[R.O. 1998 § 410.010; Ord. No. 2935[1] §1, 1-5-2015]
The Legislature of the State of Missouri
has in Section 79.110, RSMo. delegated the responsibility to local
governmental units to adopt floodplain management regulations designed
to protect the health, safety, and general welfare. Therefore, the
Board of Aldermen of the City of St. Ann, Missouri, ordains as follows.
[1]
Editor's Note: This ordinance also repealed
former Ch. 410, Flood Damage Prevention and Control, adopted 7-7-2003
by §1 of Ord. No. 2295.
[R.O. 1998 § 410.020; Ord. No. 2935 §1, 1-5-2015]
A.
Flood Losses Resulting From Periodic Inundation.
The special flood hazard areas of the City of St. Ann, Missouri, are
subject to inundation which results in loss of life and property,
health and safety hazards, disruption of commerce and governmental
services, extraordinary public expenditures for flood protection and
relief, and impairment of the tax base, all of which adversely affect
the public health, safety and general welfare.
B.
General Causes Of The Flood Losses. These
flood losses are caused by the cumulative effect of development in
any delineated floodplain causing increases in flood heights and velocities;
and the occupancy of flood hazard areas by uses vulnerable to floods,
hazardous to others, inadequately elevated, or otherwise unprotected
from flood damages.
C.
Methods Used To Analyze Flood Hazards.
The Flood Insurance Study (FIS) that is the basis of this Chapter
uses a standard engineering method of analyzing flood hazards which
consists of a series of interrelated steps.
1.
Selection of a base flood that 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 base flood selected for
this Chapter is representative of large floods which are characteristic
of what can be expected to occur on the particular streams subject
to this Chapter. It is the general order of a flood which could be
expected to have a one-percent chance of occurrence in any one (1)
year as delineated on the Federal Insurance Administrator's FIS, and
illustrative materials for St. Louis County dated February 4, 2015,
as amended, and any future revisions thereto.
2.
Calculation of water surface profiles
are based on a standard hydraulic engineering analysis of the capacity
of the stream channel and overbank areas to convey the regulatory
flood.
[R.O. 1998 § 410.030; Ord. No. 2935 §1, 1-5-2015]
A.
It is the purpose of this Chapter to promote the public health, safety, and general welfare; to minimize those losses described in Article I, Section 410.020(A); to establish or maintain the community's eligibility for participation in the National Flood Insurance Program (NFIP) as defined in 44 Code of Federal Regulations (CFR) 59.22(a)(3); and to meet the requirements of 44 CFR 60.3(c) by applying the provisions of this Chapter to:
1.
Restrict or prohibit uses that are
dangerous to health, safety, or property in times of flooding or cause
undue increases in flood heights or velocities.
2.
Require that uses vulnerable to floods,
including public facilities that serve such uses, be provided with
flood protection at the time of initial construction.
3.
Protect individuals from buying lands
that are unsuited for the intended development purposes due to the
flood hazard.
