7A Motion to Authorize Staff to Contract with WSB & Associates, Inc. to Complete the Valentine Lake Subwatershed Drainage Study in an Amount Not to Exceed $14,660

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��+ Ws7� � � h.ra,�«,. , �. I)rnirtage Anal��sis' cPc Flnad Reductian Plaiz — Valerxtine Park Aa�gusr ,21, 20d8 Page I of 3 Pzoposa� to Provide a Drainage Analysis and Flood Reduction Plan %r Valen#ine Park �o��c� i�'nd��°s�r��tding Vaientine Park, iacated at the intersection of Lake Valentine Road and �id Highway 10 (see attached �gure}, is a small park cansisting of a parking area a�d a baseball Fie�d and is currentiy prone to floading. Runoff from the adjacent neighborhoods discharges from rhe storm sewer on the west side of the park and is directed to a culvert at the northeast corner which carries it under Old Highway i0 to Laice Valer�tine. It is our undersranding that the City intends to rrtake improvements to Valen�ine Park and t�e adjacent neighborhoo�s in rhe near Future, includir�g potenria� trail improvernents along Snelling Avenue, which are outlined in a separate RFP. For this reason, an analysis of the drafnage system and hydrology in the area is needed to identify potential solutions to t�e fiooding problem. This analysis wi11 be performed using XP- SWMM safeware, data provid�d by the City, and Feld survey data. _ ___ .�"c�,j�� .�l�p��c�ach��cQ�e af �ervi��s Our proposed scope of services is based on our understanding ot the project, Iimited in house da�a, and experience with similar projects. The Eollowing are the primary components of the wor�C plan: Praject Managemenr,/Meetings Project management is an important task to each phase �f the project. This task consists of management and adrrfinistration, praject coordination, and co�nmunication with the City of Arden Hills. This task aIso includes atr�ndance at three �nee�ings with City sraff throughout the proj�ct. Proper co�npletion of rhis task will allow for open lines of eommunication and rourine updates on project issues, as weli as iceeping the project on schedule and within b�dget. Optionul Meetir�gs — As needed, three supplementai meetings wiIl be attended to present rl�e �ir�dings of rhe drainage analysis ta the City Co�ncil, the Parks, Trail and Recrea�on Committee, and the public. This wiii involve presenting the analysis r�sults and the recorn�nended solutions �o the probiems. 2. Data CaIlection/Model Develo�znent This involves the gathering af information necessary to cornplete a successful analysis. This informarion will include the fo�lowing ite�ns, as well as any additianal informat�on that will be needed �or the eornpletion af the project: • Record drawings and/or fieid surveys provided by the Ciry. • Topographic and storzn sewer invert data obtained frarr� field surveys. This task is anticipated to require a twa-persan survey crew and take approxirnately two days. • Canc�ptual informarion of anticipated park, neighborhood, and trail improvement plans. This witl aid in providing the City with design alternatives that wilt coincide with future plans. An XP-SWMM model will be used extEnsively to analyze the existing storm sewer sqstem and surrounding hydrology. The XP-SWMM mode� develaped as part of this task will include the areas draining directly and indirectly to Valentine Park. This modet will be used Co identify prablem areas, determine th� arnount of runoff that needs to be stored or infil�-a�ed, and evaluate t�e effectiveness af variaus alternatives to solve the flooding problems.