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| Event | Ice-Out |
| Date of Sighting | 03/12/12 |
| Comments | Lake Monona is ice free at 6 pm. There was still considerable rotten ice visible around 9 am earlier in the day. |
| Location | Madison |
| State/Province | WI |
| Latitude | 43.13 |
| Longitude | -89.32 |
| email this observer | |
| Observer's First Name | Eric |
| Observer's Last Name | Johnson |
| Teacher's First Name | Eric |
| Teacher's Last Name | Johnson |
| Grade | |
| School | not applicable |
| City | Madison |
| State/Province | WI |
| Country | |
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