HomeMy WebLinkAbout(1990, 02/12) - L-12 - AmendedL -12
SOUND ATTENUATION WALLS
Sound attenuation walls may be required as part of the environmental
process related to street improvement projects, may be required as
mitigations for development projects causing significant traffic increases,
or may be required in new development projects to mitigate noise impacts
identified in environmental studies. It is the intent of this policy that
such walls be designed in an esthetically pleasing manner, pursuant to the
standards outlined below.
New sound attenuation walls shall ordinarily be constructed with slump
stone, split face concrete block, plaster or stucco surfaced block, or
specially finished concrete. For locations where the new wall will be
integrated with existing walls, the new wall shall match existing walls if
the specified degree of sound attenuation can be provided. Replacement of
existing landscaping disturbed by wall construction shall be included in
the wall projects.
An alignment incorporating staggered or offset panels may be utilized where
adequate right of way exists, or additional space can be provided on
private property. Standard roadway widths, sidewalk widths, and bicycle
trail widths shall not be reduced in order to provide additional space for
a staggered wall alignment.
Upgrading of materials, design, or landscaping is encouraged and may be
included in the project if adequate funding can be provided.
Sound attenuation walls which are constructed in new development projects
shall provide for generous landscaped setbacks, and shall incorporate
materials and design features which will enhance the esthetic
characteristics of the wall. Design concepts shall emphasize preservation
of public views, consistent with providing the required sound attenuation.
Adopted - February 10, 1986
Amended - February 12, 1990