Earthen channel side slopes shall be no steeper than 3 horizontal to 1 vertical. Flatter slopes may be required to prevent erosion and for ease of maintenance. Where channels will be lined, side slopes shall be no steeper than 1-1/2 to 1 with adequate provisions made for weepholes. Side slopes steeper than 1-1/2 to 1 may be used for lined channels provided that the side lining is designed and constructed as a structural retaining wall.
(Ord. 1999-05, passed 6-8-99)