This memorandum supersedes the design memorandum issued on January 14, 2012 for Type 11 Precast Concrete Noise Barrier Wall on Shaft Foundation. The January 14, 2012 policy memorandum remains effective for all other types of noise barrier walls until further notice.   read more....

"Standard Plan Noise Wall Type 11 Details"...   see more....

If you have any questions regarding these issues, please contact David Sawahata at 360-705-6491, Monique Pawelka at 360-705- 7754, or Bijan Khaleghi at 360-705-7181.

cc:   Mark Gaines, Bridge Construction - 47354