The critical area is defined as follows:
A. All improvements, structures, construction work within three hundred feet (300') riverward and five hundred feet (500') landward of the levee centerline, including any work beneath the levee or walls regardless of depth;
B. All subsurface work within three hundred feet (300') riverward and one thousand feet (1,000') landward of the levee centerline, including excavations, ponds, swimming pools, trenches, drainage ditches, soil borings, invasive studies and investigations, wells, shafts, pile driving, drilling, mining, utility installations, sewer line installations, scours and other similar work, penetrations, or activities, including any subsurface work beneath the levee or walls regardless of depth;
C. All seismic surveys, demolitions using explosives and other similar equipment, work or activities within one thousand five hundred feet (1,500') riverward and one thousand five hundred feet (1,500') landward of the levee centerline;
The "critical area" is further defined as the area wherein any activities may occur that have the potential, either singularly or cumulatively, in any manner whatever, to impact or impair the flood protection project, its works, its operation or maintenance, directly or indirectly, including by gradual intrusion, during high, low and normal water events, or to impact or impair village of Milan or Big Island's water resources. This chapter is not intended to create an all inclusive list of activities or to create any distance limitation to any unforeseen potential impact or impairment that would be subject to review presently or in the future and that may be prohibited; and in some instances the critical area will be extended beyond the distances defined herein if any impact or impairment to the flood protection project, its works, its operation or maintenance or to Big Island's water resources is possible. (Ord. 1575, 1-7-2013)