| Flood Impacts |
| 23.0 | EXTREME FLOOD...EXTENSIVE RESIDENTIAL FLOODING BEGINS...ESPECIALLY UPSTREAM FROM UNION ST. BRIDGE. SOME EVACUATIONS NECESSARY. SERIOUS FLOODING UPSTREAM THROUGH PORTVILLE. DIKES OVERWHELMED. |
| 21.0 | MAJOR FLOOD...PROTECTIVE DIKES BEGIN TO BE TOPPED. SOME ROADWAY FLOODING IN RESIDENTIAL AREAS OF CITY BEGINS, ESPECIALLY UPSTREAM. SERIOUS FLOODING IN AREAS UNPROTECTED BY DIKES INCLUDING PORTIONS OF PORTVILLE. |
| 15.0 | THERE IS MODERATE FLOODING. WATER AFFECTS RIVERVIEW SCHOOL OF AVIATION, 1.5 MILES UPSTREAM OF UNION ST BRIDGE. LOCAL FLOODING OCCURS IN AREAS UNPROTECTED BY DIKES INCLUDING PORTIONS OF PORTVILLE UPSTREAM. |
| 12.0 | MINOR FLOOD...WATER OVERFLOWS ONTO E. RIVERSIDE DR. 1 TO 3 MI US FROM UNION ST BRIDGE. |
| 10.0 | FLOOD STAGE...FARM LANDS AND ROADS SEVERAL MILES FROM OLEAN FLOOD SLIGHTLY. NO DAMAGES. |
