1. Statutory Authorization.
   1. The Legislature of the State of Utah has, in Utah Code § 10-3-701, delegated the responsibility to local governmental units to adopt regulations designed to promote the public health, safety, and general welfare of its citizenry. Therefore, the Municipal Council of White City does ordain as follows:
   2. The White City Metro Township elects to comply with the requirements of the National Flood Insurance Act of 1968 (P.L. 90-488, as amended). The National Flood Insurance Program (NFIP) is a voluntary program administered by the Federal Emergency Management Agency (FEMA), a component of the U.S. Department of Homeland Security, and the White City Metro Township's community officials have elected to join the program, participate, and enforce this Flood Damage Prevention Ordinance and the requirements and regulations of the NFIP. The NFIP, established in the aforesaid act, provides that areas of the White City Metro Township having a special flood hazard be identified by FEMA, and that floodplain management measures be applied in such flood hazard areas. Furthermore, the White City Metro Township may elect to administer the Flood Damage Prevention Ordinance to areas not identified as Special Flood Hazard Areas (SFHAs) by FEMA on the community's effective Flood Insurance Rate Map (FIRM), if the community has documentation to support that there is an inherent risk of flooding in such areas.
2. Findings of Fact.
   1. The flood hazard areas of White City are subject to periodic inundation which results in loss of life and property, health and safety hazards, disruption of commerce and governmental services, and extraordinary public expenditures for flood protection and relief, all of which adversely affect the public health, safety, and general welfare.
   2. These flood losses are created by the cumulative effect of obstructions in floodplains which cause an increase in flood heights and velocities, and by the occupancy of flood hazards areas by uses vulnerable to floods and hazardous to other lands because they are inadequately elevated, floodproofed or otherwise protected from flood damage.
   3. These potential flood losses are caused by:
      1. The cumulative effect of obstructions in floodplains that are known to cause increases in flood heights and velocities;
      2. The occupancy of flood hazard areas by structures vulnerable to floods because they are inadequately elevated or otherwise unprotected from flood damages; and
      3. Uses deemed unsuitable for floodplain areas or that do not account for the increased flood risk.
         

1. It is the purpose of this Chapter to promote the public health, safety and general welfare of the community and to minimize public and private losses due to flood conditions in specific areas by provisions designed to:
   1. Protect human life and health;
   2. Minimize expenditure of public money for costly flood control projects;
   3. Minimize the need for rescue and relief efforts associated with flooding and generally undertaken at the expense of the general public;
   4. Minimize prolonged business interruptions;
   5. Minimize damage to public facilities and utilities such as water and gas mains, electric, telephone and sewer lines, streets and bridges located in floodplains;
   6. Help maintain a stable tax base by providing for the sound use and development of flood-prone areas in such a manner as to minimize future flood blight areas; and
   7. Ensure that potential buyers are notified that property is in a flood area and can make their decisions based on full information.
      

In order to accomplish its purposes, this chapter includes methods and provisions for:

1. Restricting or prohibiting land uses that are dangerous to health, safety, or property in times of flooding, or cause excessive increases in flood heights or velocities;
2. Requiring that land uses vulnerable to floods, including facilities that serve such uses, be protected against flood damage at the time of initial construction;
3. Controlling the alteration of natural floodplains, stream channels, and natural protective barriers, which are involved in the accommodation of flood waters;
4. Controlling filling, grading, dredging and other developments that may increase flood damage; and
5. Preventing or regulating the construction of flood barriers that will unnaturally divert floodwaters or may increase flood hazards to other lands.

1. Lands to Which This Chapter Applies. This chapter shall apply to all areas of special flood hazards within the jurisdiction of White City.
2. Basis for Establishing the Areas of Special Flood Hazard. The areas of special flood hazard identified by the Federal Emergency Management Agency in a scientific and engineering report entitled, "The Flood Insurance Study for Salt Lake County and Incorporated Communities," dated November 19, 2021, with accompanying flood insurance rate maps (FIRMs), and any revisions thereto are hereby automatically adopted by reference and declared to be a part of this chapter.
3. Establishment of Development Permit. A Floodplain Development Permit shall be required to ensure conformance with the provisions of this Chapter.
4. Compliance. No structure or land shall hereafter be located, altered, or have its use changed without full compliance with the terms of this Chapter and other applicable regulations.
5. Abrogation and Greater Restrictions. This Chapter is not intended to repeal, abrogate, or impair any existing easements, covenants, or deed restrictions. However, where this Chapter and another ordinance, easement, covenant, or deed restriction conflict or overlap, whichever imposes the more stringent restrictions shall prevail.
6. Interpretation. In the interpretation and application of this Chapter, all provisions shall be:
   1. Considered as minimum requirements;
   2. Liberally construed in favor of the governing body; and
   3. Deemed neither to limit nor repeal any other powers granted under State statutes.
7. Warning and Disclaimer of Liability.
   1. The degree of flood protection required by this chapter is considered reasonable for regulatory purposes and is based on scientific and engineering considerations. Larger floods can and will occur on rare occasions. Flood heights may be increased by manmade or natural causes.
   2. This chapter does not imply that land outside the areas of special flood hazards or uses permitted within such areas will be free from flooding or flood damages. This chapter shall not create liability on the part of the municipal Township, any officer or employee thereof, or the Federal Emergency Management Agency, for any flood damages that result from reliance on this chapter, or any administrative decision lawfully made thereunder.
      

1. Floodplain Administrator Appointed. The Director of Planning and Development Services is hereby appointed the Floodplain Administrator to administer and implement the provisions of this Chapter and other appropriate sections of 44 CFR (National Flood Insurance Program Regulations) pertaining to floodplain management.
2. Duties and Responsibilities of the Floodplain Administrator. Duties and responsibilities of the Floodplain Administrator shall include, without limitation, the following:
   1. Maintain and hold open for public inspection all records pertaining to the provisions of this Chapter.
   2. Review permit application to determine whether proposed building site, including the placement of manufactured homes, will be reasonably safe from flooding.
   3. Review, approve or deny all applications for development permits required by adoption of this Chapter.
   4. Review permits for proposed development to assure that all necessary permits have been obtained from those Federal, State or local governmental agencies (including Section 404 of the Federal Water Pollution Control Act Amendments of 1972, 33 U.S.C. 1334) from which prior approval is required.
   5. Where interpretation is needed as to the exact location of the boundaries of the areas of special flood hazards (for example, where there appears to be a conflict between a mapped boundary and actual field conditions) the Floodplain Administrator shall make the necessary interpretation.
   6. Notify, in riverine situations, adjacent communities and the State Coordinating Agency which is Utah Division of Emergency Management, State Floodplain Manager, prior to any alteration or relocation of a watercourse, and submit evidence of such notification to the Federal Emergency Management Agency.
   7. Assure that the flood carrying capacity within the altered or relocated portion of any watercourse is maintained.
   8. When base flood elevation data has not been provided in accordance with Article 3, Section B, the Floodplain Administrator shall obtain, review and reasonably utilize any base flood elevation data and floodway data available from a Federal, the State of Utah or other source, in order to administer the provisions of Article 5.
   9. When a regulatory floodway has not been designated, the Floodplain Administrator must require that no new construction, substantial improvements, or other development (including fill) shall be permitted within Zones A1-30 and AE on the community's FIRM, unless it is demonstrated that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the base flood more than one foot at any point within the community.
3. Under the provisions of 44 CFR Chapter 1, Section 65.12, of the National Flood Insurance Program regulations, a community may approve certain development in Zones A1-30, AE, AH, on the community's FIRM which increases the water surface elevation of the base flood by more than one foot, provided that the community first applies for a conditional FIRM revision through FEMA (Conditional Letter of Map Revision).
   

1. Application. Application for a Floodplain Development Permit shall be presented to the Floodplain Administrator on forms furnished by him/her and may include, but not be limited to, plans in duplicate drawn to scale showing the location, dimensions, and elevation of proposed landscape alterations, existing and proposed structures, including the placement of manufactured homes, and the location of the foregoing in relation to areas of special flood hazard. Additionally, the following submittals and information are required:
   1. Plans drawn to scale shoring the location, dimensions, and elevations of proposed landscape alterations;
   2. Plans drawn to scale showing the location, dimensions, and elevation of existing and proposed structures, including the placement of manufactured homes;
   3. Location of the foregoing in relation to SFHA’s;
   4. Elevation, in relation to mean sea level, of the lowest floor (including basement and crawlspace) of all new and substantially improved structures;
   5. Elevation, in relation to mean sea level, to which any nonresidential structure (if applicable) shall be floodproofed;
   6. A certificate from a registered professional engineer that the nonresidential floodproofed structure (if applicable) shall meet the floodproofing criteria of this chapter and the NFIP Regulations;
   7. Description of the extent to which any watercourse or natural drainage will be altered or relocated as a result of proposed development;
   8. All other information that may reasonable be required by the Floodplain Administrator;
   9. Reasonable fees in accordance with the adopted fee schedule; and
   10. The municipality shall become the owner of all Floodplain Development Permits and shall maintain a record of all such information in accordance with this chapter and the NFIP Regulations.
2. Approval or Denial. Approval or denial of a Floodplain Development Permit by the Floodplain Administrator shall be based on all of the provisions of this Chapter and the following relevant factors:
   1. The danger to life and property due to flooding or erosion damage;
   2. The susceptibility of the proposed facility and its contents to flood damage and the effect of such damage on the individual owner;
   3. The danger that materials may be swept onto other lands to the injury of others;
   4. The compatibility of the proposed use with existing and anticipated development;
   5. The safety of access to the property in times of flood for ordinary and emergency vehicles;
   6. The costs of providing governmental services during and after flood conditions including maintenance and repair of streets and bridges, and public utilities and facilities such as sewer, gas, electrical and water systems;
   7. The expected heights, velocity, duration, rate of rise and sediment transport of the flood waters and the effects of wave action, if applicable, expected at the site;
   8. The necessity to the facility of a waterfront location, where applicable;
   9. The availability of alternative locations, not subject to flooding or erosion damage, for the proposed use; and
   10. The relationship of the proposed use to the comprehensive plan for that area.
       

1. The Land Use Hearing Officer shall hear and decide all appeals and requests for variances from the requirements of this chapter, as provided in Chapter 19.20. The following conditions shall apply, in addition to the provisions of Chapter 19.20:
   1. Generally, variances may be issued for new construction and substantial improvements to be erected on a lot of one-half acre or less in size contiguous to and surrounded by lots with existing structures constructed below one foot (1’)above the base level, providing the Land Use Hearing Officer has considered all technical evaluations, all relevant factors, and standards specified in other sections of this Chapter, providing the following items have been considered:
      1. The danger that materials may be swept onto other land to the injury of others;
      2. The danger to life and property due to flooding or erosion damage;
      3. The susceptibility of the proposed facility and its contents to flood damage, and the effect of such damage on the individual owner:
      4. The importance of the services provided by the proposed facility to the community;
      5. The necessity to the facility of a waterfront location, where applicable;
      6. The availability of alternative locations for the proposed use, which are not subject to flooding or erosion damage;
      7. The compatibility of the proposed use with the existing and anticipated development;
      8. The relationship of the proposed use to the comprehensive plan and floodplain management program for that area;
      9. The safety of access to the property in times of flood for ordinary and emergency vehicles;
      10. The expected heights, velocity, duration, rate of rise, and sediment transport of the floodwaters and the effects of wave action, if applicable, expected at the site;
      11. The costs of providing governmental services during and after flood conditions, including maintenance and repair of public utilities and facilities such as sewer, gas, electrical and water systems, and streets and bridges.
   2. Variances may be issued for the reconstruction, rehabilitation or restoration of structures listed on the National Register of Historic Places or the State Inventory of Historic Places, without regard to the procedures set forth in the remainder of this section.
   3. Variances shall not be issued within any designated floodway if any increase in flood levels during the base flood discharge would result.
   4. The Floodplain Administrator shall maintain in perpetuity a record of all variance actions, including justification for their issuance, and shall report variances to FEMA and the State Coordinating Agency upon issuing a variance.
2. Prerequisites for Granting a Variance.
   1. Variances may only be issued upon a determination that the variance is the minimum necessary, considering the flood hazard, to afford relief.
   2. Variances may only be issued upon:
      1. A showing of good and sufficient cause;
      2. A determination that failure to grant the variance would result in exceptional and undue hardship to the applicant; and
      3. A determination that the granting of a variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud on or victimization of the public, or conflict with existing local laws or ordinances.
   3. Any applicant to whom a variance is granted shall be given written notice that the structure will be permitted to be built with a lowest floor elevation below one foot above the base flood elevation and that the cost of flood insurance will be commensurate with the increased flood risk resulting from the reduced lowest floor elevation.
3. Variances may be issued by the municipality for new construction and substantial improvements and for other development necessary for the conduct of a functionally dependent use provided that:
   1. The criteria outlined in Subsection 19.56.060.B.1-10 are met; and
   2. The structure or other development is protected by methods that minimize flood damages during the base flood and create no additional threats to public safety.
4. The Land Use Hearing Officer shall maintain the record of all appeal actions and report any variances to the Federal Emergency Management Agency upon request.
   

1. General Standards. In all areas of special flood hazards, the following standards are required for all new construction and substantial improvements:
   1. All new construction and substantial improvements shall be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the structure and capable of resisting the hydrostatic and hydrodynamic loads, including the effects of buoyancy;
   2. All new construction or substantial improvements shall be constructed by methods and practices that minimize flood damage;
   3. All new construction or substantial improvements shall be constructed with materials resistant to flood damage;
   4. All new construction or substantial improvements shall be constructed with electrical, heating, ventilation, plumbing, and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding;
   5. All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system;
   6. New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the system and discharge from the systems into flood waters; and
   7. On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
2. Substantial Improvement and Substantial Damage Determination. For applications for building permits to improve buildings and structures, including alterations, movement, enlargement, replacement, repair, change of occupancy, additions, rehabilitations, renovations, and any other improvement of or work on such buildings and structures, the Floodplain Administrator, shall:
   1. Estimate the market value of the building or structure only (not of land) before the start of construction of the proposed work. If the applicant disagrees with the estimated market value, the applicant may obtain an appraisal of the market value prepared by a qualified independent appraiser. In the case of repair, the market value of the building or structure shall be the market value before the damage occurred and before any repairs are made.
   2. Compare the cost to perform the improvement, the cost to repair a damaged building to its pre-damaged condition, or the combined costs of improvements and repairs, if applicable, to the market value of the building or structure.
   3. Determine and document whether the proposed work constitutes substantial improvement or repair of substantial damage; the determination requires evaluation of previous permits issued for improvements and repairs.
   4. Utilize FEMA’s Substantial Improvement/Substantial Desk Reference when making any determination on Substantial Improvement and/or Substantial Damage.
   5. The substantial improvement regulations apply to all of the work that is proposed as the improvement, even if multiple permits are issued. Therefore, the determination of the cost of the improvement should consider all costs of all phases of the work before issuance of the first permit.
   6. Notify the applicant that if it is determined that the work constitutes substantial improvement or repair of substantial damage, compliance with the flood regulations of this chapter is required.
3. Specific Standards. In all areas of special flood hazards where base flood elevation data has been provided as set forth in this chapter, the following standards are required:
   1. Residential Construction. New construction and substantial improvement of any residential structure shall have the lowest floor (including basement) elevated to 1 foot or more above the base flood elevation. A registered professional engineer, or land surveyor shall submit a certification to the Floodplain Administrator that the standard of this chapter are satisfied.
   2. Nonresidential Construction. New construction and substantial improvement of any commercial, industrial or other nonresidential structure shall either have the lowest floor (including basement) elevated to 1 foot (1’) or more above the base flood elevation or together with attendant utility and sanitary facilities, be designed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. A registered professional engineer shall develop and/or review structural design, specifications, and plans for the construction, and shall certify that the design and methods of construction are in accordance with accepted standards of practice as outlined in this subsection. A record of such certification which includes the specific elevation (in relation to mean sea level) to which such structures are floodproofed shall be maintained by the Floodplain Administrator.
   3. Enclosures. New construction and substantial improvements, with fully enclosed areas below the lowest floor that are usable solely for parking of vehicles, building access or storage in an area other than a basement and which are subject to flooding shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or meet or exceed the following minimum criteria:
      1. A minimum of two openings having a total net area of not less than one (1) square inch for every square foot of enclosed area subject to flooding shall be provided.
      2. The bottom of all openings shall be no higher than one foot (1’) above grade.
      3. Openings may be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.
   4. Enclosures Below the BFE. Enclosures below the base flood elevation (BFE) may only be used for building access, vehicle parking, and storage. Certification and documentation from a professional, licensed engineer is required if the structure’s lowest floor is built below the BFE. Applicant shall enter into a maintenance and nonconversion agreement with the municipality that it will maintain the improvements outlined in this paragraph and not modify or convert them to uses other than approved uses.
   5. Crawlspaces. New construction and substantial improvements built on an at grade crawlspace or sub-grade (below grade) crawlspace may be permitted if the development is designed and meets or exceeds the standards found in FEMA’s Technical Bulletins 1, 2, and 11, which include but are not limited to the following:
      1. The structure must be affixed to a permanent foundation, designed and adequately anchored to resist flotation, collapse, and lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy. Because of hydrodynamic loads, crawlspace construction is not allowed in areas with flood velocities greater than 5 feet per second unless the design is reviewed by a qualified design professional, such as a registered professional engineer.
      2. The crawlspace is an enclosed area below the BFE and, as such, must have flood openings that equalize hydrostatic pressures by allowing the automatic entry and exit of floodwaters. The bottom of each flood vent opening can be no more than one foot (1’) above the lowest adjacent grade (LAG).
      3. The crawlspace enclosure must have proper flood openings that allow equalization of hydrostatic pressure by allowing automatic entry and exit of floodwaters. To achieve this, a minimum of one (1) square inch of flood opening is required per one (1) square foot of the enclosed area subject to flooding.
      4. Portions of the building below the BFE must be constructed with materials resistant to flood damage. This includes not only the foundation walls of the crawlspace used to elevate the building, but also any joists, insulation, piers, or other materials that extend below the BFE. Ductwork must either be placed above the BFE or sealed from floodwaters.
      5. Any building utility systems within the crawlspace must be elevated above the BFE or designed so that floodwaters cannot enter or accumulate within the system components during flood conditions.
      6. The interior grade of a crawlspace below the BFE must not be more than two feet (2’) below the LAG.
      7. The height of the below-grade crawlspace, measured from the lowest interior grade of the crawlspace floor to the bottom of the floor joist of the next higher floor may not exceed four feet (4') at any point.
      8. There must be an adequate drainage system that removes floodwaters from the interior area of the crawlspace. The enclosed area should be drained within a reasonable time after a flood event.
      9. Note: Buildings with below grade crawlspaces will have higher flood insurance premiums than buildings that have preferred crawlspace construction, with interior elevation at or above the LAG.
   6. Manufactured Homes.
      1. All manufactured homes to be placed within Zone A on the municipality’s FHBM or FIRM shall be installed using methods and practices which minimize flood damage. For the purposes of this requirement, manufactured homes must be elevated and anchored to resist flotation, collapse, or lateral movement. Methods of anchoring may include, without limitation, use of over-the-top or frame ties to ground anchors. This requirement is in addition to applicable State of Utah and local anchoring requirements for resisting wind forces.
      2. Manufactured homes that are placed or substantially improved within Zones A1-30, AH, and AE on the municipality's FIRM on sites outside of a manufactured home park or subdivision; in a new manufactured home park or subdivision; in an expansion to an existing manufactured home park or subdivision; or in an existing manufactured home park or subdivision on which a manufactured home has incurred substantial damage as a result of a flood, be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to one foot (1’) or more above the base flood elevation and be securely anchored to an adequately anchored foundation system to resist flotation, collapse, and lateral movement.
      3. In the A1-30, AH, AO and AE Zones, manufactured homes placed or substantially improved in an existing manufactured home park shall be elevated so that the lowest floor is one foot (1’) or more above the base flood elevation; or the manufactured home chassis is supported by reinforced piers or other foundation elements of at least equivalent strength that are no less than thirty-six inches (36”) in height above grade and be securely anchored to an adequately anchored foundation system to resist flotation, collapse, and lateral movement.
   7. Recreational Vehicles. Recreational vehicles placed on sites within Zones A1-30, AH, and AE on the municipality's FIRM shall either:
      1. Be on the site for fewer than one hundred eighty (180) consecutive days and be fully licensed and ready for highway use;
      2. A recreational vehicle is ready for highway use if it is on its wheels or jacking system, is attached to the site only by quick disconnect type utilities and security devices, and has no permanently attached additions; or
      3. Meet the permit requirements and the elevation and anchoring requirements for manufactured homes in this Section.
4. Standards for Subdivision Proposals.
   1. All subdivision proposals including the placement of manufactured home parks and subdivisions shall have adequate drainage provided to reduce exposure to flood hazards.
   2. All proposals for the development of subdivisions including the placement of manufactured home parks and subdivisions shall meet Floodplain Development Permit and other requirements of this chapter.
   3. Base flood elevation data shall be generated for subdivision proposals and other proposed development that is greater than fifty (50) lots or five (5) acres, including the placement of manufactured home parks and subdivisions.
   4. All subdivision proposals, including the placement of manufactured home parks and subdivisions shall, have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize or eliminate flood damage.
5. Standards for Areas of Shallow Flooding (AO/AH Zones). Located within the areas of special flood hazard established by this chapter, are areas designated as shallow flooding. These areas have special flood hazards associated with base flood depths of one1 to three feet (3’) where a clearly defined channel does not exist and where the path of flooding is unpredictable and where velocity flow may be evident. Such flooding is characterized by ponding or sheet flow; therefore, the following provisions apply:
   1. All new construction and substantial improvements of residential structures have the lowest floor (including basement) elevated one foot (1’) or more above the highest adjacent grade at least as high as the depth number specified in feet on the community's FIRM (at least two feet if no depth number is specified).
   2. All new construction and substantial improvements of non-residential structures:
      1. Have the lowest floor (including basement) elevated one foot (1’) or more above the highest adjacent grade at least as high as the depth number specified in feet on the municipality's FIRM (at least two feet (2') if no depth number is specified), or;
      2. Together with attendant utility and sanitary facilities be designed so that below one foot (1’) above the base flood level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads of effects of buoyancy.
   3. A registered professional engineer shall submit a certification to the Floodplain Administrator that the standards of this subsection are satisfied.
   4. Require within Zones AH or AO adequate drainage paths around structures on slopes, to guide flood waters around and away from proposed structures.
6. Floodways. Located within areas of special flood hazard established in Section 19.56.040 are areas designated as "floodways." Since the floodway is an extremely hazardous area due to the velocity of floodwaters which carry debris, potential projectiles, and erosion potential, the following provisions apply:
   1. Designate a regulatory floodway that will not increase the base flood level more than 1 foot.
   2. Encroachments, including fill, new construction, substantial improvements, placement of manufactured homes, and other developments, are prohibited unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in flood levels within the community during the occurrence of the base flood discharge.
   3. If Subsection 19.56.080.A, all new construction and substantial improvements and placement of manufactured homes shall comply with all applicable flood-hazard reduction provisions of Sections 19.56.100 through 19.56.180.
   4. Under the provisions of 44 CFR Chapter 1, Section 65.12, of the National Flood Insurance Regulations, the municipality may permit encroachments within the adopted regulatory floodway that would result in an increase in base flood elevations, provided that the municipality first applies for a conditional FIRM and floodway revision through FEMA.