Portland City Code ch. 14 (Land Use Code)

Citation: Portland City Code ch. 14 (Land Use Code)
Jurisdiction: Portland (municipal)
Source: Official source
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right-of-way, public open space, or residential D. Sound levels shall be measured with a sound
zone. level meter with a frequency weighting network
manufactured according to standards
TABLE 6-H: NOISE STANDARDS
prescribed by the American National Standards
Daytime/Evening Night
Institute (ANSI) or its successor body.
Zone (7 a.m.-9 p.m.) (9 p.m.-7 a.m.)
E. Wind energy systems. Where the underlying
I-B 60 dBA 55 dBA zone is residential and does not specify sound
O 60 dBA 60 dBA requirements, or where the system will be
B-1 55 dBA 55 dBA within 100 feet of a residential zone, sound
B-2/B-2b 60 dBA 55 dBA generated by the wind energy system shall not
B-3 60 dBA 55 dBA exceed 45 decibels on the A scale between the
B-4 65 dBA 60 dBA hours of 9:00 p.m. and 7:00 a.m., and 50
B-5, B-6 60 dBA 50 dBA decibels on the A scale between 7:00 a.m. and
TOD-1/TOD-2 60 dbA 55 dbA 9:00 p.m., as measured at the nearest property
I-L/I-Lb 60 dBA 50 dBA line in accordance with this provision and
I-M/I-Mb 70 dBA 55 dBA
technical standards set out in the City of
Portland Technical Manual. Audible sound
I-H 75 dBA 55 dBA
levels of wind energy systems shall include
A-B 60 dBA 60 dBA
sounds generated in all conditions including
low and high winds (furling, yawing, and flutter)
6.8.6 Noise
and power outages (freewheeling).
A. No use shall be operated so as to generate
F. Exemptions
recurring noises that are unreasonably loud,
1. Noises created by construction and
cause injury, or create a nuisance to any person
maintenance activities between 7:00 a.m.
of ordinary sensitivities.
and 9:00 p.m. are exempt from the
B. The maximum permissible sound level of any
maximum permissible sound levels set
continuous, regular, or frequent source of
forth in Table 6-H.
sound produced by an activity shall be as
2.