Yesterday I went to my forest Mecca, not satisfied that I had resolved the height of a pine I measured to 149.4 feet on April 30th. Below is a copy of the report I sent to selected people in DCR and others yesterday.
Images of Purty Pine follow.Today I returned to Mohawk to answer the big question. Is the white pine that I measured to 149.4 feet on April 30 possibly taller? I was fairly close to it when I got the 149.4 feet. (Dave, I told you 149.7, but made a mistake in my math.) My hypotenuse shot on the 30th was only 50 yards. But today after searching for about 15 minutes I found an acceptable location and marked the spot. I then went to the tree and placed a yellow marker at 7.4 feet above mid-slope. From the distant location I had marked I then got a hypotenuse distance of 63 yards to the crown. I moved forward slightly and still got 63, but couldn't see the crown spot as well. From the measurement location, I finally settled on a hypotenuse distance of 63.1 yards to the crown spot. I got measurements of between 44.1 and 44.3 degrees for the angle. Lots of shots were 44.2 degrees. So, 44.2 it was, the most prevalent return and also the average of the high and low. The yellow marker was 11.0 feet below eye level, determined with my TruPulse 360. But, I had to shift right to a location 0.5 feet lower than my spot to adequately see the marker (also determined with the 360). So from my location, eye to base was 7.4 + 0.5 + 11.0 = 18.9 feet and height above eye level was 63.1(3)sin(44.2)=132.0. The sum = 150.9 feet. However, I wasn't through. My Prostaff 440 tends to shoot long by 1.0 feet. So to be absolutely conservative, I subtracted a foot off the hypotenuse shot to get (63.1)(3) -1 = 188.3 feet. My height calculation then became 188.3sin(44.2)+18.9 = 150.2. Ah, we can all sleep at night. Number 125 confirmed.
The pine is quite attractive, so I named it "Purty Pine". We southerners can't say "Pretty". Images are attached. Oh yes, Purty Pine's girth is a modest 8.6 feet (31.7 in in diameter), but straight as an arrow.
So, now there are 5 pines in the Rachel Carson Grove that reach 150 feet. All others are in the 130s and 140s. However, one is 149.2 feet. It has a good chance of being a 150 by August.