(A) Drainage ditches established parallel to the roadway as an integral part of the road shall be of the capacity to safely convey the 10-year design storm runoff assuming a fully developed watershed. The bar ditch shall be configured with safe/traversable slopes if located within the roadway clear zone. The ditch shall be such that it does not result in roadway sub-grade damage from drainage infiltration. Bar ditches shall be designed so the channel stability of the bar ditch is not significantly diminished as a result of 1 or more 10-year design storm runoff events.
(B) Culverts may be used for crossing bar ditch or roadway drainage ditches. No filling or blocking of drainage ditches shall be allowed; not even on a temporary basis. When culverts are used to access private property from public roadways, a culvert permit issued by the City Engineer shall be required and the expense of the culvert installation shall be borne by the lot or property owner. When applying for a culvert permit, the private property owner shall consider and submit the following information:
(1) The culvert shall have no affect on the drainage ditch to perform its designed function and as such the culvert shall meet the criteria established in § 154.21
(A) above;
(2) The type and size of the culvert material;
(3) Erosion and slope stability control measures to be used at the inlet and outlet ends of the culvert;
(4) Length of culvert crossing to permit access of maintenance and emergency vehicles on to the property; and
(5) Maintenance plan for maintaining the integrity of the culvert by the owner.
(Ord. 77, passed 1-5-2005)