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Department Approval lls�kspvi+_J:E REQUEST FOR COUNCIL ACTION Date.- 10/20/08 Item No..- 7.e City Manager Approval Item Description.- Contract for Geotechnical and Environmental Investigations for the Twin Lakes AUAR Subarea I Infrastructure Improvements I BACKGROUND 2 On June 9,, 2008,, the City Council approved a contract with WSB & Associates to complete the design 3 work for the Twin Lakes .UAR Subarea I Infrastructure Improvements. These include.- 4 0 Intersection improvements at County Road C and Cleveland Avenue • Cleveland Ave / 135W ramp and intersection improvements 6 0 Intersection improvements at Fairview and Terrace Drive "7 • Twin Lakes Parkway from Cleveland Ave. to Fairview Ave • Mount Ridge Road from County Road C2 to Twin Lakes Parkway 11, 9 • Prior Avenue south of Twin Lakes Parkway to County Road C II 4w. 0 Municipal utilities including sanitary sewer,, water,, and stormwater. 12 The scope of services for the geotechnical investigation and environmental investigation was undefined 13 at the time of the approval of the contract with WSB. The contract not to exceed cost, $,4�58,036.00, did 14 not include the fees for this work. As described in Section 4.10 of the contract,, WSB will team with I Braun Intertec to perform geotechnical and environmental investigations where needed within the right- 16 of- way. These locations will be identified once preliminary engineering has been completed. Braun I ��7 has already done a substantial amount of investigations in the area, and has a working knowledge of site I conditions. They will supplement this existing body of data with additional site investigations and 19 generate a report that will set the basis for final pavement design and necessary environmental :-) remediation. 2 1 We are now at a stage in the preliminary engineering where we have been able to identify the extent of 22 the geotechnical and environmental investigation necessary for the design of these improvements. 23 Attached is the additional services contract with Braun Intertec to perform these services. 24 POLICY OBJECTIVE 25 The Twin Lakes project has long been identified as a priority for the City. This design work for the 26 Twin Lakes infrastructure is critical in order to keep the overall redevelopment of this area moving 27 forward. Metro Transit is requesting City approvals for the construction of a park-and-ride parking 28 structure along Mount Ridge Road. The geotechnical and environmental investigations are needed for 29 WSB to accurately develop the infrastructure design. Page I of 2