the cost of not maintaining trees
TRANSCRIPT
Two Types of Trees - Assets
Two Types of Trees - Liabilities
Assets● Storm Water Interception● Energy Conservation● Pollution Control● Quality of Life● Reduce Crime● Carbon Sequestration● etc... etc… etc… etc...
Liabilities● Sidewalk Damage● Power Outages● Clearance Issues● Leaf/Branch Litter● Maintenance● Personal Injury● Property Damage
Now What?
Three Options1. Remove all Trees
Three Options1. Remove all Trees2. Maintain all Trees
Three Options1. Remove all Trees2. Maintain all Trees3. “Bow-Tie Analysis”
Three Options1. Remove all Trees2. Maintain all Trees3. “Bow-Tie Analysis”
Life Cycles
Life Cycles
Vogt 2014
Young Tree Maintenance (1-3 years)
1. Buy It2. Plant It3. Water It4. Mulch It5. Water It6. Training Prune It7. Water It
Young Baby Maintenance (1-5 years)
1. Make It2. Carry It3. Deliver It4. Feed It5. Diaper Change It6. Stop Sleeping7. Feed It
Established Tree Maintenance (3-60 years)
1. Monitor It - Annually2. Prune It - 5 to 7 yrs3. Assess It - 7 to 10 yrs
Established Person Maintenance (5-60 years)
1. Monitor It2. Vaccines3. Schooling4. Life Coaching
Mature Tree Maintenance (60+ years)
1. Monitor It - Annually2. Prune It - Frequently3. Fertilize It4. Pest Management5. Removal
Mature People Maintenance (?+ years)
1. Monitor - Frequently2. Feed3. Nurse4. Facilities5. Funeral
Right Reason
Miracle Maples!
Miracle Maples!
“Expensive Trees”
Average Tree
Fine FineGet On With It!
Vogt 2015
311 Calls vs. Needed Tree Maintenance
Risk Rating
Average Training Pruning Cost = $2.70/tree
Average Structural Pruning Cost Mature Tree = $44.59/tree
Total Cost = $48/tree
Trees NOT Training Pruned Cost $78 - $112 per tree
So Cost of NOT Training Pruning is $30 - $64 per tree
Ryder & Moore 2013
A Fit Forest Reduces Risk and Costs
Bottom Line: Reduce Risk and Get Results
● In fall of 2007, two separate 70 mph winds hit the city of Elgin in a 24 hour period. This event generated 130+ calls for assistance for streets blocked, houses damaged, and other private property damages. Three city tree crews and two contractor crews were mobilized to respond to the calls over 7 day period.
● In February of 2010, ARRA funds were used to remove over 800 of the highest liability trees identified on the assessment
● In fall of 2010, the city was struck with two 70+mph wind events in a 24 hour period. This storm was similar in nature to the event of 2007. 32 calls for assistance were received. Two city crews were able to handle the event without contractor's assistance within 24 hours.
