PL PACKET 09191995 - Laserfiche WebLink

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CHAPTER 3 PROTECTION OPEN SPACE 51 • could dry up. Urban development—paving, building, and the like—hastens and channels the runoff of water into storm sewers and prevents percolation. Therefore, all communities overlying the recharge area have a responsibility to assure a continuing source of water and to minimize any toxic substances which could enter the aquifers and contaminate the water. Little detailed information is known about the location of groundwater recharge areas. The Metropolitan Council's Protection Open Space Chapter shows New Brighton in the recharge zone. New Brighton needs to be particularly concerned about the construction of local sources of potential groundwater pollution. GOAL: GROUNDWATER RECHARGE AREAS To identify all groundwater recharge area in New Brighton and protect them from - physical development and/or contaminating sources. OBJECTIVE: GROUNDWATER RECHARGE AREAS No alterations of recharge areas shall be allowed which would negatively affect infiltration of water into or divert the flow of surface water from recharge areas. POLICY: GROUNDWATER RECHARGE AREAS Development proposals within designated recharge areas will be required to provide proof there will not be a detrimental effect on the quality or quantity. FLOODPLAINS The Minnesota Department of Natural Resources defines a floodplain as the area adjacent to a watercourse which may be covered by the regional or 100 year flood ( a flood which has a one percent chance of occurring each year). A floodway refers to the river channel and the portions of the adjoining floodplain which are required to carry and discharge the regional flood. A floodfringe refers to areas outside the floodway which may be subject to inundation. The capacity of a floodplain to carry stormwater is reduced by development restricting the natural stream flow, such as bridges, or ice debris jams that may cause water to backup and inundate adjacent areas. In urban areas, large areas of impervious surfaces tend to accelerate runoff. In New Brighton, where watercourses play an important role in the storm