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Rev. 02/07
operation during times of flooding;
(6) All new construction or any substantial improvement of any residential structure shall
have the lowest floor, including all utilities, ductwork and any basement, at an
elevation at —least one foot above the Base Flood Elevation. Certification that the
applicable standards have been satisfied shall be submitted to the Administrator,
said certification shall bear the dated seal and signature of a registered professional
engineer or registered professional land surveyor on the form provided by the
Administrator;
All new construction or any substantial improvement of any commercial, industrial, or
other non - residential structure shall either have the lowest floor, including all utilities,
ductwork and basements, elevated at least one foot above the Base Flood Elevation, or
the structure with its attendant utility, ductwork, basement and sanitary facilities shall be
flood - proofed so that the structure and utilities, ductwork, basement and sanitary facilities
shall be watertight and impermeable to the intrusion of water in all areas below the Base
Flood Elevation, and shall resist the structural loads and buoyancy effects from the
hydrostatic and hydrodynamic conditions. Certification that the applicable standards have
been satisfied shall bear the dated seal and signature of a registered professional
engineer on the form provided by the Administrator;
For all new construction and substantial improvements, fully enclosed areas below the
lowest floor that are used solely for parking of vehicles, building access or storage in an
area other than a basement and that are subject to flooding shall be designed to
automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry
and exit of floodwaters. Designs for meeting this requirement must either be certified by a
registered professional engineer or architect or must meet or exceed the following
minimum criteria: A minimum of two openings having a total net area of not less than one
square inch for every square foot of enclosed area subject to flooding shall be provided.
The bottom of all openings shall be no higher than one foot above grade. Openings may
be equipped with screens, louvers, or other coverings or devices provided that they permit
the automatic entry and exit of floodwaters;
In areas of special flood hazard where Base Flood Elevations have not been established,
Base Flood Elevation data shall be generated for subdivision proposals and other
proposed development, including manufactured home parks, which are greater than 50
lots or 5 acres, whichever is less.
(10) In A1-30, AH, and AE Zones [or areas of special hazard], all recreational vehicles to be
placed on a site must (i) be elevated and anchored; and (ii) be on the site for less than
180 consecutive days; and (iii) be fully licensed and highway ready.
(11) (a) Any new construction, substantial improvement to a structure or fill that encroaches
into the Special Flood Hazard Area shall be prohibited unless it can be demonstrated that
same will have no adverse impacts as set forth below. Certification of this shall be
required as approved by the Administrator based upon a submitted engineering report
that includes hydrologic and hydraulic analysis which conform to the requirements of this
Chapter and the BryanlCollege Station Unified Design Guidelines, Standard Details, and
Technical Specifications. All submitted information required herein shall bear the dated
seal and signature of a registered professional engineer:
(1) The engineering report shall demonstrate that such construction,
improvement or fill creating the encroachment does not, at any time, cause
any of the following upstream, within, near, adjacent, or downstream of
such encroachment:
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