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The elevation of the invert at Manhole 1 is 74.625'. The upward grade of the sewer is 1%. We wish to set a nail
The elevation of the invert at Manhole 1 is 74.625'. The upward grade of the sewer is 1%. We wish to set a nail on a batter board 8 feet above the invert at Station 2+00. The back- sight at BMI whose elevation is 83.500 is 5.600. The foresight reading needed to set the nail 8 feet above the invert at Sta 2+00 is most nearly A. 4.100 B. 4.225 C. 4.350 D. 4.475
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Elementary Surveying An Introduction to Geomatics
Authors: Charles D. Ghilani, Paul R. Wolf
13th Edition
978-0132554343, 132554348, 978-0273751441
