119.52 119.30
17AUG2026 1400 119.56 119.36
17AUG2026 1500 119.64 119.42
17AUG2026 1600 119.66 119.47
17AUG2026 1700 119.72 119.51
17AUG2026 1800 119.79 119.60
17AUG2026 1900 ---- ----
7-Day Plot Data
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