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2017-05-10 CC Packet
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2017-05-10 CC Packet
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April 26, 2017 <br />Mike Ericson <br />Page 3 of 7 <br />Reference: City of Centerville Local Water Plan <br />iii. Physical Environment: The current plan covers general information <br />regarding the general location, geology and topography, soils, climate, lakes <br />and other significant waterbodies, wetlands, land use, utility systems, unique <br />areas, zoning and floodplain management, and groundwater characteristics of <br />the City. The LWP will detail drinking water supply management areas <br />(DWSMA) and the city's plan for addressing/protecting groundwater. The Plan <br />will discuss groundwater discharge and recharge areas including the <br />identification of potential land uses affecting groundwater. The City will update <br />land use and zoning maps for present and future conditions, as well as a land <br />cover classification map, such as Minnesota Land Cover Classification System <br />(MLCCS) maps. Key Conservation Areas will be identified. We will specifically <br />review the impaired waters list under the water resources section and compare <br />it to the most recent 303d impaired waters list from the Minnesota Pollution <br />Control Agency. A map of these waters will be provided. Water bodies with <br />TMDLs will be listed in this section. For Centerville, these include Peltier Lake <br />& Centerville Lake TMDL, Lino Lakes Chain of Lakes TMDL, Upper Mississippi <br />River TMDL. The Upper Mississippi River TMDL for bacteria has been set <br />recently, so we will discuss actions for addressing the TMDL in this section. We <br />will perform a review to this information and work with the City to verify any <br />changes or additions that are needed to remain in compliance with the section. <br />iv. Hydrologic Calculations/Modeling Parameters: This section covers the <br />water quantity and NURP standards when designing storm water ponds and <br />other stormwater features. We will update the design storm parameters to <br />reflect the new NOAA Atlas 14 Rainfall data that has become the new industry <br />standard. The LWP will address physical changes to the stormwater system, <br />and if there are changes, these will be reflected in an updated map of the <br />system. It is our understanding there is not a City-wide stormwater model for <br />the City of Centerville and this proposal does not include time for the <br />development of any hydrologic or hydraulic modeling. Stantec is aware the Rice <br />Creek Watershed District has created a district -wide hydrologic and hydraulic <br />model. Stantec well request to obtain a portion of the model that includes the <br />City of Centerville to try to gather information on drainage areas and paths of <br />stormwater runoff, as well as to provide information about future conditions <br />and intercommunity flows. The model outputs might also help identify and <br />acknowledge future changes to structures that have potential for overtopping, <br />as well as impacts of future land use changes on peak water elevations at <br />storage areas that are currently at risk to flooding due to the more intense <br />storms that are occuring. Additionally, RCWD requires an updated floodplain <br />map, which will also be acquired by the RCWD and based on their District - <br />Wide Model. <br />v. Water Resources Management Objectives and Policies: The current <br />water resources management objectives and policies cover items related to: <br />water quantity; water quality; recreation; fish and wildlife; enhancements of <br />public participation through information and education; public ditch systems; <br />Dr.sigrt with community in mind <br />89 <br />
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