where does the water in the Potomac River come from? where does it go?
how can you know that the water from the Potomac River is safe to drink... or not? how can you tell if the fish from the Potomac River are safe to eat... or not?
what threatens the water quality of the Potomac River? what is a TMDL? who determines a section of a river/lake should be on the "dirty water list"? who will pay to get the waterbody removed from the list?
who owns the Potomac River? who issues fishing licenses? who authorizes new withdrawals of water from the river?
should jet boats/jet skis be permitted on the Potomac River? what jurisdiction could deny a permit?
why was the Potomac River a potential route for foreign invasion? did hostile enemy forces ever go past where you are viewing the river? how would you have stopped the British from attacking Alexandria in the Revolutionary War?