and I quote
0.5 MILE WEST ALONG STATE HIGHWAY FROM, ROUTT COUNTY, 75 FEET NORTH OF THE NORTHEAST CORNER OF RANCH HOUSE, AND 47 FEET SOUTH OF THE CENTERLINE OF THE HIGHWAY, NE FLANGE OF FIRE HYDRANT = 6703.87'
> and I quote
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> 0.5 MILE WEST ALONG STATE HIGHWAY FROM, ROUTT COUNTY, 75 FEET NORTH OF THE NORTHEAST CORNER OF RANCH HOUSE, AND 47 FEET SOUTH OF THE CENTERLINE OF THE HIGHWAY, NE FLANGE OF FIRE HYDRANT = 6703.87'
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I do not think I would trust that TBM until I could verify it from other sources. Especially with 3 flanges showing.
That's easy, go with whatever bolt on whatever flange has the most fluorescent paint on it.;-) I don't know how many state highways exit Routt County in a westerly direction, but that could be another source of ambiguity.
Have your lovely assistant look for an "x" in any of the 20 north facing nuts.
Then run to the next bench.
Rick
It sure does call for a level loop to be run to another BM.;-)
The description doesn't even mention a "bolt" does it?
Aside from the fact that that photo shows one of the major reasons one should never use a hydrant as a BM, no BM should be assumed correct until checked against at least one other BM.
In any event, the description should include the height above ground level, i.e., "the flange of a hydrant four feet above the level of the road shoulder....", or perhaps, "......the top flange of three...."
By the way, what does "the northeast flange" mean? Should it be "the northeast bolt"?
Does snow get that deep that the FH has to have that booster pipe attached to it?
100:1 any part of the flange, take your pick, would be within 0.01' of being level. Maybe the author of the description mean North Edge insted of North East.
What's wrong with your assistant's leg?
> What's wrong with your assistant's leg?
The photo was taken last summer, I was by myself doing recon without an assistant. This gal was a cyclist riding by at the time and I asked if she would stand next to the FH for perspective, she wanted to cover up, so I gave her a shirt of mine. The leg thing is a brace, I think
> and I quote
>
> 0.5 MILE WEST ALONG STATE HIGHWAY FROM, ROUTT COUNTY, 75 FEET NORTH OF THE NORTHEAST CORNER OF RANCH HOUSE, AND 47 FEET SOUTH OF THE CENTERLINE OF THE HIGHWAY, NE FLANGE OF FIRE HYDRANT = 6703.87'
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It's hilarious that everyone but Paul saw a girl and not a 5' fire hydrant!!!!!
You guys are some kind of dirty old men!!!!! 🙂
> It's hilarious that everyone but Paul saw a girl and not a 5' fire hydrant!!!!!
<---- Points to Nate
LOL! Bare skinned legs do seem to get attention!
FOR WHAT IT'S WORTH
I WAS TAUGHT, THAT IN THE CASE OF BENCHMARK AMBIGUITY, THE HIGHEST POSSIBLE POINT IS THE MARK.
DITTO THE DOUBLE CHECK.
SC, sometimes that is the only thing around to use. I always use the operating nut on top (but not the zirc). I try to pick it up during a topo/as-built survey. With some nice shiny coordinates on that thing, makes for a quicky BS in a pinch!
-JD-
I double checked the girl, and she still has a bandaged left leg.
(there's your double check!)
🙂
N
FOR WHAT IT'S WORTH
FH's can "surge" vertically, they do not make good BMs.
easy, just use your Garmin to figure out which one is closest to 6703.