The storm drainage master plan prepared by Stahley and Wright-McLaughlin Engineers and dated April 9, 1980, as well as the application updates of the Davis Gulch Basin dated May 1985, prepared by Robert Peccia and Associates, and the updates of the Last Chance Gulch Basin, Bull Run Basin and West Area Basin prepared by Stahley Engineering and Associates, dated May 1989, are hereby adopted by reference and declared to be part of this chapter. The plans are on file in the office of the city engineer. The city may adopt additional master drainage plan updates by reference and declare them to be a part of this chapter, and copies of such master drainage plan updates shall be on file in the office of the city engineer. Modifications of the plans may be initiated by the department and submitted to the city commission for approval. Approved modifications are to be filed in the office of the city engineer. (Ord. 3120, 12-21-2009)