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_61605 ( "Location" text, "Partner" text, "Construction Start" text, "Inauguration Date" text, "Population Served" real, "Design flow (LPM)" real )

### Question ###
What is the total Design flow (LPM) with a Partner of app, a Construction Start of 2008 january, and a Population Served larger than 3500?

### Accurate SQL ###

SELECT SUM("Design flow (LPM)") FROM table_61605 WHERE "Partner" = 'app' AND "Construction Start" = '2008 january' AND "Population Served" > '3500'