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Consulting Services Agreement between City of San Leandro and <br />Haley & Aldrich, Inc. for Design Services for Lake Chabot Road Erosion Repairs <br />Last revised 12/2024 <br />Exhibit A - Page 3A of 5 <br />Task 2 Deliverables: <br />›Geotechnical Design Report <br />TASK 3 – ALTERNATIVES ANALYSIS <br />Task 3.1 -- Topographic Mapping <br />Topographic mapping is essential for developing an accurate basemap showing current contours and 3D models. <br />Haley & Aldrich retains the 2022 basemap for pre- and post-slide analysis. Mapping data will be collected using a <br />LiDAR-equipped drone, and site familiarity may save time by reusing the previous flight path. LCC Engineering & <br />Surveying will incorporate existing data, while the basemap will provide high- resolution 3D models and necessary <br />information for retaining wall configurations. <br />Task 3.2 - Conceptual Designs (3) <br />Developing alternative design concepts will help Haley & Aldrich and the City identify suitable, cost-effective, <br />sustainable approaches. We anticipate the designs to consist of the solutions listed below. The concepts will be <br />incorporated into general plan sheets with enough information for preliminary quantity take-offs and construction cost <br />estimates. <br />> Soldier pile and lagging retaining wall <br />> Shotcrete retaining wall with ground anchors <br />> Pile-supported geogrid-reinforced segmental block retaining wall <br />Task 3.3 - Conceptual Cost Estimates (3) <br />Cost is a key factor in selecting alternatives, especially for government-funded projects. Engineer's estimates of <br />probable construction costs will be prepared based on the general plan sheets to inform analyses of various <br />alternatives. <br />Task 3.4 - Draft Alternatives Memorandum <br />Presenting the conceptual designs and cost estimates in one document will facilitate the City's selection process. The <br />Draft Alternatives Memorandum aims to evaluate the conceptual alternatives so the City can make informed <br />decisions for the next design phase, ranked by cost, risk, maintenance, constructability, and aesthetics. <br />Task 3.5 - Final Alternatives Memorandum <br />The City's feedback on the draft memorandum is vital for delivering a product that meets expectations. The draft will <br />be finalized based on the City's comments and the selected alternative. <br />Task 3 Deliverables: <br />›Drafts Alternatives Memorandum <br />›Final Alternatives Memorandum <br />TASK 4 – PLANS, SPECIFICATIONS, AND ESTIMATE <br />Task 4.1- Calculations <br />Calculations help quantify the dimensions and materials necessary to continue the design process. Engineering <br />calculations will be completed prior to the 60% Plans, Specifications, and Estimate submittal package to support the <br />refinement of the selected conceptual alternative.After the 100% PS&E submittal, final design calculations will be <br />prepared and submitted as a separately bound deliverable. All calculations will be based on the design <br />recommendations and parameters presented in the geotechnical report. <br />Docusign Envelope ID: 5A210297-2C6D-4132-9363-47ABA0868216