Today the US Supreme Court will hear a 1 hour argument on the issue of
Maryland's sovereignty over the Potomac River to the Virginia shoreline.
Virginia objects to having to ask Maryland for permission to build
into the river from it's shore.

According to the Washington Post, Maryland's sovereignty over the
river was granted by the King Charles Charter of 1632. It was later
limited by the Compact of 1785 signed at Mt. Vernon giving Virigina
the "privilege" of making and carrying out sharves and other
improvements so long as they didn't interfere with boat traffic.
Another document, a boundary arbitration award, called
"Black-Jenkins", confirmed Virigina's privilege to erect structures
connected to the shore which may be necessary to "her full enjoyment
of her riparian ownership".

Virigina was forced to ask Marlyand for permission to build a water
intake pipe to the middle of the river, which Maryland initially
denied, and later allowed, but with a limited capacity. Virigina sued
and wants unlimited right to draw whatever water it wants through
pipes it wants to be able to erect without asking Marlyand.

LN