This monument was placed by the United States General Land Office in 1948 during a survey of the islands in the Wisconsin River near its confluence with the Mississippi River. It is located along the …
Is the Washington Monument sinking? It's a question scientists are trying to answer, and their height survey could have a widespread impact on the District. http://wj.la/1gttobQ
Added by ⚡Survenator⌁ at 5:13pm on December 9, 2013
Does anybody have any idea on how much frost affects monumentation? I have always wondered how much an iron pin or concrete monument could move based on frost. I survey in Connecticut, where the cod…