Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_27435931_1 (elevation_m VARCHAR, year VARCHAR)

### Question ###
what was the elevation in september 2009?

### Accurate SQL ###

SELECT elevation_m FROM table_27435931_1 WHERE year = "September 2009"