Res 2018-037/approving the Professional Engineering Agreement between the City and Halff Associates Inc. for the Blanco Riverine Community Development Block Grant – Disaster Recovery (CDBG-DR) and Texas Water Development Board (TWDB) Project in the estim

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EXHIBIT I o Stream Assessment of Fluvial Geomorphology: Perform geomorphologic modeling of preliminary design to assess bank stability, erodibility zones, and armoring potential ■ This scope is detailed in the attached proposal from Specialty Devices, Inc. o Right -of -Way Needs Assessment: Identify potential properties to be acquired to implement flood mitigation alternatives. ■ ROW valuation services will be provided as detailed in the attached proposal from HRM Land Acquisition Solutions. o Proiect Benefits and Probable Cost: Quantify benefits of mitigation alternatives and develop concept estimates of probable cost. Short term alternatives will include structure inventory benefit cost analysis based upon inundation in Blanco Gardens. FEMA's Benefit Cost Analysis will be performed on two (2) final alternatives. o Project Ranking: Complete comparison of Project Feasibility Ranking Matrix for long and short-term projects. 5. Conduct Public Open House o Prepare and submit exhibits of proposed mitigation short and long term alternatives o Address city review comments to mitigation alternatives o Review results/feedback of open house with city o Present analysis, and recommendation of short and long-term alternatives to City Council 6. Submit Phase 1 report documenting Phase 1 analysis and Council direction • Task 2 Deliverables: i. Concept Exhibits of proposed mitigation short and long term alternatives ii. Fluvial Stream Assessment Report iii. Environmental Constraints Analysis iv. Project Feasibility Ranking Matrix for long and short-term projects. Task 3: Preliminary Engineering Phase 2 - Schematic Design, Public Meeting, and Environmental Assessment (EA) 1. Preliminary design o Begin preliminary engineering and EA of the selected short-term mitigation alternative 2. Field Investigations o Perform field assessment to determine additional data needs o Conduct Limited Field Surveys (supplement LiDAR, property boundaries, utilities, etc.) o Identify potential utility conflicts based on available record plans o Conduct environmental field investigations 3. Schematic Design Plan o Develop a project base map of the project area including: topography (using new LIDAR supplemented with field survey), utilities, property boundaries, key environmental features, floodplain limits, etc. o Reaffirm floodplain hydraulic analysis with 2D modeling to quantify project benefits and identify potential adverse impacts. o Develop and submit schematic pian and profile of proposed project (including property map with proposed easements/right-of-way needs); ■ Schematics of flood walls will be accomplished as detailed in the attached proposal from Aguirre -Fields, LP. ■ ROW valuation services will be provided as detailed in the attached proposal from HRM Land Acquisition Solutions.