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TREE HIEGHT
I have cut down quite a lot of trees on my property & others. Some 100+ tall, growing 3' next to our cabin ( had help from friend with a 4X4 tractor). But I have one in my front yard that when felled could come close to hitting a telephone line.
So my question---Is there a way to determine the height of a tree accurately?
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TREE HIEGHT
Skip, I did not realize there were trees in your region that grew so tall. Impressed Will not give you the smart donkey answer that Earthwerks will, sure tape measure and tree spikes. 
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TREE HIEGHT
If the tree (call it t) throws a shadow, measure that. We'll call it s. Plant a stake of known height upright. Call it k. Measure its shadow. Call it ks.
In the equation t:s::k:ks (a simple ratio) you know all the figures except t, so just solve it for that, which will give you the tree height.
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TREE HIEGHT
To determine the height accurately with limited tools I have used some geometry. I took a framing square and a level. On the framing square I tape a yard stick at a 45 degree angle then tape it to the level. I then use this to sight the top of the tree on the 45 degree line with the level. The distance I am from the tree then is the height of the tree plus the distance from the ground I am holding the level.
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TREE HIEGHT
To determine the height accurately with limited tools I have used some geometry. I took a framing square and a level. On the framing square I tape a yard stick at a 45 degree angle then tape it to the level. I then use this to sight the top of the tree on the 45 degree line with the level. The distance I am from the tree then is the height of the tree plus the distance from the ground I am holding the level.
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TREE HIEGHT
Dennis----not sure this will work as all of my property is on a 10° - 15° slope.
auebach---Your shadow method may work even though my property is sloped--not sure.
KT--Tape measure & tree spikes---not even gonna think bout that one  .
Could not try the methods yesterday--no sun & very cold--maybe today.
THANKS GUYs for the info.
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TREE HIEGHT
Skip, if you stand to the side of the tree and not up hill or down hill the two methods should work.
A different thought here, have you talked with the phone company on this. At least here sometimes a utility company will take down a tree to prevent possible damage to their lines. If they don't do that they may at least help with info on height and how to cable it for safety.
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TREE HIEGHT
If you have to stand at an elevation higher or lower you can calculate your elevation relative to the tree trunk by using a 2x4, a ruler and the level.
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TREE HIEGHT
The ground has to be level for the shadow method. If you make the felling cut 10 feet up, the tip will land 10 feet closer to the stump. (Use holding-ropes and helpers, because you want to be on solid ground when it starts to go.)
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TREE HIEGHT
Aaaaa----- auebach----Good advise there---why in the world I never thought of that as the tree is is just with in close range to taking down a line as I See it. I do have a pole saw ( cheap ) that I could use as the tree is bout 8"- !0" ( & dead ) in diameter .
The shadow method did not work as the shadow ran off a drop off, then not seen.
The method from Dennis was hard to do---even though I have a talking level-----Think ya need 2 people for this.
HEY---Learned a lot here----THANKS Guys 
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Gas Generator Weather Protecti
10-19-2011, 15:08 
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