In areas within Zones A1-30 and AE on the community’s FIRM with a base flood elevation (BFE) but where no regulatory floodway has been designated, new construction, substantial improvements, or other development, including fill, shall be prohibited, unless it is demonstrated that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the BFE more than one foot at any point within the community. (Ord. 2027 § 1, 2018)