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_name_21 (rank INTEGER, county_and_state VARCHAR, capacity__thousands_of_metric_tons_ VARCHAR)

### Question ###
In Silver Bow County, Montana, when the capicity is more than 45 tons, what's the highest rank found?

### Accurate SQL ###

SELECT MAX(rank) FROM table_name_21 WHERE county_and_state = "silver bow county, montana" AND capacity__thousands_of_metric_tons_ > 45