user: ### NOW ANSWER:
Question: What is the height of the Fort Peck Dam which was built before 1968, is locaTEd in the United States and has a dam type of TE ?
Columns: ['Name', 'Country', 'Year', 'Structure Height [m]', 'Structure Volume [10 6 m 3 ]', 'Reservoir Volume [10 9 m 3 ]', 'Type']
Types: ['text', 'text', 'real', 'text', 'text', 'real', 'text']
Sample row: ['Syncrude Tailings Dam Mildred MLSB', 'Canada', 1995.0, '88', '540/720', 0.35, 'TE']
SQL:

assistant: SELECT "Structure Height [m]" FROM "Table" WHERE "Year" < 1968.0 AND "Type" = 'TE' AND "Country" = 'United States' AND "Name" = 'Fort Peck Dam';