🚀 go-pugleaf

"Tom Hand" <troybuoy@altavista.com> wrote in message
news:bx6d8.1900$17.1221361@newsfeed1.thebiz.net...
>
> "billnech" <billnech@msn.com> wrote in message
> news:a51q46$40sh0$1@ID-103407.news.dfncis.de...
> >
> > "Tom Hand" <troybuoy@altavista.com> wrote in message
> > news:xGPc8.1866$17.1202983@newsfeed1.thebiz.net...
> > >
> > > "Horseman of Sleepy Hollow
<http://www.rev.net/people/aloe/longisland>"
> > > <aloe@rev.net> wrote in message
> > > news:3c737514$0$489$4c41069e@reader1.ash.ops.us.uu.net...
> > > > "Tom Hand" <troybuoy@altavista.com> wrote in message
> > > > news:<hrnc8.1819$17.1171314@newsfeed1.thebiz.net>...
> > > > > "Icabod Crane <http://www.rev.net/people/aloe/longisland>"
> > > <aloe@rev.net>
> > > > > wrote in message
> > > news:3c71fdc2$0$23183$4c41069e@reader1.ash.ops.us.uu.net...
> > > >
> > > > > > The lowest land in the state of New Yorkshire is at sea level.
> > > > > > Therefore, sea level is as far downstate as you can get. Tide
> > reaches
> > > > > > West Point.
> > > >
> > > > > Correction: Tide reaches Troy.  Maybe salt reaches West Point.
> > > >
> > > > Where's my head? Of course, you are right. The water is brackish up
to
> > > > West Point.
> > > >
> > > > What is the altitude of the river bank in Troy?
> > > >
> > > > -- Horseman of Sleepy Hollow
> > > > <http://www.rev.net/people/aloe/longisland>
> > >
> > > The Troy/Cohoes dam, which is usually cited as the limit to the tide
in
> > the
> > > Hudson River, is 185 feet above sea level.
> > >
> > A 185 foot tide?  I don't think so.
> >
> > Actually, the Hudson River below the Troy Dam averages at 1.3 feet above
> sea
> > level.  That's one point three.  The Troy Dam raises the water level 14
> > feet.  Information is from the New York State Canal Corporation.
>
> Not according to a US Geological Survey map I have in my possession.  The
> Dam (and lock 6) are 185' and lock 7 is 211'.  1 foot makes no sense at
all.
> It would take the water years to flow to the ocean from the mountains.
>
We can't be talking about the same thing.  Lock 6 and 7 are either up the
Mohawk on the Erie Canal or well up the Hudson on the Champlain Canal.  Lock
6 of the Erie Canal is the tip of the flight of locks that gets the canal
from the Hudson to above the Cohoes Falls.  That lock raises the water level
from 117.75 feet to 151 feet.  Lock 6 on the Champlain Canal is in Fort
Miller and raises that canal from 102 to 119 feet along the Hudson.

The Troy Federal Lock and Dam, however, raises the Hudson from 1.25 feet to
15.2 feet.  As Casey Stengel said, you can look it up!


Below the Troy Dam, the Hudson is essentially an estuary.  The volume of
water from higher reaches pushes the water out to sea, but there is only a
negligible drop in elevation.  There are no dams...no rapids.  And ocean
going ships travel as far as Albany.  Absent a lock, ships cannot travel up
hill.

When looking at your USGS map, bear in mind that elevations change rapidly
and sometimes it's difficult to look at the map and judge the correct
elevation.