NAC408.523. Drainage of adjacent wetlands onto state highway prohibited; requirements for drainage systems; submission of plan for drainage.

     1. The installation of a privately owned line or conduit on a state highway or within the right-of-way of a state highway to drain adjacent wetlands onto the highway or right-of-way is prohibited.

     2. A person who develops property adjacent to an area for the drainage of a highway shall ensure that the existing flow patterns are continued. Any proposed change to a drainage system by an adjoining developer must be supported by calculations for drainage.

     3. A plan for drainage and the calculations relating to the runoff of water must be submitted to the Department for any development or construction which affects the right-of-way for the highway. The plan must include calculations for peak runoff for existing and proposed developments if the use of the land is substantially altered. Each drainage system must be constructed pursuant to the requirements set forth in the operating permit.

     4. The Department may authorize an improvement of its drainage structures to provide for increased flows if there is no adverse effect on any property located downstream.

     (Added to NAC by Dep’t of Transportation, eff. 1-6-95; A by R135-98, 10-3-2000)