A busy Ottumwa intersection will be closed starting Monday (8/9).  The intersection of Main and Market Streets will be closed to replace brick pavers that have settled with new concrete.  The brick paver crosswalks will also be replaced.  Once that work is done, construction crews will move to the intersection of Main and Green Streets for the same type of work.  Drivers will need to use alternate routes.  The project is expected to take three to four weeks, weather permitting.