CREATE TABLE table_26387382_1 (year_operational NUMBER, location__county_ VARCHAR2, capacity__mw_ VARCHAR2)

What year was Fayette operational at 46?
SELECT MIN(year_operational) FROM table_26387382_1 WHERE location__county_ = "Fayette" AND capacity__mw_ = "46"
SELECT MIN("year_operational") FROM "table_26387382_1" WHERE "46" = "capacity__mw_" AND "Fayette" = "location__county_"