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_17798 ( "Year" real, "Road Opened" text, "Road Closed" text, "Freight Carried s Tonne" real, "Super B Capacity Reached [ citation needed ]" text, "Number of Truck Loads North" real )

### Question ###
When was the super b capacity reached when the freight carried s tonne was 198818?

### Accurate SQL ###

SELECT "Super B Capacity Reached [ citation needed ]" FROM table_17798 WHERE "Freight Carried s Tonne" = '198818'