Oklahoma Administrative Code › Title 785 - Oklahoma Water Resources Board › Chapter 55 - Development on State Owned or Operated Property Within Floodplains and Floodplain Administrator Accreditation › Subchapter 3 - Development on State Owned or Operated Property Within the Floodplains › Section 785:55-3-2 - Development in the regulatory floodplain with base flood elevations determined

Current through Vol. 41, No. 20, July 1, 2024
(a)
Applicability of section.
In addition to the criteria and requirements set forth in
										785:55-3-1
										and
										785:55-3-4
										herein, all developments within the regulatory floodplain where base flood elevations have been determined
										shall comply with the criteria and requirements of this section.
(b)
Use of base flood elevations.
The Board shall obtain,
										review and utilize any base flood elevation and floodway data available from a federal, state, or other
										source, including data developed pursuant to
										785:55-3-1(g),
										as criteria for requiring that new construction, substantial improvements, or other development in the
										regulatory floodplain meets the requirements of these Rules as applicable.
(c)
Floor and floodproof elevations.
The applicant shall
										obtain and provide the Board with the elevation (in relation to mean sea level) of the lowest floor
										(including basement) of all new and substantially improved structures. If the structure has been floodproofed
										in accordance with (i)(2) and (j) of this section, the applicant shall obtain and provide the Board with the
										elevation (in relation to mean sea level) to which the structure was floodproofed.
(d)
Flood carrying capacity of altered watercourse.
The Board
										shall assure that the flood carrying capacity within the altered or relocated portion of any watercourse is
										maintained.
(e)
Manufactured home installation in
										general.
All manufactured homes which are to be placed within a regulatory floodplain shall be
										installed using methods and practices which minimize flood damage. For the purposes of this requirement,
										manufactured homes must be elevated and anchored to resist flotation, collapse, or lateral movement. Methods
										of anchoring may include, but are not to be limited to, use of over-the-top frame ties to ground anchors.
										This requirement is in addition to applicable state and local anchoring requirements for resisting wind
										forces.
(f)
Manufactured home with permanent
										foundations.
anufactured homes that are placed or substantially improved on sites within a regulatory
										floodplain shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is
										elevated at least one (1) foot above the base flood elevation and be securely anchored to an adequately
										anchored foundation system to resist flotation, collapse and lateral movement where the manufactured home is
										located as follows:
(1) Outside of a manufactured home park or
										subdivision.
(2) In a new manufactured home park or
										subdivision.
(3) In an expansion to an existing manufactured home
										park or subdivision; or
(4) In an existing manufactured home park
										or subdivision on which a manufactured home has incurred "substantial damage" as the result of a
										flood.