§ 18.5-9. Design standards for drainage.

(a)

Existing drainage facilities. No person shall alter any natural drainage course or existing drainage facility in such a way as to damage or endanger by flooding, erosion, nuisance water or any other means, any public or private property or improvements. This includes altering surface sheet flow by the erection of fences, berms, curbs, or any other excavation, fill or structure, if such alteration will increase flow in any existing drainage course or facility without specific approval of the city engineer.

(b)

Disposal. All drainage facilities shall be designed to carry surface waters to the nearest practical street, storm drain, or natural watercourse approved by the city engineer and any other governmental agency having jurisdiction, as a safe place to deposit such waters, except as provided for in section 18.5-10, onsite retention.

(c)

Erosion prevention. Adequate provision shall be made to prevent precipitation, surface waters or wind from damaging the face of an excavation or fill. In order to retain a natural appearance, landscaping should be used for erosion protection of finished slopes wherever possible.

(d)

Terrace drains. All swales or ditches on drainage terraces shall be graded to provide suitable drainage and designed to prevent erosion and provide durability.

(e)

Nuisance water. The creation of nuisance water should be avoided whenever possible and shall be addressed in a manner which will mitigate or minimize any negative impact(s).

(Ord. No. 1701, § 1, 10-29-91)