Patuxent River
The Patuxent River is a tributary of the Chesapeake Bay in the state of Maryland.  There are three main river drainages for central Maryland:  the Potomac River to the west passing through Washington, D.C., the Patapsco River to the northeast passing through Baltimore, and the Patuxent River between the two.  The   Patuxent watershed had a rapidly growing population of 590,769 in 2000.