HomeMy WebLinkAbout(1996, 02/26) - L-10 - AmendedL-IO
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 slumped block, split
face block, plaster or stucco surfaced block, or specially finished concrete, and clear
lexan or laminated glass panels. 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
Reaffirmed - January 24,1994
Amended - February 26,1996
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