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83. CHANGE ORDER NO. 7 FOR CAVE BUTTES DAM MODIFICATION DESIGN AND ENGINEERING SUPPORT DURING CONSTRUCTION Approve Change Order (CO) No. 7 to the Flood Control District of Maricopa County (District) Contract FCD 2009C027 – Cave Buttes Dam Modification Design and Engineering Support During Construction (On-Call) with URS Corporation (URS) in the amount of $500,000.00 for a revised contract value of $3,600,000.00 and a contract duration increase of 730 days with a new end date of June 30, 2023. Construction completion is anticipated in June 2021. Change Order No. 7 provides additional contract time and funds necessary to complete required project closeout activities and documentation including: as-built plans and specifications, construction completion report, Gate Operations Manual/Water Control Plan, and resolution of all remaining technical items with the US Army Corps of Engineers (USACE) and Arizona Department of Water Resources (ADWR) in order to close out the USACE 408 Permission and ADWR Permit associated with the project. The additional contract funds and time have been conservatively estimated in consideration of the USACE and ADWR involvement on this project inclusive of the ongoing “gate redundancy” issue with the USACE. Agency response times and issue resolution are difficult to estimate and can significantly impact schedule and cost. This Agenda Item impacts Supervisorial District 3. (C-69-15-005-5-01)

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