Ok, yes that manual is from 2001 and was superseded three years ago. The latest is the 3rd Edition from 2009.
Major Changes in 3rd Edition 2009:
"Page 7-16 – Section 188.8.131.52 has been totally revised to reflect a new methodology for calculating energy losses in access holes."
Page 7-34 – Section 7.5, the energy gradeline computational procedure has been completely changed to reflect the new energy loss methodology.
So for junction losses, are they using correction factors for diameter, flow depth, relative flow, plunging flow and benching from the Second Edition 2001? Or the Approximate Method which was only meant to be used for preliminary design, not to be used for final design?
Ernst Engineering Fred Ernst, PE C3D 2014 SP1 W7x64; i7 8gb; Radeon HD 5700 www.ernstengineering.com