Portland City Code ch. 14

Citation: Portland City Code ch. 14
Parent Document: Portland City Code ch. 14
Jurisdiction: Portland (municipal)
Original Source: https://www.portlandmaine.gov/asset/ae8cabd1-66eb-4a1c-9224-92bbca5e792f ↗

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constructed and maintained in such a manner elevation, or together with attendant utility
that no reduction occurs in the flood carrying and sanitary facilities shall:
capacity of the watercourse. a. Be floodproofed to at least two feet
F. Residential. New construction or substantial above the base flood elevation so that
improvement of any residential structure below that elevation the structure is
located within: watertight with walls substantially
1. Zones A1-30, AE, and AH shall have the impermeable to the passage of water.
lowest floor (including basement) elevated b. Have structural components capable
to at least two feet above the base flood of resisting hydrostatic and
elevation. hydrodynamic loads and the effects of
2. Zones AO and AH shall have adequate buoyancy.
drainage paths around structures on c. Be certified by a registered
slopes, to guide flood water away from the professional engineer or architect that
proposed structures. the design and methods of
3. Zone AO shall have the lowest floor construction are in accordance with
(including basement) elevated above the accepted standards of practice for
highest adjacent grade: meeting the provisions of this section.
a. At least two feet higher than the Such certification shall be provided
depth specified in feet on the with the application for a Flood
community’s Flood Insurance Rate Hazard Development Permit, as
Map, or required by Subsection 12.4.2(G) and
b. At least three feet if no depth number shall include a record of the elevation
is specified. above mean sea level to which the
4. Zone A shall have the lowest floor structure is floodproofed.
(including basement) elevated to at least 2. Zones AO and AH shall have adequate drainage paths
two feet above the base flood elevation around structures on slopes, to guide flood water
utilizing information obtained pursuant to away from the proposed structures.
Subsections 12.4.2(D)(2), 12.4.4(B)(4), or 3. Zone AO shall have the lowest floor
12.4.4(C)(1). (including basement) elevated above the
5. Zones V1-30 and VE shall meet the highest adjacent grade:
requirements of Subsection 12.4.5(P). a. At least two feet higher than the
G. Nonresidential. New construction or depth specified in feet on the
substantial improvement of any nonresidential community’s flood insurance rate
structure located within: map, or
1. Zones A1-30, AE, and AH shall have the b. At least three feet if no depth number
lowest floor (including basement) elevated is specified, or
to at least two feet above the base flood c. Together with attendant utility and
sanitary facilities be floodproofed to 12-6 | CITY OF PORTLAND LAND USE CODE FLOOD PLAIN MANAGEMENT

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