Agenda - Council - 04/09/2024 - Laserfiche WebLink

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nEs www.ae2s.coni 015 Field Order No.4-Door $101922.45 y Approved— Hardware Changes Construction Contingency Expense 3 016 Door Hardware Changes $561724.85 y Approved— Construction Contingency Expense 3 017 012 Filter Slab Modifications $96,634.23 y Pending— Construction Contingency Expense 4 018 Conduit Encasement $5,389.13 y Pending— Construction Contingency Expense 4 Note:Any extension delays will be approved as a separate Change Order and will not be included in this Construction Contingency Expense. Proposal No. 017(RFP 012): Filter Slab Modifications: During construction and submittal review,the Contractor and structural engineer identified some concerns with the constructability of the beams within the Backwash Reclaim Tank and Clearwell that support the filter slabs above. Upon further review, the structural engineer concluded that additional support features should be included to increase the factor of safety of the beams. This included increasing the size of the 241)9x24"beams to 24"x52", thickening the filter slab supporting the underdrain and media, and extending that slab across all three filters (see the attached RFP No. 012 for changes). This change will increase the load capabilities of the filter slab and improve the overall structural design to be more resilient. The change increased the required steel by approximately 28,000 pounds and concrete by approximately 75 cubic yards. AE2S has worked with the contractor to review the required changes and determine a reasonable price to make these adjustments. The attached proposal reflects the Contractor's associated costs for these modifications. Included with the proposal is a request for a 10-day extension to account for installation and material lead times as a result of this change. The Contractor has agreed to reassess this request once installation is completed. AE2S requests that the City work to approve this change in a timely manner to reduce impacts to the construction schedule and lead times for materials added. Proposal No. 018: Conduit Encasement: To ensure that unexpected settlement under the Backwash Reclaim Tank will not occur,the Contractor was directed to cast-in-place all buried conduit that was to be installed under the tank base slab. The proposal reflects the Contractor's associated costs for these modifications. Summary of General Construction Continency Costs: AE2S has summarized all known construction contingency expenses at this time in order to help the City of Ramsey better understand the current contingency status. As Construction progresses, AE2S will continue to provide cost updates and coordinate with City staff. General Construction Contingency Amount Expense No. Original Contingency: $950 000.00 Expense No. 1 $761446.53 Expense No.2 $135,654.02 Expense No. 3 $99,095.63 Expense No.4 $1021023.36 Net Expenses to Date: $4139219.54 Available Construction Contingency= $5369780.46 Advanced Engineering and Environmental Services, Inc. 6901 East Fish Lake Road, Suite 184 • Water Tower Place Business Center • Maple Grove, MN 55369 • 763-463-5036