"Conveyance system" means a constructed system of drainage facilities which collects, contains and conducts the flow of stormwater runoff. The elements of a conveyance system include, but are not limited to, gutters, ditches, pipes, constructed open channels and detention facilities. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Ord. 15-103, Jan. 11, 2016, Eff date Jan. 22, 2016).