The legislature of the State of Missouri
has in Section 77.260, RSMo., delegated the responsibility to local
governmental units to adopt floodplain management regulations designed
to protect the health, safety, and general welfare. Therefore, the
City Council of the City of Washington, Missouri ordains as follows.
[1]
Editor's Note: This ordinance also repealed
the prior Flood Damage Prevention Regulations, adopted 9-19-2011 by
Ord. No. 11-10882 and included in the Code as Ch. 495.
[R.O. 1992 § 415.015; Ord. No. 16-11557, 8-15-2016, effective 3-1-2017]
A.
Flood Losses Resulting From Periodic Inundation.
The special flood hazard areas of the City of Washington, Missouri
(hereinafter referred to as "the City") 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:
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
consist 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 in 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 Franklin County, Missouri, dated
June 5, 2020, as amended, and any future revisions thereto.
[Ord. No. 18-11890, 8-6-2018; Ord. No.
20-13051, 2-3-2020]
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.
3.
Computation of a floodway required
to convey this flood without increasing flood heights more than one
(1) foot at any point.
4.
Delineation of floodway encroachment
lines within which no development is permitted that would cause any
increase in flood height.
5.
Delineation of flood-fringe, i.e.,
that area outside the floodway encroachment lines, but still subject
to inundation by the base flood.
[R.O. 1992 § 415.020; Ord. No. 16-11557, 8-15-2016, effective 3-1-2017]
A.
Purpose. 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 415.015(A); to establish or maintain the City's eligibility for participation in the National Flood Insurance Program (NFIP) as defined in 44 CFR 59.22(a)(3); and to meet the requirements of 44 CFR 60.3(d) 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 uses vulnerable to floods,
including public facilities that serve such uses, to be provided with
flood protection at the time of initial construction; and
3.
Protect individuals from buying lands
that are unsuited for the intended development purposes due to the
flood hazard.
