Throw out what is written................there are only two entrances to and fro teh Tidal basin with regards to water..........one......to the West................to the Potomac river..........one to the East, to the Wash channel......


Here is a pic...........

1. 

Tidal Basin
Reservoir in Washington, D.C., United States of America
The Tidal Basin is a partially man-made reservoir between the Potomac River and the Washington Channel in Washington, D.C. It is part of West Potomac Park and is a focal point of the National Cherry Blossom Festival held each spring. Wikipedia
Area: 106 acres
Surface elevation: 3'
Mean depth: 10' 0"
Inflow source: Potomac River
Outflow location: Washington Channel