BALDY had some historical significance, as it was one of 13 principal triangulation stations in Arizona used by the USC&GS to observe the Texas-California Arc of Primary Triangulation, which was the first major triangulation surveying performed in Arizona. BALDY had been set by the USGS previously, and was occupied by the C&GS for observations on October 16 and 17, 1910. The other principal stations observed from BALDY were CZ1860 CATALINA (Mount Lemmon), CY1235 GRAHAM (Mt. Graham), CF0328 CHIRICAHUA (Flys Peak), DA1442 TABLE (Table Top Mountain), and DU2086 SUPERSTITION (122.5 miles (!) NNW near Apache Junction). BALDY was also used to observe several points to the south, which allowed the C&GS to tie in to previously performed surveys of the international border.
I searched today not for the station itself, which was destroyed when the Lookout Cabin built on its location, but for the original reference mark, a chiseled cross. I had calculated coordinates for it of 31° 41.775' N, 110° 50.877' W, roughly 60 feet northeast of the Lookout foundation. There I was able to spot first some chiseled lettering on the side of a rock, with an arrow pointing towards the top. Closer examination of the lettering revealed "RP" (reference point), and below that, "USGS" (the first S is backwards). And above the point of the arrow on the top of the rock, the rough chiseled cross!
[This entry was edited by southpawaz on Saturday, November 28, 2009 at 1:51:56 PM.]
[Photos:]CG1052 BALDY RM chiseled cross
CG1052 BALDY RM Chiseled lettering RP USGS
CG1052 BALDY RM chiseled lettering and arrow
pointing to cross on top of the rock
CG1052 BALDY RM view SW to Lookout foundation