AZcachemeister Posted March 20, 2010 Share Posted March 20, 2010 On a recent run down on the Barry Goldwater Bombing range, southpawaz and I recovered several 'driven rod' type marks monumented in 1962. All of them were a disk attached to a copper-coated rod driven to 9 or more feet, encased in a concrete tile. Most of the more 'modern' marks of this type mention 'driven to refusal', which is determined by the rate the rod is penetrating while being driven. None of the marks found (on this run) have any reference to refusal. We wondered when the first mark of this type might have been monumented, so I'm throwing the question out here. Quote Link to comment
Bill93 Posted March 20, 2010 Share Posted March 20, 2010 (edited) Google search for Small "driven rod" benchmark finds an abstract for a 1929 paper by James B. Small of US C&GS, "Settlement studies by means of precision Leveling", given 1939 at this Link. The Google entry includes the phrase "Another section is coupled to the driven rod and the gasoline hammer ..." which sounds like what we are after. Without buying the article, I can't tell much more about it, nor be sure it isn't coupled with a later work from which the phrase comes. They certainly were not common in this area before the 1960's. Edited March 20, 2010 by Bill93 Quote Link to comment
kayakbird Posted March 22, 2010 Share Posted March 22, 2010 RU0304 was set in Treasure County, Mont in 1958. MEL Quote Link to comment
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