| Answer | Crossword Clue |
|---|---|
| CROIX | St. ... (river to the Mississippi) |
| EADS | ... Bridge, first to span the Mississippi at St. Louis |
| OHIO | River to the Mississippi |
| RED | River to the Mississippi |
| OHIO | River from Pittsburgh to the Mississippi |
| YAZOO | Mississippi river to the Mississippi River |
| OHIO | River from Pittsburgh to the Mississippi. |
| IOWA | River flowing SE to the Mississippi |
| rooter | buffalofish, Ictiobus niger, of the Great Lakes and Mississippi River drainage systems south to Mexico |
| HOOVERDATUM | "The first occupant of the White House to be born west of the Mississippi River," e.g.? |
| OTTAWA | River to the St. Lawrence |
