R15, I plotted the points you and K273 discussed which look like...

R15, I plotted the points you and K273 discussed which look like this. If you then look at the unit for the Cris II you can see an old well to the right of Desiree which could be that referred in coy ann. Your research stacks up & should be pretty close. GGP ann makes confusing as target is further north so either longer to BHL or a different well. Could be totally wrong also.

http://ucmwww.dnr.state.la.us/ucmsearch/UCMRedir.aspx?url=http%3a%2f%2fdnrucm%2fucm%2fgroups%2fconservation%2fdocuments%2fooc%2f4592309.pdf