Solution # 2 from this website.

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Can you please reveiw the attached vignette?

This the Soultion # 2 from this website -

Program 2
Corresponding file is B3tut2W1_02.dwg
Design drainage for a roadway.
Regrade the site to provide positive drainage to the sides.
Maximum slope for all elements (swale, roadway and site re-grading) is 8%.

Thanks in advance.