The Gilbert-Chandler ADMS/P Update will identify and characterize existing drainage, flooding sources, and flooding hazards within the study area primarily due to land use changes, previous study age, hydrologic methods, modern mapping technologies, and population growth within the watershed. This includes two primary project goals: the development of a comprehensive, detailed, multi-frequency FLO-2D model for the study area, and a flood hazard assessment. Major tasks will include a compilation of the data collection results with the 2D model output to identify, quantify, and qualitatively describe significant drainage and flooding issues. Other supporting tasks include data collection, supplemental field surveys (as needed), public outreach, and stakeholder coordination. Tasks may also include evaluation of past flood mitigation alternatives within the study area and updating of the original Area Drainage Master Plan as necessary, or recommendation of a revised Area Drainage Master Plan for the area with newly identified possible alternatives and a conceptual design (15% plan development and associated cost estimate) of selected alternatives. The study area covers approximately 152 square miles in southeastern Maricopa County within the Town of Gilbert, the City of Chandler, the City of Mesa, the Gila River Indian Community, and unincorporated Maricopa County areas. Question Deadline 10/05/2023 at 2:00 PM MT
The estimated contract value will be between $1,000,000.00 and $1,200,000.00. The contract period is expected to be 730 calendar days from the Notice to Proceed with possible extensions to Final Completion. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.
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