user: Question: What is the most minimal Final year that has a North or east end of Covington?
Columns: ['South or west terminus', 'North or east terminus', 'First year', 'Final year', 'Notes']
Types: ['text', 'text', 'real', 'real', 'text']
Sample row: ['Muskegon', 'Detroit', 1926.0, 1962.0, 'Replaced by I-96']
SQL:

assistant: SELECT MIN("Final year") FROM "Table" WHERE "North or east terminus" = 'Covington';