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Report Number: N Agenda Section: BRIGHTON Report Date August 17, 2006 the city that works for you Council Meeting Date August 22, 2006 • REQUEST FOR COUNCIL CONSIDERATION ITEM DESCRIPTION: CONSIDERATION OF APPROVAL OF CHANGE ORDER NO. 1 AND PARTIAL PAYMENT NO.3 FOR PROJECT 06-1, NWQ - PHASE I GRADING IMPROVEMENTS DEPARTMENT HEAD'S APPROVAL: G~/ CITY MANAGER'S APPROVAL: No comments to supplement this re o t ments attached Recommendation: To approve Change Order No. 1 in the amount of $404,630.68 and Partial Payment No. 3 in the amount of $427,183.04 for Project 06-1, NWQ - Phase I Grading Improvements. Legislative History: On March 15, 2006, the City Council approved the plans and specifications for City Project 06-1, Northwest Quadrant Redevelopment Phase I Grading Improvements and authorized the advertisement for bids at the same meeting. Bids were received for the project on April 19, 2006, and a contract was awarded to North Pine Aggregate, Inc. on April 25, 2006. This Change Order was discussed at a Council Work Session on July 11, 2006 and a Holddown and Stockpiling Agreement was approved at the August 8, 2006 Council Meeting. Financial Impact: The total amount of Change Order No. 1 is $404,630.68. Please refer to the attached Change Order No. 1 and Payment Voucher No. 3 for details. Explanation: The provisions of the contract with North Pine Aggregate specifies that the City makes a partial payment to the contractor at lease once each month at regular intervals on the basis of the work performed during that preceding month. This partial payment shall not exceed 95 percent of the value of the certified estimate. The Change Order is broken down into five items. The first three items are all related to additional common excavation. At total of 68,849 cubic yards of excavation at a cost of $1.32 per cubic yard was salvaged of which the majority was stockpiled on-site for reuse next year. This is expected to save approximately $400,000 since the earthwork will be reused on-site minimizing the costly importing of off-site granular material. The fourth item relates to the additional miscellaneous debris found on-site. Over 125 truck loads of material had to be specially disposed of. These items included appliances that we were unaware of as the time of the contract award The fifth item, which is the most costly, relates to the additional muck excavation located underneath the footprint of the Midwest Asphalt Stockpile. Due to the size and shape of the stockpile, we were only able to take a few soil borings around the pile during the geotechnical evaluation phase of the project. Based on a limited amount of soil information, we estimated that 20,000 cubic yards of muck would need to be removed. However, now that the stockpile has been removed, the estimated amount of muck has more than doubled. Costs and Funding: All costs for this project will be paid for from land sale proceeds. Grant( M. Wyffe , 'E. Director of Public Works Attachments