![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiT1oxuFvl47uZP8paqaQewLp1wgAONsXSY8iSPhbcPcSvDOeZNgMRP4rIVVzuPFLLZs9-4PKCF589ibpkMmYT0GEZrI97cMNr2pszrKGUldN07KOQK5qaBc892GafCsHWnOBYCRmMeGjc/s320/Norway1.jpg)
Biases:
+ Big tree providing much appreciated shade all day in the summer. Significant tree in the neighborhood.
- Norway Maples are getting a bad reputation for being dispersive.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_r44Wv9damHUo5NAKAynQc0NQoVfIJZ56Y1SG-agqaq6sce5zrduRpx6NUUntD6VMnYScFU40Pjp32EOV8pWjEKSMqcGnILYAHwNYKop2EjyZOpCcCO6nRTct2084rFgKveIqqhxbXZk/s320/Norway2.jpg)
Tree Characteristics
A very large Norway Maple (Acer platanoides) a mature tree with a single trunk DBH 31". Live crown ratio is around 80%.
Tree Health
New foliage looks healthy. Some decay possible at main branch attachments.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_wrO23NIHS-6rbJ5ZXd6KKm7C5mq0q7HTvyokJ3x-X-NxTk6RHsk-_sFT3fhqmlj-1EIDtIDsonrJ9jXBs7gzLThlQ7IYjdIinsPJSTNOQ4jEDvXnTeYyl8VPyf0KenZMS8cGfZfjtBI/s320/Norway3.jpg)
Site Conditions
Residential street tree dominating the local canopy. Downslope from a lawn that may receive regular irrigation. No signs of recent site disturbance. Paving under 60% of the dripline, mostly to the North. No evidence of recent changes to paving, fill, or grade work in the dripline. Slope grade flat at base of tree with a 15 degree slope up to the south.
Targets
Two houses, cars.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRo1jthiM03Yg7hkoZ9hiELGKQHqax-0KY1t-LRS1X3ehZIvsTMktqzjmcu87wggHE6FLlBnriHzxfIvNGnqBJZDG-a3cslKeODhUrztk5sgOtOCz9BKWFrx6H9hrhx6ni0OK-F0DXtx0/s320/Norway4.jpg)
Tree Defects
Constrained root space by sidewalk, street and nearby slope.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg720kyTzwzCIfKcyJlvmL8mw6R4hWks9E41MQ2W-LkZK3ucShLdYOyK3IO3t1sYmF4ZsNU3PE2Xpa8D2cFDsOIVQahwl6VHDUg_O4yL_9EfJ6R8gcmxH1imy1cuzrkSiw7O5jfVDq6W18/s320/Norway5.jpg)
Hazard Rating
Part most likely to fail: branch failure. Moderate failure potential on large parts with significant targets for a hazard rating of 2+3+4 = 9.
Hazard Abatement
Investigate possible decay. Prune to remove end weight of large lateral branches. Monitor. Rationale: Need more data to determine if there is decay to be concerned with. It is not clear to me that cabling would be indicated in this case. "There is a limit to the size and weight cable and brace systems can support".
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZe6SCqt-akPZzaRM9Z4FONSckjuwy2bCPPDVtIF8qW1cIl8KAwrmi1WMtOMpkO7xp6fPUjA0orSwF6EIGPsLurGE48UDBqiHRiGSH8bNow2Jfd6CmccrUucJ4uiB-8p2_icIHjpXOEpA/s320/Norway6.jpg)
Other Recommendations
Long term it would be good to consider what will succeed this tree and when.
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