"even though the full length was clearly visible. "

was it (would it be) visible while surveying locations where you mapped it?

Also at say https://www.openstreetmap.org/?mlat=30.26474&mlon=-97.74119#map=19/30.26474/-97.74119 location?

( http://nrenner.github.io/achavi/?changeset=145172620 )