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Item 4F Memo Item 4F Page 1 of 2 M E M O R A N D U M (August 4, 2020) To: Shana Yelverton, City Manager From: Rob Cohen, Director of Public Works Subject: Approve an Engineering Services Agreement (ESA) with Halff Associates, Inc. to provide engineering services for the Citywide 2D Rain-on-Mesh hydrologic/hydraulic modeling and floodplain mapping project in the amount of $99,915. Action Requested: Approve an Engineering Services Agreement (ESA) with Halff Associates, Inc. to provide engineering services for the Citywide 2D Rain-on-Mesh hydrologic/hydraulic modeling and floodplain mapping project in the amount of $99,915. Background Information: In recent years, a number of significant drainage issues have been observed within the Kirkwood Branch watershed. Currently there is a study being performed on the Kirkwood Branch that was approved by City Council on August 6, 2019. The proposed Citywide 2D Rain-on-Mesh project will provide floodplain mapping and depth grids beyond the riverine areas of the city. The study will develop conceptual drainage on future Capital Improvement Program projects for flooding hotspot locations based on the results of the modeling and historic flooding locations. The proposed ESA will include new hydrologic and hydraulic modeling needed to make recommendations for improvements to eliminate future flooding, project prioritization, and coordination of high priority flooding locations from the planning level alternatives to provide a more detailed analysis. The services provided under this agreement are necessary to establish a baseline for the 2035 Stormwater Master Plan. Additionally, these services will be used to identify potential drainage basins. This agreement does not include design or engineering, which would be required to move forward with a capital project. Financial Item 4F Page 2 of 2 Considerations: Funding for the Citywide 2D Rain-on-Mesh hydrologic/hydraulic modeling and floodplain mapping project is funded from the Strategic Initiative Fund. This item is within the approved budgeted amount Strategic Link: This item links to the City’s Strategy Map strategic focus areas of Safety & Security, Mobility, and Infrastructure. It specifically relates to the City’s Corporate Objectives, C1: Achieve the Highest Standards Of Safety & Security, C2: Provide Travel Convenience Within City & Region, and F2: Invest to Provide & Maintain High Quality Public Assets. The Critical Business Outcomes are, CB02: Enhance Mobility Through Aggressive Traffic Management Initiatives and Capital Project Implementation, and CB05: Improve Quality of Life Through Progressive Implementation of Southlake’s Comprehensive Plan Recommendations. Citizen Input/ Board Review: None Legal Review: The proposed agreement is a standard agreement that the City Attorney has reviewed and approved. Alternatives: The City Council may approve or deny the agreement. Staff Recommendation: Approve an Engineering Services Agreement (ESA) with Halff Associates, Inc. to provide engineering services for the Citywide 2D Rain-on-Mesh hydrologic/hydraulic modeling and floodplain mapping project in the amount of $99,915. Supporting Documents: Attachment A: Engineering Services Agreement Staff Contact: Rob Cohen, Director of Public Works Steven D. Anderson, P.E., CFM, Deputy City Engineer