Would the OP or anybody here really feel confident if that tree was overhanging a kid's playground?
Yes. Confidence intact. That tree stood up to 70 mph winds following the initial pruning.
How is a playground used <5 hours a day a higher target than Main Street and a US Highway? Your first post mentioned hapless motorists and pedestrians, now lil kids on a swingset, next what--a schoolbus full of blind orphans, all destined to win Nobel prizes? No matter what target you conjure, the confidence is the same. I only specified the initial pruning; the city's bucket brigade carried it out, and yes, quite well. :msp_smile:
I did followup pruning and a cable for free so let's not whinge about budgets. If billed it may have been ~$5-700, a drop in the municipal budget, so no more about waste, please, unless you think veteran trees are worthless. And no one hires me to manage their budgets--I'm just a tree guy, not an investment counselor. NOMB.
This tree may well be standing longer than any of us--unless your crystal balls are packing predictive power by being attuned into a divine wavelength! :cool2:
Seeing many failures may jaundice you, but they should also show more about how trees fail, so you can prevent it.
Del ol buddy, you want me in a new insurance pool because I work on old trees? What about the hacks who top and overraise and cut roots on mature trees--they're the ones whose premiums should get raised! In Raleigh the city crews go over, not through root systems. That ain't rocket surgery. :bang:
"As soon as you correct a potential problem a lawyer could twist that around as prior knowledge that a tree was dangerous and could fall. You lively hood is tied to the trees survival. "
Way exaggerated. Standards followed, livelihood secure. All trees could fail, and all lawyers can twist--and shout! (Shake it all baby now...) Attached re paranoia about liability (read what Pete Morris had to say), with another hollow (see palm roots) leaner, this time over US #1. That one also screwed up by sidewalk works, but still kickin.
re fearing the sidewalk crew will screw up the roots--already happened! They've been encouraged to prune no more--grinding and ramping is basic stuff.
SIDEWALK STRATEGIES
Reducing Infrastructure Damage by Tree Roots: A Compendium of Strategies was recently released by the International Society of Arboriculture. It was authored by University of California Cooperative Extension’s Larry Costello, who also wrote last year’s excellent Abiotic Disorders of Landscape Plants. Many strategies for resolving conflicts between mature trees and sidewalks, creatively merging the green infrastructure with the gray, are detailed in this book. In order of impact they are:
1. Remove old panels. Install a new sidewalk of packed stone, asphalt, pervious concrete or concrete curved away from buttress roots. (If concrete, reinforce with fiberglass rebar, wire mesh, or standard rebar)
2. Remove old panels. Bridge buttress roots with packed structural soil and sand under fabric. Install sections of recycled rubber, asphalt, bricks, pavers, pervious concrete or concrete above.
3. Leave heaved sidewalk in place and make the surface smoother by either
grinding down the lifted edges, making asphalt or concrete wedges or ramps, or both.
4. Remove old panels, prune roots, and install new panels at original grade.
This last option is still commonly done in North Carolina, with predictable results. Several historic trees in one town died soon after having major roots pruned. One root-pruned maple tree in another town toppled over and crushed a vehicle and its driver. It is clear that this treatment often shortens the safe useful life of trees. It’s time to find a better way.
Strategies #1-3 are ADA-compliant and often cost little more than #4. If you factor in tree removal and replacement expense, not to mention liability exposure, they cost far less. Specific engineering details and case studies are clearly presented, along with a list of material suppliers. Reducing Infrastructure Damage by Tree Roots is a goal we can all agree on, so this book is an important new tool for urban foresters. You can order it via
International Society of Arboriculture or call 217-355-9411.