what was the lowest elevation in april 2006?
CREATE TABLE table_27435931_1 (elevation_ft INTEGER, year VARCHAR)
SELECT MIN(elevation_ft) FROM table_27435931_1 WHERE year = "April 2006"
### Context: CREATE TABLE table_27435931_1 (elevation_ft INTEGER, year VARCHAR) ### Question: what was the lowest elevation in april 2006? ### Answer: SELECT MIN(elevation_ft) FROM table_27435931_1 WHERE year = "April 2006"