Village of Mazomanie - Procedures | Standards Applicable to All Floodplain Districts

Standards Applicable to All Floodplain Districts

§ 400-6 General standards.

§ 400-7 Hydraulic and hydrologic analyses.

§ 400-8 Watercourse alterations.

§ 400-9 Chapter 30, 31, Wis. Stats., development.

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Article II: Standards Applicable to All Floodplain Districts

§ 400-6: General standards.

The community shall review all permit applications to determine whether proposed building sites will be reasonably safe from flooding and assure that all necessary permits have been received from those governmental agencies whose approval is required by federal or state law.

If a proposed building site is in a flood-prone area, all new construction and substantial improvements shall:

(1)

Be designed and anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy;

(2)

Be constructed with flood-resistant materials;

(3)

Be constructed by methods and practices that minimize flood damages; and

(4)

Mechanical and utility equipment must be elevated to or above the flood protection elevation.

If a subdivision or other proposed new development is in a flood-prone area, the community shall assure that:

(1)

Such proposed subdivision or other proposed new development is consistent with the need to minimize flood damage within the flood-prone area;

(2)

Public utilities and facilities such as sewer, gas, electrical, and water systems are located and constructed to minimize or eliminate flood damage; and

(3)

Adequate drainage is provided to reduce exposure to flood hazards.

All subdivision proposals (including manufactured home parks) shall include regional flood elevation and floodway data for any development that meets the subdivision definition of this chapter and all other requirements in § 400-22B.

Public or private campgrounds are not allowed in the floodplain.

§ 400-7: Hydraulic and hydrologic analyses.

No floodplain development shall:

(1)

Obstruct flow, defined as development which blocks the conveyance of floodwaters by itself or with other development, causing any increase in the regional flood height; or

(2)

Cause any increase in the regional flood height due to floodplain storage area lost.

The Zoning Administrator shall deny permits if it is determined the proposed development will obstruct flow or cause any increase in the regional flood height, based on the officially adopted FIRM or other adopted map, unless the provisions of Article VIII, Amendments, are met.

§ 400-8: Watercourse alterations.

No land use permit to alter or relocate a watercourse in a mapped floodplain shall be issued until the local official has notified in writing all adjacent municipalities, the Department and FEMA regional offices, and required the applicant to secure all necessary state and federal permits. The standards of § 400-7 must be met and the flood-carrying capacity of any altered or relocated watercourse shall be maintained.

As soon as is practicable, but not later than six months after the date of the watercourse alteration or relocation and pursuant to Article VIII, Amendments, the community shall apply for a letter of map revision (LOMR) from FEMA. Any such alterations must be reviewed and approved by FEMA and the DNR through the LOMC process.

§ 400-9: Chapter 30, 31, Wis. Stats., development.

Development which requires a permit from the Department, under Chs. 30 and 31, Wis. Stats., such as docks, piers, wharves, bridges, culverts, dams, and navigational aids, may be allowed if the necessary permits are obtained and amendments to the Floodplain Zoning Ordinance are made according to Article VIII, Amendments.

Village of Mazomanie, WI

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