COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-06-11 10:35 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-06-11 00:001280.08    2026-06-11 17:001281.25
2026-06-10 00:001278.74    2026-06-11 23:001281.46
2026-06-09 00:001277.83    2026-06-12 05:001281.65
2026-06-08 00:001277.18    2026-06-12 11:001281.84
2026-06-07 00:001276.41    2026-06-12 17:001282.02
2026-06-06 00:001275.95    2026-06-12 23:001282.19
2026-06-05 00:001275.47    2026-06-13 05:001282.35
2026-06-04 00:001275.22    2026-06-13 11:001282.52
2026-06-03 00:001274.97    2026-06-13 17:001282.65
2026-06-02 00:001274.57    2026-06-13 23:001282.72
2026-06-01 00:001273.64    2026-06-14 05:001282.77
      2026-06-14 11:001282.81
      2026-06-14 17:001282.84
      2026-06-14 23:001282.88
      2026-06-15 05:001282.91
      2026-06-15 11:001282.93
      2026-06-15 17:001282.95
      2026-06-15 23:001282.97
      2026-06-16 05:001282.99
      2026-06-16 11:001283.08
      2026-06-16 17:001283.18
      2026-06-16 23:001283.27
      2026-06-17 05:001283.37
      2026-06-17 11:001283.47
      2026-06-17 17:001283.56
      2026-06-17 23:001283.66
      2026-06-18 05:001283.75
      2026-06-18 11:001283.85
      2026-06-18 17:001283.95
      2026-06-18 23:001284.04
      2026-06-19 05:001284.14
      2026-06-19 11:001284.23
      2026-06-19 17:001284.33
      2026-06-19 23:001284.42
      2026-06-20 05:001284.52
      2026-06-20 11:001284.62
      2026-06-20 17:001284.71
      2026-06-20 23:001284.81
      2026-06-21 05:001284.9