CREATE TABLE table_name_93 (structure_height_ VARCHAR, m VARCHAR, name VARCHAR, country VARCHAR, year VARCHAR, type VARCHAR)

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 ?
SELECT structure_height_ AS "m" FROM table_name_93 WHERE year < 1968 AND type = "te" AND country = "united states" AND name = "fort peck dam"
SELECT "structure_height_" AS "m" FROM "table_name_93" WHERE "country" = "united states" AND "fort peck dam" = "name" AND "te" = "type" AND "year" < 1968