For the purpose of promoting the public health, safety, convenience and welfare, this chapter has been established to:
(a) Further the maintenance of safe and healthful conditions and prevent and control water pollution through:
(1) Limiting structures to those areas where soil and geological conditions will provide a safe foundation.
(2) Establishing minimum lot sizes to provide adequate area for private sewage disposal facilities.
(3) Controlling filling and grading to prevent serious soil erosion problems.
(b) Protect spawning grounds, fish and aquatic life through:
(1) Preserving wetlands and other fish and aquatic habitat.
(2) Regulating pollution sources.
(3) Controlling shoreline alterations, dredging and lagooning.
(c) Control building sites, placement of structures and land uses through:
(1) Separating conflicting land uses.
(2) Prohibiting certain uses detrimental to the shoreland area.
(3) Setting minimum lot sizes and widths.
(4) Regulating side yards and building setbacks from waterways.
(5) Allow only limited lifetime expansion to non-conforming structures.
(d) Preserve shore cover and natural beauty through:
(1) Restricting the removal of natural shoreland cover.
(2) Preventing shoreline encroachment by structures.
(3) Controlling shoreland excavation and other earth moving activities.
(4) Regulating the use and placement of boathouses and other structures.