APPENDIX G FLOOD-RESISTANT CONSTRUCTION

1.Prevent unnecessary disruption of commerce, access and public service during times of flooding.

2.Manage the alteration of natural flood plains, stream channels and shorelines.

3.Manage filling, grading, dredging and other development that may increase flood damage or erosion potential.

4.Prevent or regulate the construction of flood barriers that will divert floodwaters or that can increase flood hazards.

5.Contribute to improved construction techniques in the flood plain.

1.The subdivision of land.

2.Site improvements and installation of utilities.

3.Placement and replacement of manufactured homes.

4.Placement of recreational vehicles.

5.New construction and repair, reconstruction, rehabilitation or additions to new construction.

6.Substantial improvement of existing buildings and structures, including restoration after damage.

7.Installation of tanks.

8.Temporary structures.

9.Temporary or permanent storage, utility and miscellaneous Group U buildings and structures.

10.Certain building work exempt from permit under Section 105.2 and other buildings and development activities.

1.The floodplain administrator shall review all permit applications to determine whether proposed development is located in flood hazard areas established in Section G103.2.

2.Where a proposed development site is in a flood hazard area, all development to which this appendix is applicable as specified in Section G103.1 shall be designed and constructed with methods, practices and materials that minimize flood damage and that are in accordance with this code and ASCE 24.

1.Obtain, review and reasonably utilize data available from a federal, state or other source.

2.Determine the design flood elevation in accordance with accepted hydrologic and hydraulic engineering techniques. Such analyses shall be performed and sealed by a registered design professional. Studies, analyses and computations shall be submitted in sufficient detail to allow review and approval by the floodplain administrator. The accuracy of data submitted for such determination shall be the responsibility of the applicant.

1.Identify and describe the development to be covered by the permit.

2.Describe the land on which the proposed development is to be conducted by legal description, street address or similar description that will readily identify and definitely locate the site.

3.Include a site plan showing the delineation of flood hazard areas, floodway boundaries, flood zones, design flood elevations, ground elevations, proposed fill and excavation and drainage patterns and facilities.

4.Include in subdivision proposals and other proposed developments with more than 50 lots or larger than 5 acres (20 234 m²), base flood elevation data in accordance with Section 1612.3.1 if such data are not identified for the flood hazard areas established in Section G103.2.

5.Indicate the use and occupancy for which the proposed development is intended.

6.Be accompanied by construction documents, grading and filling plans and other information deemed appropriate by the floodplain administrator.

7.State the valuation of the proposed work.

8.Be signed by the applicant or the applicant’s authorized agent.

1.The danger that materials and debris may be swept onto other lands resulting in further injury or damage.

2.The danger to life and property due to flooding or erosion damage.

3.The susceptibility of the proposed development, including contents, to flood damage and the effect of such damage on current and future owners.

4.The importance of the services provided by the proposed development to the community.

5.The availability of alternate locations for the proposed development that are not subject to flooding or erosion.

6.The compatibility of the proposed development with existing and anticipated development.

7. The relationship of the proposed development to the comprehensive plan and flood plain management program for that area.

8.The safety of access to the property in times of flood for ordinary and emergency vehicles.

9.The expected heights, velocity, duration, rate of rise and debris and sediment transport of the floodwaters and the effects of wave action, if applicable, expected at the site.

10.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, streets and bridges.

1.A technical showing of good and sufficient cause that the unique characteristics of the size, configuration or topography of the site renders the elevation standards inappropriate.

2.A determination that failure to grant the variance would result in exceptional hardship by rendering the lot undevelopable.

3.A determination that the granting of a variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, nor create nuisances, cause fraud on or victimization of the public or conflict with existing local laws or ordinances.

4.A determination that the variance is the minimum necessary, considering the flood hazard, to afford relief.

5.Notification to the applicant in writing over the signature of the floodplain administrator  that the issuance of a variance to construct a structure below the base flood level will result in increased premium rates for flood insurance up to amounts as high as $25 for $100 of insurance coverage, and that such construction below the base flood level increases risks to life and property.