Dale HillAug 29, 20219 minJoshua Tree SMASHRoad Trip to Joshua Tree National Park! I built this entire trip around finding a single, hexagonal Gravity Station Survey Mark. Job Done!
Dale HillMay 1, 202110 minTowers and Telescopes SoCal Six-Pack of Peaks 2021 Peak #9! A great day recovering survey marks on Mt. Wilson and learning about Nobel Scientist Albert Michelson.