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_62076 ( "Dam constructed" text, "Year completed" real, "Impounded body of water" text, "Reservoir capacity" text, "Dam wall height" text, "Dam type" text )

### Question ###
Which Year completed has a Dam type of earthfill embankment, and a Dam constructed of khancoban dam?

### Accurate SQL ###

SELECT MAX("Year completed") FROM table_62076 WHERE "Dam type" = 'earthfill embankment' AND "Dam constructed" = 'khancoban dam'