HomeMy WebLinkAbout0483 Ord (Amend Zoning)•
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ORDINANCE N0. 483
AN ORDINANCE AMENDING ORDINANCE NO. 383. THE ZONING ORDINANCE, PROVIDING FOR
A FLOOD PLAIN OVERLAY ZONING DISTRICT.
THE CITY COUNCIL OF THE CITY OF STILLWATER DOES ORDAIN:
Section 1. Amending. Section 10. Use Districts, of Ordinance No. 383, the
Zoning Ordinance, is amended to add the following new subdivision:
• 8. FP - Flood Plain Overlay District
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Section 2. Amending. Ordinance No. 383 is amended to add the following new
section:
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Section 1. Area. The Flood Plain Overlay District shall consist of that
-'area of the City which would be inundated by a Regional Flood known to have
occurred in the area and reasonably characteristic of what can be expected
to occur on an average frequency in the magnitude of the 100 year recurrence
interval. This area is delineated on the Zoning Map of the City. Lots
partially within the Flood Plain Overlay District are considered to be
entirely within it.
Section 2. Scope. Within the Flood Plain Overlay District, in addition to
adhering to all requirements as prescribed herein, all structures constructed
or altered to the extent of greater than fifty per cant (50%) of their current
market value shall be required to adhere to the Zoning Requirements Relating
to Non Conforming Uses and Prescribing Permitted Uses and Area Requirements
for the lot on which they are located.
Section 3. Flood plain Building Requirements.
3.01 General. All structures hereafter constructed within the Flood
Plain Overlay District or altered to the extent of greater than fifty percent
(5016) of their current market value shall be required to adhere to standard
flood proofing techniques and practices as required herein. by the State of
Minnesota's Department of Natural Resources, and by the U. S. Army Corps of
Engineers up to the Flood Protection Elevation. This is that point not less
than one (1) foat above the water surface profile associated with a regional
flood, plus and increases in flood stages attributable to encroachments upon
the flood plain, as defined. The Flood protection Elevation within the City
of Stillwater is deemed to be 696 feet above sea level.
3.02 Flood Proofing. Where flood proofing is incorporated into
new buildings or structures, and into alterations or additions to existing
non conforming structures, flood proofing measures shall be provided to the
Flood Protection Elevation and designed to withstand flood velocities, depths.
durations, forces and any other factors associated with the regional flood.
A plan or document certified by a registered professional engineer or architect
that the flood proofing measures are adequately designed to withstand regional
flood conditions shall be submitted to the City for approval before authorization
is granted for the proposed work. Authorized flood proofing measures shall
include such provisions as the anchorage of structures to prevent flotation.
the installation of water tight barriers over openings, the reinforcement of
walls to resist water pressures, the use of materials to reduce wall seepage,
the construction or modification of water supply and waste disposal systems
to prevent entry of flood waters, the placement of essential utilities above
the flood protection elevation, and the installation of pumping facilities
for internal and subsurface drainage. Electrical and heating equipment within
these structures, shall be at or above the flood protection elevation for the
site or shall be adequately flood proofed.
3.03 Residential Areas. The finished surface of the first floor or
basement floor of any residential building or structure to be erected, constructed.
reconstructed, altered or moved on the flood plain shall ordinarily be placed
on fill at or above the flood protection elevation. The fill shall extend at
such elevation at least 15 feet beyond the limits of any structure or building
erected thereon. Where existing streets or utilities are at elevations which
make strict compliance with this provision impractical, the City council may
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ORDINANCE NO. 483 - continued 3
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authorize use of flood proofing or other measures or methods to provide y
protection to the flood protection elevation.
3.04 Commercial Areas. Commercial Buildings or structures
generally are to be constructed on fill with no first floor or basement
floor below the flood protection elevation, or otherwise flood proofed
to the flood protection elevation. Accessory land uses such as yards,
railroad tracks and parking lots may be at lower elevations.
3.05 Manufacturing and Industrial Areas. Manufacturing and
industrial buildings, structures and appurtentant works shall be protected
to the Flood Protection Elevation. Measures shall be taken to minimize
interference with normal plant operations. Certain accessory Jand uses
such as yards, railroad tracks and parking lets may be at lower elevations.
3.06 Storage of Materials. Materials that, in time of flooding. are
buoyant, flammable, explosive, or could be injurious to human, animal or
plant life. shall be stored at or above the flood protection elevation,
flood proofed. or protected by structural measures consistent with the
standards set forth herein. Furthermore, storage of materials likely to
cause pollution of the waters, as defined in Minnesota Statutes 1969.
Paragraph 115.01, if subject to flooding are prohibited unless adequate
safeguards approved by the Minnesota Pollution control Agency are provided.
Section 4. Administration. A11 requests for Building Permits in
the Flood Plain Overlay District shall be referred to the City Engineer
for review to determine if plans are in compliance with the Ordinance.
Section 3. Effective Date. This Ordinance shall be in full force and
effect from and after its passage and publication according to law.
Passed by the City Council this 7th day of December. 1971.
Published: December 13. 1971.
Attest:
ty Clerk -Coordinator
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�)i,:eer
Mayor
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