To answer
@CoasterAuditor and others I have a rough estimate of the height of the higher of the two balloons.
I first alerted
@Zachary to the survey on my drive to the park when I saw the balloon from next to the shell station.
Visually, it appeared roughly equal in height to the top of Griffin from there. So, I did some trigonometry using maps to figure out the distances to griffin and the approx fhp location. I even used a GIS map to factor in elevation.
The shell station is at about 103 ft, Griffin at 87, and fhp 83.
Here's my drawing that I used for the trig:
View attachment 26617
260 ft adding in the elevation.
Then I looked closer at the picture and decided it was slightly above Griffin, so I punched in a slightly larger estimate and got an upper bound of 275 feet.
And then I was reminded we had another data point:
View attachment 26618
This calculation was within the same range as my other maths. So I can confidently say that when I took the photo the balloon was between 265/275 ft.
That said; as
@Zachary pointed out there is a potential wind factor and I also have no clue if they were actively raising the balloon at the time.
I took some additional photos that didn't make the article that I can also share later. I took a lot for triangulation purposes.