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  1. Kendalljazz

    Need Help Calculating HGL/EGL of storm drain system by hand

    I designed storm drain system in civil 3d and I want to calculate hgl and egl by hand. Does anyone have a good resource I can read our watch that goes step by step on how to calculate these by hand. I am still insure about how standard step method works, and why we need it to calculate hgl.

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