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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jacking system, is attached to the site a regulatory floodway is designated on the
only be quick disconnect type utilities community’s flood insurance rate map or
and security devices, and has no flood boundary and floodway map, unless
permanently attached additions. a technical evaluation certified by a
2. Zones V1-30 and VE shall meet the registered professional engineer is
requirements of either Subsection provided demonstrating that such
12.4.5(I)(1)(a), 12.4.5(I)(1)(b), or 12.4.5(P). encroachments will not result in any
J. Accessory structures. Accessory structures increase in flood levels within the
located within Zones A1-30, AE, AO, AH, and A community during the occurrence of the
shall be exempt from the elevation criteria base flood discharge.
required in Subsection 12.4.5(F) and 12.4.5(G) if 2. In Zones A1-30 and AE riverine areas, for
all other requirements of Subsection 12.4.5 and which no regulatory floodway is
all the following requirements are met. designated, encroachments, including fill,
Accessory structures shall: new construction, substantial
1. Be 500 square feet or less and have a value improvement, and other development shall
less than $3,000. not be permitted in the floodway as
2. Have unfinished interiors and not be used determined in (3) below, unless a technical
for human habitation. evaluation certified by a registered
3. Have hydraulic openings, as specified in professional engineer is provided
Subsection 12.4.5(L), in at least two demonstrating that the cumulative effect
different walls of the accessory structure. of the proposed development, when
4. Be located outside the floodway. combined with all other existing
5. When possible be constructed and placed development and anticipated
on the building site so as to offer the development:
minimum resistance to the flow of flood a. Will not increase the water surface
waters and be placed further from the elevation of the base flood more than
source of flooding than is the primary one foot at any point within the
structure. community.
6. Have only ground fault interrupt electrical b. Is consistent with the technical criteria
outlets. The electric service disconnect contained in Chapter 5 entitled
shall be located above the base flood “Hydraulic Analyses,” Flood Insurance
elevation and when possible outside the Study — Guidelines and Specifications
special flood hazard area. for Study Contractors (FEMA
K. Floodways 37/January 1995, as amended).
1. In Zones A1-30 and AE, encroachments, 3. In Zones A1-30, AE, and A riverine areas for
including fill, new construction, substantial which no regulatory floodway is
improvement, and other development shall designated, the regulatory floodway is
not be permitted in ravine areas, for which determined to be the channel of the river 12-8 | CITY OF PORTLAND LAND USE CODE FLOOD PLAIN MANAGEMENT

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