PC 04/13/83 - Laserfiche WebLink

PLANNING COMMISSION Page 11 4/13/83 Commissioner Jamieson agreed with the statements of Commissioners Getty and Wilson and supported the soundwall on the property line. He indicated the type of construction of the soundwall can be worked out at a later date. He asked when the soundwall would be built. Mr. Harris stated that the Commission could condition it any way they wished. Commissioner Jamieson felt that the soundwall on Kolln Street should be built as quickly as possible. Commissioner Wilson had a question as to whether it should be 6', 10' or some other height and wondered whether or not one of the acoustical people present could address the issue. Commissioner Getty indicated that Mr. Gates study was a 6' wall. Mr. Martin indicated that Mr. Ed Pack is the consultant who did the work on the Kolln Street matter as well as the analysis on Valley Avenue. He stated there has not been a full-blown acoustical analysis for Kolln Street because according to Mr. Pack's calculations the noise level would not exceed the City's standards. He said Mr. Pack did write a letter which he has in his files that it is the opinion of Mr. Pack that the acoustical level was in the mid 50db at build out and that a 6' fence would be effectively higher because of the grade and would decrease the db level by 6db. Mr. Martin stated that the concrete 6' soundwall would cost a substantial amount and using standard panel would cost about $23/foot. As the wall gets higher, it gets increasingly higher and a 10' wall would be about $50/foot. He said a 10' wall chainlink, with slats would cost $24/foot. He said the problem with a 10' wall built solid is with regard to wind loading. He said that structural system would dramatically increase the cost. Commissioner Wilson then asked Mr. Martin to show on the diagrams the exact location of the soundwalls. Mr. Martin reviewed the locations. Chairperson Lindsey had concerns with putting any type of fence 27' from the property line of the residences on Kolln Street because of security and other reasons. The public hearing was closed. A motion was made by Commissioner Getty, seconded by Commissioner Jamieson that the mitigated negative declaration prepared for the modification to case PUD-79-13 be recommended for approval inasmuch as conditions imposed in project approval would reduce any significant impacts to an insignificant level.