Series 106 2005 ORDINANCES/RESOLUTIONS
Section 106-113; Ord. 18432; Amending Chapter 29 of the City Code as it relates to the floodplain overlay district
Bill No. B 56-05
amending Chapter 29 of the City Code as it relates to the floodplain overlay district;
the time when this ordinance shall become effective.
BE IT ORDAINED BY THE COUNCIL OF THE CITY OF COLUMBIA, MISSOURI, AS
SECTION 1. Chapter 29 of the Code of Ordinances of the
City of Columbia, Missouri, is
hereby amended as follows:
Material to be deleted in
strikeout; material to be added underlined.
Sec. 29-22. District F-1, floodplain overlay district.
Authority, findings of fact and purposes.
. . .
Findings of fact.
. . .
c. Methods used to analyze flood hazards. This section uses a
reasonable method of analyzing
flood hazards which consists of the following series of interrelated steps:
1. Selection of regulatory flood
which is based upon engineering calculations which permit
a consideration of such flood factors as its expected frequency of occurrence, the area inundated,
and the depth of inundation. The regulatory flood selected for this section is representative of
large floods which are reasonably characteristic of what can be expected to occur on the
particular streams subject to this section. It is in the general order of a flood which could be
expected to have a one (1) per cent chance of occurrence in any one (1) year, as delineated
the Federal Insurance Administration's Flood Insurance Study, and illustrative materials dated
December 1, 1981 August 16, 1995, as amended, and any future revisions thereto.
. . .
Lands to which ordinance applies. This section shall apply to all lands within the
jurisdiction of the City of Columbia identified on the flood insurance rate map (FIRM) as
numbered and unnumbered A zones (including AE, AO and AH zones) dated August 16, 1995 as
amended and any future revisions thereto, and that portion of the B zone which is in the upper
square mile of a flood drainage area. In all areas covered by this section, no development shall be
permitted except upon the issuance of a floodplain permit to develop granted by the director of
public works under such safeguards and restriction as the director of public works may
reasonably impose for the promotion and maintenance of the general welfare and health of the
inhabitants of the community and where specifically noted in this section.
. . .
. . .
a. The director of public works is hereby appointed to administer
and implement the provisions
of this section.
b. Duties of the director of public works shall include, but
not be limited to:
. . .
4. Notify adjacent communities,
the State of Missouri Emergency Management Agency, the
Missouri Clean Water Commission, and the Department of Natural Resources prior to any
alteration or relocation of a watercourse, and shall submit evidence of such notification to the
Federal Emergency Management Agency.
. . .
7. Verify, record and maintain record of the actual elevation
(in relation to mean sea level) to
which the new or substantially improved
non-residential structures have been floodproofed.
8. When floodproofing is utilized for a particular
non-residential structure, the director of
public works shall be presented certification from a registered professional engineer or architect.
. . .
Provisions for flood hazard reduction.
. . .
Floodway overlay district.
a. Permitted uses. Only uses having a low flood-damage potential
and not obstructing flood
flows shall be permitted within the floodway district to the extent that they are not prohibited by
any other ordinance. All encroachments, including fill, new construction, substantial
improvements and other developments must be prohibited unless
a no-rise certification
statement by a professional registered engineer or architect is provided. A no-rise
certification statement shall be accompanied by supporting documentation which
shall adequately demonstrate
demonstrating that encroachments shall not result
in any increase in
flood levels during occurrence of the base flood discharge. No use shall increase the flood levels
of the regulatory flood elevation. These uses are subject to the standards of subsection (d). The
following are recommended uses for the floodway district.
. . .
Definitions. Unless specifically defined below, words or phrases used in this section
shall be interpreted so as to give them the meaning they have in common usage and to give this
section its most reasonable application. These definitions are for the purpose of this section only
and may differ from those in section 29-2.
. . .
Development means any man-made change to improved or unimproved real estate, including
but not limited to buildings or other structures, levees, levee systems, mining, dredging, filling,
grading, paving, excavation or drilling operations, or storage of equipment or materials.
. . .
Historic structure means any structure that is:
(1) Listed individually in the National
Register of Historic Places (a listing maintained by
the Department of Interior) or preliminarily determined by the Secretary of the Interior as
meeting the requirements for individual listing on the National Register;
(2) Certified or preliminarily
determined by the Secretary of the Interior as contributing the
historical significance of a registered historic district or a district preliminarily determined by
Secretary to qualify as a registered historic district;
(3) Individually listed on
the Missouri inventory of historic places. a state inventory of
historic places in states with historic preservation programs which have been approved by the
Secretary of the Interior; or
(4) Individually listed on a local inventory of historic places in
communities with historic
preservation programs that have been certified either:
a. By an approved state program as determined by the Secretary of the
b. Directly by the Secretary of the Interior in states without approved
. . .
a walled and roofed building that is principally above ground, as well
manufactured home, and a gas or liquid storage tank that is principally above ground., for
floodplain management purposes, a walled and roofed building, including a gas or liquid storage
tank, that is principally above ground, as well as a manufactured home. Structure, for insurance
purposes, means a walled and roofed building, other than a gas or liquid storage tank, that is
principally above ground and affixed to a permanent site, as well as a manufactured home on a
permanent foundation. For the latter purpose, the term includes a building while in the course
construction, alteration or repair, but does not include building materials or supplies intended for
use in such construction, alteration or repair, unless such materials or supplies are within an
enclosed building on the premises.
. . .
is a grant of relief to a person from the requirements of this
permits construction in a manner otherwise prohibited by this section where specific enforcement
would result in unnecessary hardship a grant of relief by the community from the terms of
floodplain management regulation. Floodplain insurance requirements remain in place for any
varied use or structure and cannot be varied by the community.
. . .
SECTION 2. This ordinance shall be in full force and effect
from and after its passage.
PASSED this 7th day of March, 2005.