| (B) When regional systems are proposed, the board will require
the regional authority and the member entities to demonstrate compliance with
these rules.
(C) For the purposes of this subsection, the following definitions
will apply:
(i) Areas of existing development. All or part of the project
planning area which, at the time of the board's issuance of its environmental
determination, is:
(I) occupied by existing structures or facilities;
(II) substantially surrounded by existing structures and facilities
and which serves no significant independent natural floodplain function; or
(III) characterized by substantial investment in public infrastructure
(e.g., roads and utilities are available to individual users) but which is
only partially occupied by structures or facilities.
(ii) Floodplain or 100-year floodplain. Those lowland, relatively
flat areas usually adjoining inland or coastal waters that have a 1.0% or
greater chance of flooding in any given year. In determining these areas,
the applicant will use flood insurance rate maps or flood hazard boundary
maps approved by FEMA. Where these maps are unavailable, the applicant should
produce its own map(s) delineating the 100-year floodplain and showing 100-year
flood elevations. Such maps should be prepared in accordance with FEMA's Guidelines
and Specifications for Study Contractors.
(iii) Functions and values. Natural functions and values of
the floodplain include:
(I) maintenance of water quality;
(II) transport, storage, and absorption of floodwaters;
(III) groundwater recharge;
(IV) flow of debris;
(V) wildlife habitat;
(VI) cultural and historical resource repository;
(VII) agricultural resources; and
(VIII) aesthetic resources.
(D) The board will, as appropriate and consistent with the
requirements of these rules and Executive Order 11988, Floodplain Management,
require assurances or include conditions to the provision of CWSRF financial
assistance to insure compliance with these rules.
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