With the monuments i found and establishing the tangents the CA and radius worked well with monuments on both sides of the street. I think this is one of the earliest plat in our area that i've seen a curve table on a plat, and its interesting for sure. Thanks for the comments.
I tried to check the given data against itself tonight, and mostly succeeded.
115-116: that hard-to-read length is 334.0, not 353.0
16-16: radius bearing is given as SW but would need to be NE to match the others.
17-18 and 117-118 don't check so well; I get chords several tenths longer. (I read that hard-to-read chord as 99.2 but compute 99.5)
3a-4 and 103a-104 are really confusing. First off, you can't have both chords as 57.7, with different radii, and have the same radius bearing. The radius bearing and chord bearing suggest they might really be 3-3a and 103-3a instead, with chord lengths 57.7 and 69.7 instead.
How does that match up to what you found?
and magically i was working on the 117-118 curve
> Which items do you hold when you see this. It looks like everything was computed?
Not everything was computed, something was used as design data for a starting point and then the rest was computed. It's your job to figure out what the design data was.;-)