CREATE TABLE "major_dams_and_reservoirs" (
  "dam_constructed" text,
  "year_completed" real,
  "impounded_body_of_water" text,
  "reservoir_capacity" text,
  "dam_wall_height" text,
  "dam_type" text
);

Question: Which Year completed has a Dam type of concrete gravity, and an Impounded body of water of deep creek reservoir?
SQL: SELECT MIN("year_completed") FROM "major_dams_and_reservoirs" WHERE "dam_type"='concrete gravity' AND "impounded_body_of_water"='deep creek reservoir';

Question: Which dam type was completed in 1961?
SQL: SELECT "dam_type" FROM "major_dams_and_reservoirs" WHERE "year_completed"=1961;

Question: Which Year completed has a Dam type of earthfill embankment, and a Dam constructed of khancoban dam?
SQL: SELECT MAX("year_completed") FROM "major_dams_and_reservoirs" WHERE "dam_type"='earthfill embankment' AND "dam_constructed"='khancoban dam';

Question: Which Reservoir capacity has an Impounded body of water of tumut two pondage?
SQL: SELECT "reservoir_capacity" FROM "major_dams_and_reservoirs" WHERE "impounded_body_of_water"='tumut two pondage';