adding the backsight to the elevation of the B.M. or T.P. In Figure A. 5.1, the B.S. , 2. 40, is added to the ... Procedure for Differential Leveling Several procedures and precautions should be observed for accurate differential leveling. Refer toanbsp;...
|Title||:||Watercourse improvement manual|
|Author||:||Thomas James Trout, William Doral Kemper, United States. Agency for International Development, Colorado State University. Water Management Research Project|