47 year old juniper with browning branches

Asked June 16, 2017, 10:02 PM EDT

This juniper has shown a little browning since last fall, but in the last couple of weeks it has advanced--in area and brown color. On two sides there is a fairly big split or crack in the bark--not new. Don't see any critters anywhere or any small holes in the bark watered 3x / week by sprinkler system. No Roundup used anywhere near, fertilized only by lawn fertilizer. . My question is "what can I do to save this tree?"

Arapahoe County Colorado

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