Q.Why are my 30 yr. old junipers dying?
Why are my 30 yr. old junipers dying? My junipers are dying one by one.

Certified GKH Gardening Expert
There are several pests and diseases that can kill juniper trees, and unfortunately, some of these are not treatable.
The following articles may help you determine what the problem is. Also look into which of the pests discussed in the articles are prevalent in your region.
http://www.clemson.edu/extension/hgic/pests/plant_pests/shrubs/hgic2056.html
http://ucanr.edu/sites/mgslo/newsletters/juniper_branch_death28050.htm
http://aces.nmsu.edu/ces/yard/2000/052000.html
http://extension.wsu.edu/snohomish/juniper-troubles/