This is among the better 45th parallel markers in that it also offers the simultaneous thrill of being on a meridian of some importance as well. 90 degree west is halfway to being halfway around the globe from the traditional line running through Greenwich England - John G's petition to the USGS dates from 1969, fully four years before the arbitrary IERS line became the accepted reference, changing its official title several times before settling on WGS84 eleven years later.
the park itself has undergone some renovation which added a fancy four-points mount for the original survey button, 1000 feet of gravel pathway along and through a field corn cornfield, and some benches for the less vigorous travelers.
for being in the middle of every thing it sure is a long way from any thing... roughly 1000 miles from the house so I took advantage of the four day weekend for this and a half dozen side trips. read more