The following standards apply to new development, including new and substantially improved structures, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in §
72-6:
A. Subdivision proposals. The following standards apply
to all new subdivision proposals and other proposed development in
areas of special flood hazard (including proposals for manufactured
home and recreational vehicle parks and subdivisions):
(1) Proposals shall be consistent with the need to minimize
flood damage.
(2) Public utilities and facilities such as sewer, gas,
electrical and water systems shall be located and constructed so as
to minimize flood damage.
(3) Adequate drainage shall be provided to reduce exposure
to flood damage.
B. Encroachments.
[Amended 9-14-2016 by L.L. No. 5-2016]
(1) Within Zones A1-A30 and AE, on streams without a regulatory floodway,
no new construction, substantial improvements or other development
(including fill) shall be permitted unless:
(a)
The applicant demonstrates that the cumulative effect of the
proposed development, when combined with all other existing and anticipated
development, will not increase the water surface elevation of the
base flood more than one foot at any location; or
(b)
The Town of Manlius agrees to apply to the Federal Emergency
Management Agency (FEMA) for a conditional FIRM revision, FEMA approval
is received and the applicant provides all necessary data, analyses
and mapping and reimburses the Town of Manlius for all fees and other
costs in relation to the application. The applicant must also provide
all data, analyses and mapping and reimburse the Town of Manlius for
all costs related to the final map revision.
(2) On streams with a regulatory floodway, as shown on the Flood Boundary and Floodway Map or the Flood Insurance Rate Map adopted in §
72-6, no new construction, substantial improvements or other development in the floodway (including fill) shall be permitted unless:
(a)
A technical evaluation by a licensed professional engineer demonstrates
through hydrologic and hydraulic analyses performed in accordance
with standard engineering practice that such an encroachment shall
not result in any increase in flood levels during occurrence of the
base flood; or
(b)
The Town of Manlius agrees to apply to the Federal Emergency
Management Agency (FEMA) for a conditional FIRM and floodway revision,
FEMA approval is received and the applicant provides all necessary
data, analyses and mapping and reimburses the Town of Manlius for
all fees and other costs in relation to the application. The applicant
must also provide all data, analyses and mapping and reimburse the
Town of Manlius for all costs related to the final map revisions.
(3) In Zones A1-A30, AE and AH, and also Zone A if base flood elevation
data are available, if any development is found to increase or decrease
base flood elevations, the Town of Manlius shall as soon as practicable,
but not later than six months after the date such information becomes
available, notify FEMA and the New York State Department of Environmental
Conservation of the changes by submitting technical or scientific
data in accordance with standard engineering practice.
The following standards, in addition to the standards in §
72-14A, Subdivision proposals, and §
72-14B, Encroachments, and §
72-15, Standards for all structures, apply to structures located in areas of special flood hazard as indicated:
A. Within Zones A1-A30, AE and AH and also Zone A if base flood elevation
data are available, new construction and substantial improvements
shall have the lowest floor (including basement) elevated to or above
two feet above the base flood elevation.
[Amended 9-14-2016 by L.L. No. 5-2016]
B. Within Zone A, when no base flood elevation data is
available, new and substantially improved structures shall have the
lowest floor (including basement) elevated at least three feet above
the highest adjacent grade.
C. Within Zone AO, new and substantially improved structures shall have the lowest floor (including basement) elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community's Flood Insurance Rate Map enumerated in §
72-6 (at least two feet if no depth number is specified).
D. Within Zones AH and AO, adequate drainage paths are
required to guide floodwaters around and away from proposed structures
on slopes.
The following standards apply to new and substantially improved commercial, industrial and other nonresidential structures, in addition to the requirements in §
72-14A, Subdivision proposals, and §
72-14B, Encroachments, and §
72-15, Standards for all structures.
A. Within Zones A1-A30, AE and AH, and also Zone A if base flood elevation
data are available, new construction and substantial improvements
of any nonresidential structure shall either:
(1) Have the lowest floor, including basement or cellar, elevated to
or above two feet above the base flood elevation; or
(2) Be floodproofed so that the structure is watertight below two feet
above the base flood elevation, including attendant utility and sanitary
facilities, with walls substantially impermeable to the passage of
water. All structural components located below the base flood level
must be capable of resisting hydrostatic and hydrodynamic loads and
the effects of buoyancy.
B. Within Zone AO, new construction and substantial improvements
of nonresidential structures shall:
(1) Have the lowest floor (including basement) elevated
above the highest adjacent grade at least as high as the depth number
specified in feet on the community's FIRM (at least two feet if no
depth number is specified); or
(2) Together with attendant utility and sanitary facilities, be completely floodproofed to that level to meet the floodproofing standard specified in Subsection
A(2).
C. If the structure is to be floodproofed, a licensed professional engineer or architect shall develop and/or review structural design, specifications and plans for construction. A floodproofing certificate or other certification shall be provided to the local administrator that certifies that the design and methods of construction are in accordance with accepted standards of practice for meeting the provisions of Subsection
A(2), including the specific elevation (in relation to mean sea level) to which the structure is to be floodproofed.
D. Within Zones AH and AO, adequate drainage paths are
required to guide floodwaters around and away from proposed structures
on slopes.
E. Within Zone A, when no base flood elevation data is
available, the lowest floor (including basement) shall be elevated
at least three feet above the highest adjacent grade.
The following standards, in addition to the standards in §
72-14, General standards, and §
72-15, Standards for all structures, apply, as indicated, in areas of special flood hazard to manufactured homes and to recreational vehicles which are located in areas of special flood hazard.
A. Recreational vehicles.
(1) Recreational vehicles placed on sites within Zones
A1-A30, AE and AH shall either:
(a)
Be on site fewer than 180 consecutive days;
(b)
Be fully licensed and ready for highway use;
or
(c)
Meet the requirements for manufactured homes in Subsections
B,
D and E.
(2) A recreational vehicle is ready for highway use if
it is on its wheels or jacking system, is attached to the site only
by quick-disconnect-type utilities and security devices and has no
permanently attached additions.
B. A manufactured home that is placed or substantially improved in Zones
A1-A30, AE and AH shall be elevated on a permanent foundation such
that the lowest floor is elevated to or above two feet above the base
flood elevation and is securely anchored to an adequately anchored
foundation system to resist flotation, collapse and lateral movement.
[Amended 9-14-2016 by L.L. No. 5-2016]
C. Within Zone A, when no base flood elevation data is available, new
and substantially improved manufactured homes shall be elevated such
that manufactured home chassis is supported by reinforced piers or
other foundation elements of at least equivalent strength that are
no less than 36 inches in height above the lowest adjacent grand and
are securely anchored to an adequately anchored foundation system
to resist flotation, collapse or lateral movement. Elevation on piers
consisting of dry stacked blocks is prohibited.
[Amended 9-14-2016 by L.L. No. 5-2016]
D. Within Zone AO, the floor shall be elevated above the highest adjacent
grade at least as high as two feet above the depth number specified
on the Flood Insurance Rate Map enumerated in § 128-6 (at
least two feet if no depth number is specified).
[Amended 9-14-2016 by L.L. No. 5-2016]
[Added 9-14-2016 by L.L.
No. 5-2016]
The following standards apply to new and substantially improved accessory structures, including detached garages, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in §
72-6.
A. Within Zones A1-A30, AE, AO, AH, A, accessory structures must meet the standards of §
72-15A, Anchoring,
B. Within Zones A1-A30, AE and AH, and also Zone A if base flood elevation
data are available, areas below two feet above the base flood elevation
shall be constructed using methods and practices that minimize flood
damage.
C. Within Zones AO, or Zone A if base flood elevation data are not available,
areas below three feet above the highest adjacent grade shall be constructed
using methods and practices that minimize flood damage.
D. Structures must be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters in accordance with §
72-15B(3).
E. Utilities must meet the requirements of §
72-15C, Utilities.