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74. WITTMANN AREA DRAINAGE MASTER STUDY/PLAN UPDATE – CHANGE ORDER NO. 4 (Supervisorial District: 4) Approve Change Order No. 4 to extend the contract end date by 485 days from 9/30/2026 to 01/28/2028 and add the amount of $300,000.00 to the contract which will allow Black & Veatch Corporation (consultant) to complete the remaining work for the Wittmann Area Drainage Master Study/Plan (ADMS/P) Update (STUDY). The delay and additional costs are attributed to issues with Light Detection and Ranging (LiDAR) mapping, modeling adjustments, and revised model deliverables. The Wittmann ADMS/P Update will use updated mapping and modeling to identify the current flood hazards and risks, communicate these risks and hazards to the public and stakeholders, and provide recommendations for structural and non-structural solutions to reduce the flood risks and impacts due to flooding for the residents, community, and stakeholders within the study area. The study area is approximately 310 square miles and is located within the Cities of Surprise and Peoria, unincorporated Maricopa County, and a small portion in the City of Buckeye. (C-69-20-017-5-01)

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