As used in this Part 1, the following terms shall have the meanings indicated:
ADEQUATE DOWNSTREAM STORMWATER CAPACITY
A stormwater management facility shall be considered to have adequate downstream stormwater capacity if the facility can be shown to accommodate up to and including the one-hundred-year stormwater runoff without increasing property damage to the adjacent property or to a point downstream known to the enforcement officer to be a restriction causing significant backwater.
APPLICANT
Any person, firm, or governmental agency who or which owns property, or the duly appointed representative, and wishes to develop that property and one who executes the necessary forms to procure a permit to carry out such development.
APPROPRIATE USE
Permissible development within the regulated floodway that will be considered for permit issuance.
BASE FLOOD ELEVATION (BFE)
The elevation delineating the level of flooding resulting from the one-hundred-year flood frequency elevation.
BASIN PLAN
A study and evaluation of an individual drainage basin's stormwater management and flood control needs.
BUFFER
An area of predominantly vegetated land to be left open, adjacent to drainageways, wetland, lakes, ponds or other surface waters for the purpose of eliminating or minimizing adverse impacts to such areas.
BUILDING
An enclosed or partially enclosed structure that is principally above ground. The term includes a gas or liquid storage tank, a manufactured home, mobile home or a prefabricated building. This term also includes recreational vehicles and recreational vehicles left on a site for more than 180 days.
CHANNEL
A natural or artificial watercourse of perceptible extent which periodically or continuously contains moving water, or which forms a connection link between two bodies of water. It has a definite bed and banks which serve to confine the water.
CHANNEL MODIFICATION
Alteration of a channel by changing the physical dimensions or materials of its bed or banks. Channel modification includes damming, rip-rapping or other armoring, widening, deepening, straightening, relocating, lining, and significant removal of bottom or woody vegetation. Channel modification does not includes the clearing of dead or dying vegetation, debris, or trash from the channel. Channelization is a severe form of channel modification typically involving relocation of the existing channel (e.g., straightening).
COMPENSATORY STORAGE
An excavated, hydraulically equivalent volume of storage used to offset the loss of natural flood storage capacity when artificial fill or structures are placed within a floodplain.
CONDITIONAL APPROVAL REGULATORY FLOODWAY MAP CHANGE
Preconstruction approval by IDOT/DWR and the Federal Emergency Management Agency of a proposed change to the floodway map. This preconstruction approval, pursuant to this Part 1, 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.
CONDITIONAL LETTER OF MAP REVISION (CLOMR)
A letter which indicates that the Federal Emergency Management Agency will revise base flood elevations, flood insurance rate zones, flood boundaries, or floodway as shown on an effective Flood Hazard Boundary Map or Flood Insurance Rate Map, once the as-built plans are submitted and approved.
CONTROL STRUCTURE
A structure designed to control the rate of flow that passes through the structure, given a specific upstream and downstream water surface elevation.
DAM
All obstructions, wall embankments, or barriers, together with their abutments and appurtenant works, if any, constructed for the purpose of storing or diverting water or creating a pool. Underground water storage tanks are not included.
DAMAGE
A measurable rise in flood heights on buildings currently subject to flooding, or flooding of buildings currently not subject to flooding, or increases in volume or velocity to the point where the rate of land lost to erosion and scour is substantially increased.
DEPRESSIONAL STORAGE AREAS
Nonriverine depressions in the earth where stormwater collects.
DESIGN STORM
A selected storm event, described in terms of the probability of occurring once within a given number of years, for which stormwater or flood control improvements are designed and built.
DETENTION FACILITY
A man-made structure for the temporary storage of stormwater runoff with controlled release during or immediately following a storm.
DEVELOPMENT
A. 
Finalization of a plat, a replat, a lot split, or any man-made change to real estate by private or public agencies, including:
(1) 
Construction, reconstruction, repair, or placement of a building or any addition to a building; or
(2) 
Installation of a manufactured home on a site, preparation of a site for a manufactured home, or the placement of a recreational vehicle on a site for more than 180 days; or
(3) 
Drilling, mining, installation of utilities, construction of roads, bridges, or similar projects; or
(4) 
Clearing of land as an adjunct of construction; or
(5) 
Construction or erection of levees, walls, fences, dams, or culverts; channel modification; filling, dredging, grading, excavating, paving, or other alterations of the ground surface; storage of materials; or deposit of solid or liquid waste; or
(6) 
Any other activity that might change the direction, height, volume, or velocity of floodwater or surface water, including the drainage of wetlands and removal of vegetation to the extent such that the wetland would no longer meet the criteria of supporting hydrophytic vegetation as defined in this Part 1 except that which would be considered appropriate for management purposes.
B. 
Development does not include repair, remodeling, or maintenance of existing buildings and facilities or gardening, plowing, and similar agricultural practices that do not involve filling, grading, or construction of levees; nor does development include agricultural practices outside of the floodplain involving filling or grading as part of an SCS-designed and approved conservation project (i.e., terraces, grass waterways). Additionally, development does not include fence installation, pole placement, drilling, or other minor auxiliary construction activity which does not affect stormwater runoff rates or volumes as long as the development activity is not located in a floodplain, wetland, or watercourse.
DIRECT DISCHARGE
Discharges of stormwater which have not passed through a detention or retention facility designed to the specification of this Part 1.
DRAINAGE AREA
The land area above a given point that contributes stormwater to that point.
DRY DETENTION FACILITY
A detention facility designed to drain completely after temporary storage of stormwater flows and to normally be dry over the majority of its bottom area.
ELEVATION CERTIFICATES
A form published by the Federal Emergency Management Agency that is used to certify the elevation to which a building has been elevated.
ENFORCEMENT OFFICER
The Village Engineer or his or her authorized designee.
EROSION
The process whereby soil is removed by flowing water or wave action.
EXCEPTIONAL FUNCTIONAL VALUE WETLAND
Any wetland identified as such in the USEPA Advanced Identification Study of Lake County (ADID) or any wetland that through a functional assessment meets the criteria defined in that study for determining exceptional functional value.
FEE IN LIEU OF ON-SITE DETENTION
A fee assessed to a permit applicant used to contribute to the cost of the capital improvement component of basin plans such as regional detention sites or improvements to downstream conveyances, in lieu of constructing on-site detention.
FEMA
The Federal Emergency Management Agency and its regulations.
FLOOD
A general and temporary condition of partial or complete inundation of normally dry land areas from overflow of inland or tidal waves, or the unusual and rapid accumulation of runoff of surface waters from any source.
FLOOD CONVEYANCE PATH
The channel, including on-stream lakes, and that portion of the floodplain adjacent to a stream or watercourse which is needed to convey the existing and anticipated future one-hundred-year-frequency flood discharge with no more than a 0.1 foot increase in stage.
FLOOD FREQUENCY
A period of years, based on a statistical analysis, during which a flood of a stated magnitude may be expected to be equaled or exceeded.
FLOOD INSURANCE RATE MAP (FIRM)
A map prepared by the Federal Emergency Management Agency or HUD that depicts the special flood hazard area (SFHA) within a community. This map includes insurance rate zones and floodplains and may or may not depict floodways.
FLOOD PROTECTION ELEVATION (FPE)
The elevation of the base flood or one-hundred-year-frequency flood plus two feet of freeboard at any given location in the special flood hazard area (SFHA).
FLOODPLAIN (REGULATORY)
Floodplains may be either riverine or nonriverine depressional areas. Riverine floodplains are those areas contiguous to a lake, pond, or stream whose elevation is greater than the normal water pool elevation but equal to or lower than the projected one-hundred-year flood elevation. Nonriverine floodplains are depressional storage areas not associated with a stream system which surrounding lands drain causing periodic inundation by stormwaters. In certain cases, the floodplain may also be known as the "special flood hazard area" (SFHA). A regulatory floodplain exists along any watercourse draining 100 acres or more or any nonriverine areas with a surface area greater than 1/4 acre for the one-hundred-year event.
FLOODPLAIN MANAGEMENT
An overall program of corrective and preventive measures for avoiding or reducing future flood damage.
FLOODPROOFING
Any combination of structural and nonstructural additions, changes, or adjustments to structures or property which reduce or eliminate flood damage to real estate or improved real property, water and sanitary facilities, structures, and their contents.
FLOODPROOFING CERTIFICATE
A form published by the Federal Emergency Management Agency that is used to certify that a building has been designed and constructed to be structurally dry floodproofed to the flood protection elevation.
FLOODWAY (REGULATORY)
The channel, including on-stream lakes, and that portion of the floodplain adjacent to a stream or watercourse as designated by the Illinois Department of Transportation, Division of Water Resources, which is needed to store and convey the existing and anticipated future one-hundred-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.
FREEBOARD
An increment of height added to the base flood elevation to provide a factor of safety for uncertainties in calculations, unknown local conditions, wave actions, and unpredictable effects such as those caused by ice or debris jams.
FUNCTIONAL ASSESSMENT
An assessment of a wetlands flood storage, water quality, and other beneficial functions.
HISTORIC STRUCTURE
Any structure that is:
A. 
Listed individually in the National Register of Historic Places or preliminarily determined by the Secretary of the Interior as meeting the requirements for individual listing on the National Register; or
B. 
Certified or preliminarily determined by the Secretary of the Interior as contributing to the historic district or a district preliminarily determined by the Secretary to qualify as a registered historic district; or
C. 
Individually listed on the state inventory of historic places by the Illinois Historic Preservation Agency; or
D. 
Individually listed on a local inventory of historic places that has been certified by the Illinois Historic Preservation Agency.
HYDRAULICALLY EQUIVALENT COMPENSATORY STORAGE
Compensatory storage placed between the proposed normal water elevation and the proposed one-hundred-year flood elevation. All storage lost below the existing ten-year flood elevation is replaced below the proposed ten-year flood elevation. All storage lost above the existing ten-year flood elevation is replaced above the proposed ten-year flood elevation.
HYDRIC SOIL
A soil that is saturated, flooded, or ponded long enough during the growing season to develop anaerobic conditions in the upper part.
HYDROLOGICALLY DISTURBED
An area where the land surface has been modified to increase runoff, volumes, rates, or direction.
HYDROPHYTIC VEGETATION
Plant life growing in water or soil or on a substrate that is at least periodically deficient in oxygen as a result of excessive water content.
IDOT/DWR
The Illinois Department of Transportation, Division of Water Resources.
IMPERVIOUS SURFACE
Any hard-surfaced, man-made area that does not readily absorb or retain water, including but not limited to building roofs, parking and driveway areas, graveled areas, sidewalks, and paved recreation areas.
LAKE
A natural or artificial body of water encompassing an area of two or more acres which retains water throughout the year.
LETTER OF MAP AMENDMENT (LOMA)
An official determination by FEMA that a specific structure is not in a one-hundred-year flood zone. A LOMA amends the effective Flood Hazard Boundary Map (FHBM) or Flood Insurance Rate Map (FIRM).
LETTER OF MAP REVISION (LOMR)
A letter that revises base flood or one-hundred-year frequency flood elevations, flood insurance rate zones, flood boundaries, or floodways as shown on an effective FHBM or FIRM.
MANUFACTURED HOME
A structure, transportable in one or more sections, which is built on a permanent chassis and is designed for use with or without a permanent foundation when connected to the required utilities. The term "manufactured home" also includes park trailers, recreational vehicles and other similar vehicles installed on site for more than 180 consecutive days.
MANUFACTURED HOME PARK OR SUBDIVISION
A parcel (or contiguous parcels) of land divided into two or more manufactured home lots for rent or sale.
MITIGATION
Measures taken to eliminate or minimize damage from development activities, such as construction in wetlands or floodplain filling, by replacement of the resource, or by other means of compensation.
NATURAL
When used in reference to streams and channels, those streams and channels formed by the existing surface topography of the earth prior to changes made by man. A modified stream and channel which has regained natural characteristics over time as it meanders and reestablishes vegetation may be considered natural.
NGVD
National Geodetic Vertical Datum of 1929.
NONRIVERINE FLOODPLAIN
Floodplains not associated with streams, creeks, or rivers, such as isolated depressional storage areas.
ORDINANCE
Any Village of Bannockburn ordinance approving these regulations or any amendments hereto.
ORDINARY HIGH WATER MARK
The point on the bank or shore at which the presence and movement of surface waters are continuous so as to leave a distinctive mark, such as by erosion, destruction, or prevention of terrestrial vegetation, predominance of aquatic vegetation, or other such recognized characteristics.
OWNERSHIP PARCEL
Any legally described parcel of land. This includes contiguous lots or parcels of land owned by the same property owner.
PARCEL IDENTIFICATION NUMBER
A permanent index number used to identify properties for tax assessment.
POND
A natural or artificial body of water of less than two acres which retains water year round.
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, structures, and property. The project includes a hydrologic and hydraulic study of the existing and proposed conditions of the watershed. Nothing in this definition shall preclude the design, engineering, construction, or financing, in whole or in part, of a flood control project by persons or parties who are not public agencies.
PUBLIC ROAD DEVELOPMENT
Any development activity which takes place in a highway right-of-way or part thereof that is administered and funded by a public agency under its respective highway jurisdiction. Rehabilitative maintenance and in-kind replacement are not considered to be a public road development and do not require a permit, unless located in a regulatory floodway.
RECONSTRUCTION
The act of rebuilding a structure.
REGISTERED PROFESSIONAL ENGINEER
An engineer registered in the State of Illinois, under the Professional Engineer Practice Act of 1989 (225 ILCS 325/1 et seq.).
REGULATORY FLOODPLAIN
See "floodplain (regulatory)."
REGULATORY FLOODWAY
See "floodway (regulatory)."
REPAIR, REMODELING, OR MAINTENANCE
Activities which do not result in any increases in the outside dimensions of a building or any changes to the dimensions of a structure.
RETENTION FACILITY
A facility designed to completely retain a specified amount of stormwater runoff without release except by means of evaporation, infiltration, or pumping.
RIVERINE
Relating to, formed by, or resembling a stream (including creeks and rivers).
SEDIMENTATION
The processes that deposit soils, debris, and other materials either on other ground surfaces or in bodies of water or watercourses.
SITE DEVELOPMENT PERMIT
A permit established by this Part 1 and issued prior to the approval of a building permit signifying approval of procedures identified for stormwater control, floodplain development, wetlands development and mitigation, and water quality protection.
SMC DIRECTOR
The administrative head of the staff of the Lake County Stormwater Management Commission.
SPECIAL FLOOD HAZARD AREA (SFHA)
Any base flood area subject to flooding from a river, creek, stream, or any other identified channel or ponding and shown on a Flood Hazard Boundary Map or Flood Insurance Rate Map as Zone A, AO, A1-30, AE, A99, AH, VO, V30, VE, V, M, or E.
STORMWATER MANAGEMENT
A set of actions taken to control stormwater runoff with the objectives of providing controlled surface drainage, flood control, and pollutant reduction in runoff.
STORMWATER MANAGEMENT COMMISSION (SMC)
The Lake County Stormwater Management Commission established and existing under 55 ILCS 5/5-1062 for the purposes of developing, revising, and implementing a county-wide stormwater management plan.
STORMWATER MANAGEMENT SYSTEM
The collection of natural features and man-made facilities which define the stormwater management for a development.
STREAM
A course of running water flowing in a channel (including creeks and rivers).
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 recreational vehicle on a site for more than 180 days.
SUBSTANTIAL IMPROVEMENT
Any repair, reconstruction, or improvement of a structure, the cost of which equals or exceeds 50% of the market value of the structure either a) before the improvements of repair is started, or b) if the structure has been damaged and is being restored, before the damage occurred. For the purposes of this definition, "substantial improvement" is considered to occur when the first alteration of any wall, ceiling, floor or other structural part of the building commences, whether or not that alteration affects the external dimensions of the structure. The term does not, however, include either 1) any project for improvement of a structure to comply with existing state or local health, sanitary, or safety code specifications which are solely necessary to assure safe living conditions or 2) any alteration of a structure listed on the National Register of Historic Places or a state inventory of historic places.
TRANSITION SECTION
Reaches of the stream or floodway where water flows from a narrow cross-section to a wide cross-section or vice-versa.
WATER-DEPENDENT
Structures or facilities relating to the use of, or requiring access to, the water or shoreline. Examples of water-dependent uses include but are not limited to pumping facilities, wastewater treatment facilities, and facilities and improvements related to recreational boating or commercial shipping.
WATERCOURSE
Any natural or man-made depression into which water flows either regularly or intermittently, draining an area of 20 acres or more.
WATERSHED
The land area above a given point on a watercourse that contributes stormwater to that point. In Lake County, the four major watersheds are officially defined as the Lake Michigan Watershed, the North Branch of the Chicago River Watershed, the Des Plaines River Watershed, and the Fox River Watershed.
WET DETENTION FACILITY
A wet detention facility designed to maintain a permanent pool of water after the temporary storage of stormwater runoff.
WETLAND
Land that is inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, under normal conditions, a prevalence of vegetation adapted for life in saturated soil conditions (known as "hydrophytic vegetation"). A wetland is identified based upon the three attributes: 1) hydrology, 2) soils, and 3) vegetation as mandated by the current federal wetland determination methodology.
A. 
To aid in determining the presence or absence of wetlands, the following sources of information may be used:
(1) 
Lake County Wetland Inventory, Lake County Department of Management Services.
(2) 
National Wetland Inventory, U.S. Fish and Wildlife Service.
(3) 
Lake County Soil Survey, U.S. Department of Agriculture-Natural Resources Conservation Service.
(4) 
U.S. Geological Survey Topographic Maps.
(5) 
Consultant study or Lake County Soil and Water Conservation District Natural Resource Opinion.
B. 
The above sources of information are not in hierarchical order and are to be used only to aid in determining the approximate location of wetlands. Use of such off-site maps or references is not intended to substitute for an on-site delineation.