Change Order Nos. 10, 11, 12 - WWTP Secondary Treatment Improvements Proj No 114-053 - Thieneman Construction Inc

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INTER -OFFICE MEMORANDUM DEPARTMENT OF PUBLIC WORKS DIVISION OF UTILITIES TO: Members of the Board of Public Works Eric Horvath, Director of Public Works Michael Schmidt, Board of Public Works Attorney FROM. Al Greek, Director of Utilities Jacob M. Klosinski, Assistant City Engineer SUBJECT: Agenda Request Form — Change Order No. 11 Project No. 114-053: Wastewater Treatment Plant Secondary Treatment Improvements DATE: June 6, 2017 The Division of Utilities is requesting the Board of Public Works approval of Change Order No. 11 for Project No, 114-053 Wastewater Treatment Plant Secondary Treatment Improvements. Refer to attached documents for supporting details for work. Change Order No. 11 addresses the following changes: Wall Opening (sawcutting, drilling and demolition) Concrete Gate Pockets and Masonry Patching at Gallery #3 for Final Clarifier 4 & 5 Gates New Aluminum Walkways for Access to Gate Actuators Electrical Relocations Refer to Cost Breakdown Sheet for Line Item Cost Details. Notes: Cost breakdown for "Request for Proposal No. 2" herein described as Change Order No. 11. Approval of Change Order No. 11 with Change Order No. 12 provides cost savings. Original Cost Estimate $41,892.55 - $10,343.00 (reduction) = $31,549.55 Final Cost for Change Order No. 11 = $31,550.00 NET INCREASE FOR CHANGE ORDER NO. 11 ITEMS Original Contract Sum Net change by previously authorized change orders The contract sum prior to this change order By this change order, the project amount increases by The new contract sum including this change order is This Change Order represents a total change of Total change for the entire project Time Extensions resulting from Change Order No. 11. Substantial Completion: Final Completion: $ 31,550.00 $11, 885, 000.00 $ 1,583,684.87 $13,468, 684.87 $ 31,550.00 $13,500,234.87 +0.26% +13.59% +0 days +0 days