The poster child for this type of thing is the lower Mississippi
River.  Pull out your trusty Rand McNally road atlas, and check
the path taken by the river compared to various state lines.  There
are sections where the river has moved and left parts of states on
the wrong side of the river.

Heading south, there is a section of Missouri on the east side of
the river by Ste Geneviere, and the old city of Kaskaskia, Illinois
on the west side of the river.  A cut off loop left a part of
Missouri on the east side of the river near Grand Tower.  This
happens twice in Kentucky, and then occurs on a regular basis
starting in Tennessee.  There is a double loop like this south
of Helena where two adjacent loops were cut off, leaving a
piece of Arkansas on the east side of the river, and a piece
of Mississippi on the west side of the river.

This geographical oddity becomes very dramatic near the city
of Greenville, Mississippi.  Greenville was once a river town,
but a change in the river path left its riverfront area miles
from the great river.  Former bast sweeping loops in the river
has left the state lines looking like a jigsaw puzzle, while
both the old and new river bridges sit entirely within the
state of Arkansas (both the west and east ends of the bridge
are in Arkansas).

Vicksburg has a similar issue where the river changed course
and left the waterfront dry.  The city solved this problem by
rerouting the Yazoo River to flow past the downtown.  Tourists
often mistake the small Yazoo River for the mighty Mississippi,
which is over a mile from the historic river landing at Vicksburg.

The river bridges at Natchez cross between Louisiana and
Mississippi, but due to a cut-off loop, US-84 ends up running
parallel to the state line for 8 miles as it heads west away
from the river and the river bridge.

The cut-off loops become a moot point once the river leaves
Mississippi, and runs fully within Louisiana.

The Missouri River also has a few such geographical oddities.
Heading north out of KC, we find that the St. Joseph airport
is on a cut-off loop, and despite being a mile west of the
river, it is fully within the state of Missouri.  In another
case, the city of Carter Lake, Iowa, is on the west side
of the Missouri River, and is located between Omaha and the
Omaha Airport, both of which are in Nebraska and on the west
side of the river.

-john-

One of the big concerns in this are has been the Ohio River.
The state of {commonwealth actually) has always claimed the Ohio River
as belonging to them. To within 10 feet of the high water mark on the
opposite shore. That was fine until dams were installed and the high
water mark rose along with it. Causing the other states to lose real
estate.

So in the cases of flooding, and say the water protrudes 200 feet into
Ohio, does mean then that the state of Kentucky is responsible for
cleanup?

Then recently, the state of Georgia is trying to claim that the
original surveyors got the line wrong for dividing Tennessee.
Georgia claiming the line to be a mile north of where it actually is
so that Georgia can tap the resources of the Tennessee River.

On May 24, 9:30 am, moro...@world.std.spaamtrap.com (Michael Moroney)
wrote:

A similar things although I don't believe any town lines were
*changed* in the process -- the Remnants of the Flagstaff town line
can be seen winding their way thru Flagstaff Lake:
http://mapper.acme.com/?ll=45.21010,-70.36880&z=14&t=T