Imminent Failure Potential

1
Imminent Failure Potential

• Condition of tree or tree part is highly
  unstable, and failure could occur without further
  warning.

2
Imminent Failure Potential
Root sprung
3
Imminent Failure Potential
Recent lean
4
Imminent failure potential
Detached branches, hung up tops, hung up trees
5
Imminent failure potential
Loose bark
6
Likely to Imminent Failure Potential
Fomitopsis pinicola

• Dead trees that are not sound

7
Likely to Imminent Failure Potential

• Fire-killed trees that are not sound

8
Likely to Imminent Failure Potential
Significant heart rot for example many conks
within several feet
9
Likely to Imminent Failure Potential
Dwarf Mistletoe Bole infection with decay over ½
bole diameter Canker with deep depression, bole
tissue missing over ½ bole diameter
10
Likely to Imminent Failure Potential
Severely undermined root systems
11
Root disease symptoms but still aliveLikely to
Imminent FP

• Root rots that often cause failure in trees with
  green crowns
• Laminated root rot
• (Phellinus weirii) on DF, WF, GF, and MH
• Annosum root and stem rot
• (Heterobasidion annosum) on WF, GF, SAF