Source: https://www.ecode360.com/28706208
Timestamp: 2019-04-20 16:14:15+00:00

Document:
§ 166-3 Base flood elevation.
§ 166-4 Duties of Building Inspector.
§ 166-6 Standards to prevent increased flood heights.
§ 166-7 Standards to protect buildings.
§ 166-9 Public health and other standards.
§ 166-10 Maintenance of capacity; notification of adjacent communities.
§ 166-12 Disclaimer of liability.
§ 166-13 Violations and penalties.
§ 166-14 Abrogation and greater restrictions.
Historic preservation districts — See Ch. 177.
Stormwater management — See Ch. 257.
Subdivision of land — See Ch. 265.
Trailers and trailer parks — See Ch. 282.
To preserve the natural characteristics and functions of watercourses and floodplains in order to moderate flood and stormwater impacts, improve water quality, reduce soil erosion, protect aquatic and riparian habitat, provide recreational opportunities, provide aesthetic benefits and enhance community and economic development.
The flood having a one-percent probability of being equaled or exceeded in any given year. The base flood is also known as the "one-hundred-year flood." The base flood elevation at any location is as defined in § 166-3 of this chapter.
The elevation in relation to mean sea level of the crest of the base flood.
A walled and roofed structure that is principally above ground, including manufactured homes, prefabricated buildings and gas or liquid storage tanks. The term also includes recreational vehicles and travel trailers installed on a site for more than 180 days per year.
Any facility which is critical to the health and welfare of the population and, if flooded, would create an added dimension to the disaster. Damage to these critical facilities can impact the delivery of vital services, can cause greater damage to other sectors of the community, or can put special populations at risk.
Examples of critical facilities where flood protection should be required include emergency services facilities (such as fire and police stations), schools, hospitals, retirement homes and senior care facilities, major roads and bridges, critical utility sites (telephone switching stations or electrical transformers, and hazardous material storage facilities (chemicals, petrochemicals, hazardous or toxic substances).
Storage of materials, including the placement of gas and liquid storage tanks, and channel modifications or any other activity that might change the direction, height, or velocity of flood or surface waters.
"Development" does not include routine maintenance of existing buildings and facilities, resurfacing roads, or gardening, plowing, and similar practices that do not involve filling, grading, or construction of levees.
A manufactured home park or subdivision for which the construction of facilities for servicing the lots on which the manufactured homes are to be affixed or buildings to be constructed (including, at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads) is completed before the effective date of the floodplain management regulations adopted by a community.
A general and temporary condition of partial or complete inundation of normally dry land areas from the overflow, the unusual and rapid accumulation, or the runoff of surface waters from any source.
That portion of the floodplain outside of the regulatory floodway.
A map prepared by the Federal Emergency Management Agency that depicts the floodplain or special flood hazard area (SFHA) within a community. This map includes insurance rate zones and may or may not depict floodways and show base flood elevations.
These two terms are synonymous.
Those lands within the jurisdiction of the City of Mendota, the extraterritorial jurisdiction of the City of Mendota, or that may be annexed into the City of Mendota that are subject to inundation by the base flood. The floodplains of the City of Mendota are generally identified as such on panel number(s) 167,175 and 180 of the countywide Flood Insurance Rate Map of LaSalle County prepared by the Federal Emergency Management Agency and dated May 19, 2014. "Floodplain" also includes those areas of known flooding as identified by the community.
The floodplains of those parts of unincorporated LaSalle County that are within the extraterritorial jurisdiction of the City of Mendota or that may be annexed into the City of Mendota are generally identified as such on the Flood Insurance Rate Map prepared for LaSalle County by the Federal Emergency Management Agency and dated May 19, 2014.
Any combination of structural or nonstructural additions, changes, or adjustments to structures which reduce or eliminate flood damage to real estate, property and their contents.
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.
The elevation of the base flood plus one foot of freeboard at any given location in the floodplain.
That portion of the floodplain required to store and convey the base flood. The floodway for the floodplains of First Creek, First Creek Tributary and Mendota Creek shall be as delineated on the countywide Flood Insurance Rate Map of LaSalle County prepared by FEMA and dated May 19, 2014. The floodways for each of the remaining floodplains of the City of Mendota shall be according to the best data available from federal, state, or other sources.
An increment of elevation added to the base flood elevation to provide a factor of safety for uncertainties in calculations, future watershed development, unknown localized conditions, wave actions and unpredictable effects such as those caused by ice or debris jams.
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.
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.
Individually listed on the state inventory of historic places by the Illinois Historic Preservation Agency.
Individually listed on a local inventory of historic places that has been certified by the Illinois Historic Preservation Agency.
The Illinois Department of Natural Resources/Office of Water Resources.
The Illinois Department of Natural Resources Office of Water Resources has jurisdiction over any stream serving a tributary area of 640 acres or more in an urban area, or in the floodway of any stream serving a tributary area of 6,400 acres or more in a rural area. Construction on these streams requires a permit from the Department (17 Ill. Admin. Code 3700.30). The Department may grant approval for specific types of activities by issuance of a statewide permit which meets the standards defined in § 166-6 of this chapter.
The lowest floor of the lowest enclosed area (including basement). An unfinished or flood-resistant enclosure usable solely for parking of vehicles, building access or storage in an area other than a basement area is not considered a building's lowest floor, provided that such enclosure is not built so as to render the structure in violation of the applicable nonelevation design requirements of § 166-7 of this chapter.
A structure, transportable in one or more sections, that is built on a permanent chassis and is designed to be used with or without a permanent foundation when connected to required utilities.
A parcel (or contiguous parcels) of land divided into two or more lots for rent or sale.
Structures for which the start of construction commenced on or after the effective date of floodplain management regulations adopted by a community and includes any subsequent improvements of such structures.
A manufactured home park or subdivision for which the construction of facilities for servicing the lots on which the manufactured homes are to be affixed or buildings to be constructed (including, at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads) is completed on or after the effective date of the floodplain management regulations adopted by a community.
Built on a single chassis.
Four hundred square feet or less in size.
Designed to be self-propelled or permanently towable by a light-duty truck and designed primarily not for use as a permanent dwelling but as temporary living quarters for recreational, camping, travel or seasonal use.
Flood-related damages sustained by a structure on two separate occasions during a ten-year period for which the cost of repairs at the time of each such flood event on the average equals or exceeds 25% of the market value of the structure before the damage occurred.
Includes substantial improvement and means the date the building permit was issued, provided the actual start of construction, repair, reconstruction, rehabilitation, addition placement or other improvement was within 180 days of the permit date. The "actual start" means either the first placement of permanent construction of a structure on a site, such as the pouring of slab or footings, the installation of piles, the construction of columns or any work beyond the stage of excavation or placement of a manufactured home on a foundation. For a substantial improvement, the actual start of construction means the first alteration of any wall, ceiling, floor or other structural part of a building, whether or not that alteration affects the external dimensions of the building.
Damage of any origin sustained by a structure whereby the cumulative percentage of damage subsequent to the adoption of this chapter equals or exceeds 50% of the market value of the structure before the damage occurred, regardless of actual repair work performed. Volunteer labor and materials must be included in this determination. The term includes repetitive loss buildings (see definition of "repetitive loss").
Increases the floor area by more than 20%.
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. This term includes structures which have incurred repetitive loss or substantial damage, regardless of the actual repair work done.
Any alteration of a structure listed on the National Register of Historic Places or the Illinois Register of Historic Places.
The failure of a structure or other development to be fully compliant with the community's floodplain management regulations. A structure or other development without the required federal, state, and/or local permits and elevation certification is presumed to be in violation until such time as the documentation is provided.
This chapter's protection standard is the base flood. The best available base flood data are listed below. Whenever a party disagrees with the best available data, the party shall finance the detailed engineering study needed to replace the existing data with better data and submit it to the FEMA and IDNR/OWR for approval prior to any development of the site.
The base flood elevation for the floodplains of First Creek, First Creek Tributary and Mendota Creek shall be as delineated on the one-hundred-year flood profiles in the countywide Flood Insurance Study of LaSalle County prepared by the Federal Emergency Management Agency and dated May 19, 2014.
The base flood elevation for each floodplain delineated as an AH Zone or AO Zone shall be that elevation (or depth) delineated on the countywide Flood Insurance Rate Map of LaSalle County.
The base flood elevation for each of the remaining floodplains delineated as an A Zone on the countywide Flood Insurance Rate Map of LaSalle County shall be according to the best data available from federal, state or local sources. Should no other data exist, an engineering study must be financed by the applicant to determine base flood elevations.
The base flood elevation for the floodplains of those parts of unincorporated LaSalle County that are within the extraterritorial jurisdiction of the City of Mendota, or that may be annexed into the City of Mendota, shall be as delineated on the one-hundred-year flood profiles in the Flood Insurance Study of LaSalle County prepared by the Federal Emergency Management Agency and dated May 19, 2014.
Maintain the accuracy of floodplain maps, including notifying IDNR/OWR and/or submitting information to FEMA within six months whenever a modification of the floodplain may change the base flood elevation or result in a change to the floodplain map.
No person, firm, corporation, or governmental body not exempted by law shall commence any development in the floodplain without first obtaining a development permit from the Building Inspector. The Building Inspector shall not issue a development permit if the proposed development does not meet the requirements of this chapter.
Cost of project or improvements as estimated by a licensed engineer or architect. A signed estimate by a contractor may also meet this requirement.
Upon receipt of an application for a development permit, the Building Inspector shall compare the elevation of the site to the base flood elevation. Any development located on land that is shown by survey elevation to be below the current base flood elevation is subject to the provisions of this chapter. In addition, any development located on land shown to be below the base flood elevation and hydraulically connected to a flood source, but not identified as a floodplain on the current Flood Insurance Rate Map, is subject to the provisions of this chapter. Any development located on land that can be shown by survey data to be higher than the current base flood elevation and which has not been filled after the date of the site's first Flood Insurance Rate Map is not in the floodplain and therefore not subject to the provisions of this chapter.
The Building Inspector shall maintain documentation of the existing ground elevation at the development site and certification that this ground elevation existed prior to the date of the site's first Flood Insurance Rate Map identification.
The Building Inspector shall be responsible for obtaining from the applicant copies of all other federal, state, and local permits, approvals or permit-not-required letters that may be required for this type of activity. The Building Inspector shall not issue a permit unless all other federal, state, and local permits have been obtained.
Bridge and culvert crossings of streams in rural areas meeting the conditions of the Illinois Department of Natural Resources, Office of Water Resources Statewide Permit Number 2.
Barge fleeting facilities meeting the conditions of IDNR/OWR Statewide Permit Number 3.
Aerial utility crossings meeting the conditions of IDNR/OWR Statewide Permit Number 4.
Minor boat docks meeting the following conditions of IDNR/OWR Statewide Permit Number 5.
Minor, nonobstructive activities such as underground utility lines, light poles, sign posts, driveways, athletic fields, patios, playground equipment, minor storage buildings not exceeding 70 square feet and raising buildings on the same footprint which does not involve fill and any other activity meeting the conditions of IDNR/OWR Statewide Permit Number 6.
Outfall structures and drainage ditch outlets meeting the following conditions of IDNR/OWR Statewide Permit Number 7.
Underground pipeline and utility crossings meeting the conditions of IDNR/OWR Statewide Permit Number 8.
Bank stabilization projects meeting the conditions of IDNR/OWR Statewide Permit Number 9.
Accessory structures and additions to existing residential buildings meeting the conditions of IDNR/OWR Statewide Permit Number 10.
Minor maintenance dredging activities meeting the following conditions of IDNR/OWR Statewide Permit Number 11.
Bridge and culvert replacement structures and bridge widening meeting the following conditions of IDNR/OWR Statewide Permit Number 12.
Temporary construction activities meeting the following conditions of IDNR/OWR statewide Permit Number 13.
Any development determined by IDNR/OWR to be located entirely within a flood fringe area shall be exempt from state floodway permit requirements.
Sufficient data has been provided to FEMA when necessary, and approval has been obtained from FEMA for a revision of the regulatory map and base flood elevation.
Construction or placement of a new building or alteration or addition to an existing building valued at more than $1,000 or 70 square feet.
Substantial improvements or structural alterations made to an existing building that increase the floor area by more than 20% or equal or exceed the market value by 50%. Alteration shall be figured cumulatively subsequent to the adoption of this chapter. If substantially improved, the existing structure and the addition must meet the flood protection standards of this section.
Repairs made to a substantially damaged building. These repairs shall be figured cumulatively subsequent to the adoption of this chapter. If substantially damaged, the entire structure must meet the flood protection standards of this section within 24 months of the date the damage occurred.
Installing a travel trailer or recreational vehicle on a site for more than 180 days per year.
Repetitive loss to an existing building as defined in § 166-2.
Construction of buildings shall not adversely affect the flow of surface drainage from or onto neighboring properties and, when necessary, stormwater management techniques such as swales or basins shall be incorporated.
The foundation and supporting members shall be anchored, designed, and certified so as to minimize exposure to hydrodynamic forces such as current, waves, ice, and floating debris.
In lieu of the above criteria, the design methods to comply with these requirements may be certified by a licensed professional engineer or architect.
Utility systems within the crawl space must be elevated above the flood protection elevation.
Below the flood protection elevation, the structure and attendant utility facilities are watertight and capable of resisting the effects of the base flood.
The building design accounts for flood velocities, duration, rate of rise, hydrostatic and hydrodynamic forces, the effects of buoyancy, and the impact from debris and ice.
Floodproofing measures will be incorporated into the building design and operable without human intervention and without an outside source of electricity.
Levees, berms, floodwalls and similar works are not considered floodproofing for the purpose of this subsection.
Anchored to resist flotation, collapse, or lateral movement by being tied down in accordance with the rules and regulations for the Illinois Mobile Home Tie-Down Act issued pursuant to 77 Ill. Adm. Code 870.
Have a hitch jack permanently mounted, have the tires touching the ground and be supported by blocks in a manner that will allow the blocks to be easily removed by use of the hitch jack.
The garage or shed must be nonhabitable.
The garage or shed must be used only for the storage of vehicles and tools and cannot be modified later into another use.
The garage or shed must be located outside of the floodway or have the appropriate state and/or federal permits.
The garage or shed must be on a single-family lot and be accessory to an existing principal structure on the same lot.
Below the base flood elevation, the garage or shed must be built of materials not susceptible to flood damage.
All utilities, plumbing, heating, air conditioning and electrical must be elevated above the flood protection elevation.
The garage or shed must have at least one permanent opening on each wall not more than one foot above grade with one square inch of opening for every one square foot of floor area.
The garage or shed must be less than $15,000 in market value or replacement cost, whichever is greater, or less than 576 square feet (24 feet by 24 feet).
The structure shall be anchored to resist flotation and overturning.
All flammable or toxic materials (gasoline, paint, insecticides, fertilizers, etc.) shall be stored above the flood protection elevation.
The lowest floor elevation should be documented and the owner advised of the flood insurance implications.
The City of Mendota shall take into account hazards, to the extent that they are known, in all official actions related to land management use and development.
A signed statement by a licensed professional engineer that the proposed plat or plan accounts for changes in the drainage of surface waters in accordance with the Plat Act (765 ILCS 205/2).
Streets, blocks, lots, parks and other public grounds shall be located and laid out in such a manner as to preserve and utilize natural streams and channels. Wherever possible, the floodplains shall be included within parks or other public grounds.
No development in the floodplain shall include locating or storing chemicals, explosives, buoyant materials, flammable liquids, pollutants, or other hazardous or toxic materials below the flood protection elevation unless such materials are stored in a floodproofed and anchored storage tank and certified by a professional engineer or floodproofed building constructed according to the requirements of § 166-7 of this chapter.
Public utilities and facilities such as sewer, gas and electric shall be located and constructed to minimize or eliminate flood damage.
Public sanitary sewer systems and water supply systems shall be located and constructed to minimize or eliminate infiltration of floodwaters into the systems and discharges from the systems into floodwaters.
New and replacement on-site sanitary sewer lines or waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding. Manholes or other aboveground openings located below the flood protection elevation shall be watertight.
Construction of new or substantially improved critical facilities shall be located outside the limits of the floodplain. Construction of new critical facilities shall be permissible within the floodplain if no feasible alternative site is available. Critical facilities constructed within the SFHA shall have the lowest floor (including basement) elevated or structurally dry floodproofed to the five-hundred-year flood frequency elevation or three feet above the level of the one-hundred-year flood frequency elevation, whichever is greater. Floodproofing and sealing measures must be taken to ensure that toxic substances will not be displaced by or released into floodwaters. Access routes elevated to or above the level of the base flood elevation shall be provided to all critical facilities.
All other activities defined as development shall be designed so as not to alter flood flows or increase potential flood damages.
For all projects involving channel modification, fill, or stream maintenance (including levees), the flood-carrying capacity of the watercourse shall be maintained. In addition, the City of Mendota shall notify adjacent communities in writing 30 days prior to the issuance of a permit for the alteration or relocation of the watercourse.
Whenever the standards of this chapter place undue hardship on a specific development proposal, the applicant may apply to the Building Inspector for a variance. The Building Inspector shall review the applicant's request for a variance and shall submit his recommendation to the City Council of the City of Mendota. The City Council may attach such conditions to granting of a variance as it deems necessary to further the intent of this chapter.
All other state and federal permits have been obtained.
Require that the applicant proceed with knowledge of these risks and that the applicant acknowledge in writing the assumption of the risk and liability.
The repair or rehabilitation is the minimum necessary to preserve the historic character and design of the structure.
The repair or rehabilitation will not result in the structure being removed as a certified historic structure.
All agricultural structures considered for a variance from the floodplain management regulations of this chapter shall demonstrate that the varied structure is located in wide, expansive floodplain areas and no other alternate location outside of the special flood hazard area exists for the agricultural structure. Residential structures or animal confinement facilities, such as farm houses, cannot be considered agricultural structures.
Use of the varied structures must be limited to agricultural purposes in Zone A only as identified on the community's Flood Insurance Rate Map (FIRM).
For any new or substantially damaged agricultural structures, the exterior and interior building components and elements (i.e., foundation, wall framing, exterior and interior finishes, flooring, etc.) below the base flood elevation must be built with flood-resistant materials in accordance with § 166-7 of this chapter.
The agricultural structures must be adequately anchored to prevent flotation, collapse, or lateral movement of the structures in accordance with `66-7 of this chapter. All of the building's structural components must be capable of resisting specific flood-related forces, including hydrostatic, buoyancy, and hydrodynamic and debris impact forces.
Any mechanical, electrical, or other utility equipment must be located above the base flood elevation or floodproofed so that they are contained within a watertight, floodproofed enclosure that is capable of resisting damage during flood conditions in accordance with § 166-7 of this chapter.
The NFIP requires that enclosure or foundation walls, subject to the one-hundred-year flood, contain openings that will permit the automatic entry and exit of floodwaters in accordance with § 166-7B of this chapter.
The agricultural structures must comply with the floodplain management floodway provisions of § 166-6 of this chapter. No variances may be issued for agricultural structures within any designated floodway.
Wet-floodproofing construction techniques must be reviewed and approved by the floodplain administrator and a registered professional engineer or architect prior to the issuance of any floodplain development permit for construction.
The degree of protection required by this chapter is considered reasonable for regulatory purposes and is based on available information derived from engineering and scientific methods of study. Larger floods may occur or flood heights may be increased by man-made or natural causes. This chapter does not imply that development either inside or outside of the floodplain will be free from flooding or damage. This chapter does not create liability on the part of the City of Mendota or any officer or employee thereof for any flood damage that results from proper reliance on this chapter or any administrative decision made lawfully thereunder.
Failure to obtain a permit for development in the floodplain or failure to comply with the conditions of a permit or a variance shall be deemed to be a violation of this chapter. Upon due investigation, the Building Inspector, Mayor or City Attorney may determine that a violation of the minimum standards of this chapter exists. The Building Inspector, Mayor or City Attorney shall notify the owner in writing of such violation.
If such owner fails, after 10 days' notice, to correct the violation, the City of Mendota shall make application to the Circuit Court for an injunction requiring conformance with this chapter or make such other order as the court deems necessary to secure compliance with this chapter.
Any person who violates this chapter shall, upon conviction thereof, be fined as set forth in Chapter 1, Article III, Penalties and Enforcement, of the City Code.
The City of Mendota shall record a notice of violation on the title of the property.
The Building Inspector, Mayor or City Attorney shall inform the owner that any such violation is considered a willful act to increase flood damages and therefore may cause coverage by a standard flood insurance policy to be suspended.
The Building Inspector, Mayor or City Attorney is authorized to issue an order requiring the suspension of the subject development. The stop-work order shall be in writing, indicate the reason for the issuance, and shall order the action, if necessary, to resolve the circumstances requiring the stop-work order. The stop-work order constitutes a suspension of the permit.
No site development permit shall be permanently suspended or revoked until a hearing is held by the Building Inspector.
The time and place of the hearing.
At such hearing, the permittee shall be given an opportunity to present evidence on its behalf. At the conclusion of the hearing, the Building Inspector shall determine whether the permit shall be suspended or revoked.
Nothing herein shall prevent the City of Mendota from taking such other lawful action to prevent or remedy any violations. All costs connected therewith shall accrue to the person or persons responsible.
This chapter repeals and replaces other ordinances adopted by the City Council of the City of Mendota to fulfill the requirements of the National Flood Insurance Program, including Ord. No. 07-05-11A. However, this chapter does not repeal the original resolution or ordinance adopted to achieve eligibility in the program; nor does this chapter repeal, abrogate, or impair any existing easements, covenants, or deed restrictions. Where this chapter and other ordinances, easements, covenants or deed restrictions conflict or overlap, whichever imposes the more stringent restrictions shall prevail.

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