Using KTVX ABC as an example, here is its coverage for your estimated location:
you are on the fringe
If you had moved here the signals could have passed between the LDS Church and Fox Hollow Elementary School and would have been a lot stronger
http://www.tvfool.com/?option=com_wr...b97dc9aa040054
It's the terrain that makes the difference.
The 91XG has a tilt feature. It
might help to tilt the front end up a little.