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wsb <br />April 29, 2022 <br />City of Lino Lakes <br />Mr. Michael Grochala <br />600 Town Center Parkway <br />Lino Lakes, MN 55014 <br />Re: Proposal to Complete a Drainage Plan for the Lakeview Area <br />Dear Mr. Grochala: <br />Enclosed for your review and approval is our proposed scope of services, fee, and <br />2 schedule for providing professional engineering services to complete a drainage study to <br />° investigate and review stormwater BMP options and trunk conveyance needs for the <br />Lakeview Area. <br />Z <br />w <br />co <br />U) SCOPE OF ENGINEERING SERVICES <br />i nls worK plan consists of a tlela visit, nyaroiogicinyaraulic analysis, evaluation of <br />00 <br />stormwater management BMPs for compliance with RCWD requirements, preparation of <br />drainage study, and coordination with the City. The following are the tasks that will be <br />co included as part of this evaluation: <br />ID <br />Task 1 — Field Walk <br />We will complete a field walk to gather information regarding existing drainage patterns <br />and potential BMP locations. <br />Z <br />Task 2 — Review of Previous Study <br />We will review the study completed in 1987 for this drainage area and collect information <br />from the City on the several stubs that have been provided to collect drainage from the <br />w Lakeview Area. <br />Z <br />Z <br />Task 3 — Existing Conditions Hydrologic & Hydraulic Model <br />This task consists of delineating existing conditions drainage patterns, defining the <br />o primary outlet points and connections to the existing system, and developing an existing <br />Ui <br />conditions H/H model. We will determine the capacity of the existing storm sewer stubs <br />U) and estimate the existing road width based on aerial image review. <br />We will evaluate the capacity of the existing storm sewer stubs assuming that there are <br />Ui <br />no tailwater conditions or downstream constraints that would reduce the pipe capacity. <br />Z <br />w <br />a Deliverables: existing drainage area map, existing conditions Hydrocad H/H model, <br />Z capacity of existing stubs <br />w <br />X <br />Task 4 — Proposed Conditions Hydrologic and Hydraulic Model <br />This task consists of creating a proposed hydrologic/hydraulic model that incorporates <br />the new impervious from the Road reconstruction project (scheduled for 2027). We will <br />\\metro-inet\linolakes\Shared\Community Development\Projects\Planning Studies\2022 Lakeview Area Drainage\Staff <br />Reports\20220509 CC SR Lakeview Drainage Proposal\4. 20220429 Lakeview Drainage Proposal.docx <br />