Question: What is the total of the River Mile in Greenup, Kentucky?
SQL: SELECT SUM("River Mile") FROM "2-18621204-2" WHERE "Location [L ]" = 'Greenup, Kentucky';

Question: What is the River Mile with a RDB lock side and a pool length of 55.4?
SQL: SELECT "River Mile" FROM "2-18621204-2" WHERE "Lock Side" = 'RDB' AND "Pool Length (miles)" = '55.4';

Question: What is the highest River Mile that has a pool length of 42.2 miles or a lock/lift drop of 21 feet?
SQL: SELECT MAX("River Mile") FROM "2-18621204-2" WHERE "Pool Length (miles)" = '42.2' AND "Lock Lift/Drop (in feet)" = '21';

Question: What is the location of the river mile that is larger than 938.9, and Olmsted Locks and Dam?
SQL: SELECT "Location [L ]" FROM "2-18621204-2" WHERE "River Mile" > 938.9 AND "Locks & Dam" = 'Olmsted Locks and Dam';