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• Our measurement technique also utilizes a depth finder attached to the kayak ◦Depending on when in the year the bathymetric data is collected, the sonar returns from vegetation can cloud the dataset; sonar data will be collected and further vetted for accuracy as digital surface datasets are compiled • Using AutoCAD tools, the collected data will be converted and compiled in a digital format ◦Surface models will be created to simply quantify the total accumulated volume; these models are also provided to the contractor, should they use automated equipment for sediment removal • For dry, or very shallow (less than two feet) ponds, traditional topographic survey methods will be used An electronic base map will be created and submitted to the city for review prior to initiating design work based on the field, aerial, and bathymetric surveys. It is assumed that no easement exhibits will be required for the project. If through the feasibility report, it is determined that work around storm aprons is required and/or access through easements from the street down to the lake is required, additional topographic survey would be required to shoot the entire easement corridor from house to house. This work is not included in our proposal but can be added for an additional fee at the time of authorizing final design. TASK 4: GEOTECHNICAL EVALUATION COORDINATION We have solicited a proposal from Braun Intertec on behalf of the city for geotechnical evaluation services on this project. It is assumed that geotechnical services will be provided by Braun for the project under a separate contract directly with the City of Arden Hills. Geotechnical services will include preliminary materials investigations by completing pavement cores and shallow borings throughout the proposed street and trail project corridors to provide recommendations on the proposed street improvements and utility construction. Additionally, Braun will conduct pond sediment sampling, testing, and analysis consistent with MPCA standards (Managing Dredge Materials Best Management Practice Guidance) at the five identified storm outlet locations to determine the MPCA management level necessary for landfilling of the excavated material generated from dredging the lake deltas. A geotechnical report will be developed with a summary of findings, including the recommended street improvements with proposed street section, bituminous mix designs, and other relevant construction recommendations. Braun has extensive experience performing these preliminary materials investigation tasks on other projects. They have worked with the City of Arden Hills on several recent projects and are well-versed in the city’s expectations. A full scope of services and assumptions from Braun is included in their proposal. The fee for this task includes Bolton & Menk’s work to coordinate the geotechnical evaluation with Braun, review the results, and provide recommendations for implementation of the results into the project’s proposed improvements. TASK 5: PUBLIC ENGAGEMENT Effective, consistent public engagement is a key component to the overall success of any project. Bolton & Menk’s extensive communications capabilities allow us to provide you with a tailored approach to engagement that is organized, efficient, and proactive. Bolton & Menk will engage the public and provide a forum for valuable project discussion. We will work with city staff to send out a letter with preliminary project information notifying residents of the upcoming project and directing them to take an online survey/questionnaire to identify key project issues and concerns from residents and businesses during the feasibility phase of the project. This information will be incorporated in the feasibility report. We will conduct an open-house style public informational meeting during the final design of construction plans to inform residents of the proposed improvements. We will solicit comments and input from residents. These comments will be discussed with city staff and incorporated into the project design, as directed. 10 2026 PMP STREET AND UTILITY IMPROVEMENTS | CITY OF ARDEN HILLSWorK Plan and Project aPProach EXHIBIT A