I don't see any obvious evidence of pathogenic fungi or tree-killer insects. Bark is often colonized by insects with no effect on the living part of the tree. The outer bark of larger Douglas-fir can be degraded by a variety of agents including insects, fungi, physical abrasion, or landscape cultural practices such as sprinkler irrigation. Is this tree affected by irrigation that sprays water on the lower trunk? Residues from periodic sprinkler irrigation that evaporates often leave a whitish appearance like this.

The first thing to look at when assessing  tree health is the condition of the foliage, particularly in the upper half of the tree crown. Significant tree health problems most often become apparent in declining foliage - thinning, yellowing or browning, top dieback, etc. As the growing season gets going, you should see vigorous new growth. If you see evidence of foliage decline or low vigor, that is a sign of trouble. If it stays healthy and puts out lots of new growth, there is probably no immediate health issue.