Greetings All Arcviewers,

     My most humble apologies for being so late in posting a SUM - I never
forgot you!  Thank you to all those who offered suggestions, including:
Chris Gerecke, Anita, Kendis Willet, Yew Yuan, Kathi Hannaford, Jose Luis
Portillo, Peter Taylor, Eric Nischan, Scott Web, Michael Schnirch, and
Nicolo Pitsch.  I hope I got everyone - if I missed you I am sorry and I
thank you also.
     The most popular suggestion regarding the calculation of distance along
a river channel involved the xtools extension.  I downloaded this extension
from the esri arcscripts webpage and it worked beautifully!  In order to
calculate the distance from point A to point B I needed to create a new line
theme and draw it manually down the middle of the river.  Afterward, I
clicked on the "calculate area, perimeter, length, acres, hectares" function
and the length of the line popped up in the attribute table.  There were
some other very good suggestions, however, I am new with ArcView and I felt
that this extension was the most uncomplicated solution to my problem.
     Regarding the calculation of slope along the channel, here are some
suggestions.  Kathi suggested that I need to "pick out (estimate) the
elevation at the top of the channel and at the bottom of the channel and
then subtract and divide by the summed length from above."  Also, Kendis
suggested two extensions: "getgridvalue21" and the "polytpts" extension both
found at the esri arcscripts webpage.  Kendis said to make the desired
points with the polytpts extension and then use the getgridvalue to extract
the heights for each point.  Then, manually go in and create a new field in
the line theme and use the elevations and lengths to get slope.
     Thanks again for your help.

Cheers,

Andrew Carnegie