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BOLTON & MENK Real People. Real Solutions. March 24, 2017 City of Orono Attn: Adam Edwards P.O. Box 66 Orono, MN 55232 RE: 2017 Storm Water Assessment Dear Adam: 2638 Shadow Lane Suite 200 Chaska, IVIN 55318-1172 Ph: (952) 448-8838 Fax: (952) 448-8805 BoLton-Menk.com As requested, we have prepared a scope of services and fee estimate for completing the 2017 Stormwater Pond Assessment for the City. Based on our understanding of the project, we propose the following scope of work: Stormwater Pond Assessment — French Lake (FR), Lake Classen (LC), Maxwell Bay (MB), and Stubbs Bay (SB) Subwatersheds 0 Coordinate and meet with City as necessary to review and discuss Pond Assessment procedures and results. • Establish location of all stormwater ponds within subwatersheds on City Parcel Maps through review of City Maps, Record Drawings, and visual inspection. • Establish pond ownership and maintenance responsibility for all stormwater ponds within the listed subwatersheds. e Establish location of City maintained stormwater ponds within subwatersheds with GIS coordinates. • Delineate watersheds for City maintained stormwater ponds. • Define watershed characteristics for City maintained stormwater ponds. Characteristics shall include impervious surface percentage, time of concentrations, areas, and soil types. • Define pond characteristics for City maintained stormwater ponds. Characteristics shall include design permanent volume, estimated existing permanent volume, outlet design, normal water level, and high water level and record to Cartegraph and/or GIS database. • Define drainage flow direction for all stormwater ponds within the listed subwatersheds. • Prepare initial rating of City maintained stormwater ponds within subwatersheds as defined in City's Pond Assessment Program. • Prepare recommendations for pond bathymetric surveys to establish accurate existing permanent volumes based on initial ratings and discussions with City. • Provide layer on City's GIS mapping for data generated from pond assessments. • Perform pond bathymetric surveys per previous recommendations, as allowed by available funding. Assumptions 0 French Lake (FR), Lake Classen (LC), Maxwell Bay (MB), and Stubbs Bay (SB) Subwatersheds are accurately delineated in the City's Surface Water Management Plan dated January 2011. H:\ORNO\2017 New Projects\Fee Estimate - 2017 Pond Assessments rev.docx Botton & Menk is an equal opportunity employer.