Item 19 - Agreements for On-Call Engineering Services

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Project infiltrates dry and wet weather volumes of runoff into the ground for groundwater recharge Provide long term geographically specific rainfall/runoff data for single family residential land uses in the City of Anaheim. Regional BMP Credit Study* I City of Anaheim (2019-2021) 1 Anaheim, CA • Assisted in conceptualizing and developing the framework for implementing a Regional Best Management Practices (BMP) Credit Study The purpose of the study was to arrive at a methodology for both, tracking watershed water quality management plans, and providing a financial model to track "credit generator" projects as they would come online. Project elements included reviewing total watershed quality requirements and the impacts of existing WQMP's on the system, and how they impacted both available credits, future credits, and pricing as credits are purchased and future credit generator systems came online. The deliverables included a template calculation spreadsheet and a detailed presentation for City staff. Project challenges included understanding and working with the City Finance department to determine financial management throughout various City departments, as well as developing the methods and frequency for credit pricing adjustments. Opportunities in the future for the program include the encouragement by the City to deliver additional regional stormwater capture systems that will provide watershed level compliance for public projects, with a pathway to offering credits to private developments. Stormwater Feasibility Studies* I City of Dana Point (2020-2021 1 Dana Point, CA • Development of four individual stormwater feasibility studies at multiple locations throughout the City of Dana Point. Locations studied experienced frequent/historical flooding, temporarily blocked roadways, or impacted private properties. Provided alternatives analysis by generating 1D and 2D models to illustrating causes of flooding. Developed multiple solutions and cost models for each location. Three alternative designs and costing models were prepared for each of the four locations and discussed with City staff. One of the most challenging aspects was working with a private property owner and church to prepare onsite topographic surveys and models to demonstrate the existing flooding patterns and agree on a design remedy. Determined that multiple upstream street catch basins had the ability to be retrofitted to capture runoff upstream and carry it around the project site, thus minimizing surface runoff across the property. Bikepath O,P,Q* I Orange County Public Works (2020-2021) 1 Orange County, CA - Managed the preparation of a multi -mile HEC-RAS study for existing and proposed conditions along the proposed Bikepath O,P,Q project. The project entailed the construction of a paved bikepath along the top banks of Coyote Creek. Two bridge undercrossings were proposed and Artesia Boulevard and Valley View Street that altered the existing concrete channel cross section. Evaluated the undercrossings 1,000 feet upstream and downstream of the bridges for impacts to channel water surface elevations and velocities. Coordinated with Orange County, the Los Angeles County Flood Control Districts, and the Army Corps of Engineers. Challenges included gaining concurrence across the various agencies on the acceptable flow rates to use for the analysis, as well as developing HEC-RAS methodology for the handrailed cantilever solution proposed at one of the undercrossings. Wagon Wheel Creek Rehabilitation I Orange County Parks (2019-2021) 1 Wagon Wheel, CA • Project Manager. Assisted in field walk and condition assessment for a failed stepped wall system. Collected streambed material samples and assisted geomorphological experts in determining sediment transport. Completed short and long term repair plans for failed creek wall system. Completed scour and sediment transport analysis. Coordinated with USACOE and completed required permits. City of Twenty -Nine Palms Specific Plan I City of Twenty -Nine Palms (2020-2021) 1 Twenty -Nine Palms, CA Water Quality Manger engaged in specific planning for future stormwater and sewer services within the City. Predicting future central city development corridor as well as optional future Marine Corps base sewer treatment plant. Analyzed future treatment system capacities. Completed long term stormwater planning for quantity and quality.