Which U.S. monument has a smaller replica hidden in a nearby manhole? – Answer the following Which U.S. monument has a smaller replica hidden in a nearby manhole? Correctly and Stand a chance to win Amazing Prizes Every Day.
Get the right Answer to the Which U.S. monument has a smaller replica hidden in a nearby manhole? that you are looking for. In this article, you can find the right answer and Stand a chance to win awesome prizes in Amazon Quiz.
Which U.S. monument has a smaller replica hidden in a nearby manhole?
Answer – Washington Monument – “Bench Mark A” is a 12-foot replica of the Washington Monument replica that was built in a manhole near the true monument. Surveyors use the secondary “mini-monument” as a Geodetic Control Point. Geodetic Control Points are a network of points around the nation that enable the National Geodetic Survey (NGS) to integrate all government maps. There are about a million such points across the U.S., most of which are metal rods or other stable unmovable objects. This particular control point was built to mirror its famous neighbor and has been used by surveyors since the 1880s. At first, the mini-monument was above ground but was later wrapped in a brick chimney and buried. It allows surveyors to measure things like earthquakes and, for instance, how deep the actual Washington Monument has sunk into the soil (6.2 centimeters over the past century).:
Conclusion
I hope found the right Answer to Which U.S. monument has a smaller replica hidden in a nearby manhole?. If you have any doubts, please let me know in the comments section right below.
| EliteAnswers Home | Click Here |