Agenda - Council - 06/24/2008 - Laserfiche WebLink

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CASE # UPDATE ON IMPROVEMENT PROJECT #08-27 167TH AVENUE NW REALIGNMENT By: Tim Himmer, Assistant City Engineer Background: On April 8, 2008 City Council authorized staff to prepare plans and specifications for the realignment of 1 67th Avenue NW. As you may recall this realignment related to segment one only (Nowthen Boulevard to Limonite Street). During that meeting staffexpressed interest in expanding the project approximately 500 feet to the west to eliminate the next set of drastic curves along 166th Avenue NW, and subsequently received approval to do so. This expansion of the project was precipitated by a conversation at the December 11,2007 City Council meeting when the resident at 7131 166th Avenue approached the Council during the case to delete segment 3 (Variolite Street to Armstrong Boulevard) from the collector roadway plan. His request was based upon a concern that the roadway alignment (multiple ninety degree curves) would be corrected to the east but nothing would be done at his location, therefore transferring the problem to someone.else. The original overall proposed alignment showed drastic impacts to the home located at 7131 166th Avenue NW, most likely amounting to a total taking of that property. Conversations have been ongoing with the property owner to the south of this lot, at 7100 166th Avenue NW,and they have been very cooperative and open to the idea of right-of-way acquisition on their parcel to permit the roadway to swing southward and allow all existing homes to remain intact. A preliminary plan was advanced showing this southerly swing in the roadway alignment, which reduced the potential taking from 7131 166th Avenue to approximate 3650 SF in the southeast comer of the lot. The impacts of this alignment included the loss of some significant trees and reduced length of driveway. The property owner responded by stating that he would not be in favor to any impacts to his property, and was not supportive of any project that included acquisition from his parcel. Staff began investigating options to eliminate all impacts to this parcel; including reduced design speeds and shifting the curve easterly. The reduced design speed amounts to a curve alignment no better than what currently exists today. The easterly shift begins to encroach on another parcel and drastically impacts the existing wetland. Both homeowners impacted by this easterly shift are open to examining the acquisition process; however impacts to the wetland are inevitable. . Observations: Staff and consultant are in the process of finalizing plans but we are requesting direction on how you would like to proceed with the overall scope of the project. Following are some options to consider: 1. Stay with the proposed alignment, with the easterly shift in the curve, and continue working with the impacted property owners for acquisition. This would result in greater wetland impacts, and most likely higher project costs for mitigation. The State and Watershed are currently reviewing the wetland delineation, and a permit application would be required showing the proposed alignment and impacts. Permit requirements for wetland impacts must show how you could avoid, minimize, or mitigate impacts (in that order). This easterly shift is actually maximizing impacts, and therefore mitigation would \0 -315-