Illinois General Assembly - Illinois Compiled Statutes

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615 ILCS 5/18f

(615 ILCS 5/18f) (from Ch. 19, par. 65f)

Sec. 18f.

(a) The Department of Natural Resources shall define 100-year floodplains 
within the State of Illinois on a township by township basis and may issue
permits for any construction within such 100-year floodplains on or after the
effective date of this amendatory Act of 1971.  The Department shall publish
and distribute suitable reports, together with mapping and hydrologic
exhibits pertaining to 100-year floodplains defined and established under this Act.
In defining applicable 100-year floodplains, the Department shall cooperate with,
and shall consider planning and zoning requirements of, regional planning
agencies created by statute, counties, municipalities and other units of
government.  A period of thirty days shall be allowed for any agency to
submit written comments to the Department regarding any proposed 100-year floodplain area.  If such agency fails to return comments to the Department
within the specified time period the Department may proceed with the
publication and institution of the 100-year floodplain permit procedure.  The
Department is charged with the planning, development, and evaluation of the
most economic combination of retention storage, channel improvement, and
floodplain preservation in defining and establishing 100-year floodplain areas.
All construction undertaken on a defined 100-year floodplain subsequent to the
effective date of this amendatory Act, without benefit of a permit from the
Department of Natural Resources, shall be unlawful and
the Department, may in its discretion, proceed to obtain injunctive relief for
abatement or removal of such unlawful construction.  The Department, in its
discretion, may make such investigations and conduct such hearings as may
be necessary to the performance of its duties under this amendatory Act of
1971.  Activity of the Department under this Section shall be limited to
townships related to projects of the Department authorized by the General
Assembly.  The report of the Department shall be considered a final
administrative decision and subject to judicial review in accordance with
the provision of the Administrative Review Law.

(b) For the purposes of this Section, including for the purposes of granting permit and license applications filed or pending prior to the effective date of this amendatory Act of the 96th General Assembly, "100-year floodplain" means the lowland and relatively flat areas adjoining inland and coastal waters, including flood-prone areas of offshore islands, that are inundated by a flood that has a 1% or greater chance of recurring in any given year or a flood of a magnitude equalled or exceeded once in 100 years on the average over a significantly long period. For the purposes of this Section, an area shall be deemed by operation of law not  to be within the 100-year floodplain if the area lies within an area protected by a federal levee and  is located in a flood prevention district established in accordance with  the Flood Prevention District Act; provided, however, that an area that lies within a flood prevention district established in accordance with the Flood Prevention District Act shall be deemed by operation of law to be within the 100-year floodplain if, according to the currently adopted federal flood insurance rate map, the area is subject to inundation by a 100-year flood from bodies of water other than the Mississippi River.

(Source: P.A. 96-1395, eff. 7-29-10.)