Illinois Administrative Code › Title 17 - CONSERVATION › Part 3708 - FLOODWAY CONSTRUCTION IN NORTHEASTERN ILLINOIS › Section 3708.20 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
Unless specifically defined in this Section, words and phrases
				used in this Part shall be interpreted so as to give them the meaning they have
				in common usage.
"Act" - The Rivers, Lakes and Streams Act [615 ILCS 5 ].
"Application" - An application for a permit to authorize new
				construction in a regulatory floodway as required by this Part.
"Appropriate Use" - See Section
				3708.70.
"Building" - A structure that is principally above ground and
				is enclosed by walls and a roof. This term includes a gas or liquid storage
				tank, a manufactured home, or a prefabricated building. This term also includes
				recreational vehicles and travel trailers to be installed on a site for more
				than 180 days.
"Conditional Approval of a Regulatory Floodway Map Change" -
				Preconstruction approval by the Department and FEMA of a proposed change to the
				floodway map. This preconstruction approval, pursuant to this Part, gives
				assurances to the property owner that once an appropriate use is constructed
				according to permitted plans, the floodway map can be changed, as previously
				agreed, upon review and acceptance of as-built plans. The Department will
				accept as-built plans which show the project was built in accordance with the
				permitted plans.
"Department" - The Illinois Department of Natural
				Resources.
"FEMA" - Federal Emergency Management Agency and its
				regulations at 44 CFR 65 effective as of October 1, 1988. This incorporation
				does not include any later editions or amendments.
"Flood Fringe" - That portion of the flood plain outside the
				regulatory floodway.
"Flood Plain" - That land adjacent to a body of water with
				ground surface elevations at or below the 100-year frequency flood
				elevation.
"Hydraulically Significant" - The length of a hydraulically
				significant portion of a watershed is determined by three factors; the drainage
				area of the watershed, the amount of flood plain storage in the regulatory
				floodway of the stream, and the impact flood plain storage has on reducing
				downstream flood heights. For example, on a stream with a small drainage area,
				with little flood plain storage, and little downstream impact, only one
				municipality may have to require effective compensatory storage. On larger
				streams, several communities may be involved.
"New Construction" - The construction of any new building or
				structure or the placement of any fill, material, or structure or regrading but
				does not include the repair, remodeling, or maintenance of buildings or
				structures in existence on November 18, 1987 (Section 18g of the Act).
"Office" - The Illinois Department of Natural Resources, Office
				of Water Resources.
"Public Flood Control Project" - A flood control project which
				will be operated and maintained by a public agency to reduce flood damages to
				existing buildings and structures which includes a hydrologic and hydraulic
				study of the existing and proposed conditions of the watershed. Nothing in this
				definition or this Part shall preclude the design, engineering, construction or
				financing, in whole or in part, of a flood control project under this Part by
				persons or parties who are not public agencies.
"Registered Land Surveyor" - A land surveyor registered in the
				State of Illinois, under the Illinois Professional Land Surveyor Act [225 ILCS
				330 ].
"Registered Professional Engineer" - An engineer registered in
				the State of Illinois, under the Illinois Professional Engineering Practice Act
				[225 ILCS 325 ].
"Regulatory Floodway" - The channel and that portion of the
				floodplain adjacent to a stream or watercourse as designated by the Department
				pursuant to Section 18g of the Act, which is needed to store and convey
				the100-year frequency flood discharge with no more than a 0.1 foot increase in
				stage due to the loss of flood conveyance or storage, and no more than a 10%
				increase in velocities (Section 18g of the Act).
"Repair, Remodeling or Maintenance" - Construction activities
				which do not result in any increases in the outside dimensions of a building or
				any changes to the dimensions of a structure.
"Structure" - The results of a man-made change to the land
				constructed on or below the ground, including the construction, reconstruction
				or placement of a building or any addition to a building; installing a
				manufactured home on a site, preparing a site for a manufactured home or
				installing a travel trailer on a site for more than 180 days; installing
				utilities, construction of roads or similar projects; construction or erection
				of levees, walls, fences, bridges or culverts; drilling, mining, filling,
				dredging, grading, excavating; and the storage of materials.
"Transition Sections" - are reaches of the stream or floodplain
				where water flows from a narrow cross-section to a wide cross-section or vice
				versa.