I ran into Marv and Sue Elliot who told me about all the butterflies they saw up 
on the powerline . So I went to see for myself, all I can say is Wow was a good 
day on the powerline for butterflies.
 in addition to their list
Black Swallowtail
M. Cloak
Red Admiral  
E. Comma
E. Pine Elfin
Clouded Sulphur
Spring Azure
and Silvery Blue

 I found the following:

Juvenal's Duskywing  many
Spring Azure 6, one of the spring Azures I found had very strange marking
                       see attached image
Eastern Pine Elfins  many   very fresh quite beautiful
Gray Coma  1
American Lady 1
Mustard White  5 

Peter Manship