COLUMBIA--THE DALLES DAM (TDAO3)
| Observed | Forecast/Trend Issued: 2026-05-01 16:12 PDT | ||
| Date/Time (PDT) | Pool Height | Date/Time (PDT) | Pool Height |
| 2026-05-02 00:00 | 158.35 | 2026-05-02 11:00 | 158.29 |
| 2026-05-01 00:00 | 158.6 | 2026-05-02 17:00 | 158.29 |
| 2026-04-30 00:00 | 159.22 | 2026-05-02 23:00 | 158.29 |
| 2026-04-29 00:00 | 159.01 | 2026-05-03 05:00 | 158.29 |
| 2026-04-28 00:00 | 158.9 | 2026-05-03 11:00 | 158.29 |
| 2026-04-27 00:00 | 158.41 | 2026-05-03 17:00 | 158.29 |
| 2026-04-26 00:00 | 158.29 | 2026-05-03 23:00 | 158.29 |
| 2026-04-25 00:00 | 158.51 | 2026-05-04 05:00 | 158.29 |
| 2026-04-24 00:00 | 158.89 | 2026-05-04 11:00 | 158.29 |
| 2026-04-23 00:00 | 159.07 | 2026-05-04 17:00 | 158.29 |
| 2026-04-22 00:00 | 157.86 | 2026-05-04 23:00 | 158.29 |
| 2026-05-05 05:00 | 158.29 | ||
| 2026-05-05 11:00 | 158.29 | ||
| 2026-05-05 17:00 | 158.29 | ||
| 2026-05-05 23:00 | 158.29 | ||
| 2026-05-06 05:00 | 158.29 | ||
| 2026-05-06 11:00 | 158.29 | ||
| 2026-05-06 17:00 | 158.29 | ||
| 2026-05-06 23:00 | 158.29 | ||
| 2026-05-07 05:00 | 158.29 | ||
| 2026-05-07 11:00 | 158.29 | ||
| 2026-05-07 17:00 | 158.29 | ||
| 2026-05-07 23:00 | 158.29 | ||
| 2026-05-08 05:00 | 158.29 | ||
| 2026-05-08 11:00 | 158.29 | ||
| 2026-05-08 17:00 | 158.29 | ||
| 2026-05-08 23:00 | 158.29 | ||
| 2026-05-09 05:00 | 158.29 | ||
| 2026-05-09 11:00 | 158.29 | ||
| 2026-05-09 17:00 | 158.29 | ||
| 2026-05-09 23:00 | 158.29 | ||
| 2026-05-10 05:00 | 158.29 | ||
| 2026-05-10 11:00 | 158.29 | ||
| 2026-05-10 17:00 | 158.29 | ||
| 2026-05-10 23:00 | 158.29 | ||
| 2026-05-11 05:00 | 158.29 | ||