CCP 08-20-2001 - Laserfiche WebLink

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I ~ There are two policies which relate to storage of runoff either on-site or off.site within the RCWD. One states that generally, there is no need for runoff control through the planning period. Another policy indicates that additional storage is needed presently or additional storage will be required through the planning period. Each of the 84 subwatersheds modeled in the RCWD's stormwater runoff study will be subject to one or the other of these two policies. (The runoff policies are the only ones which are not tied into the 24 subwatersheds used for the primary planning efforts of this plan.) The model was used to determine where significant increases in runoff were expected due to development and also where additional ponding would possibly have an adverse effect on the composite flood hydrograph. I I I I I I The policy of the RCWD is to retain the present capacities of the existing drainage system. This is done to reduce costs necessary for possible remedial measures dictated by improper development. The RCWD has also identified a trunk drainage system as described in Subsection 15 of Section 5. Objective B: Improve Water Quality II I The second major objective in the water management plan is to address water quality problems. The purpose oithis objective is to improve the water quality oflakes, streams, and wetlands thereby improving habitat for fish and animals and protect water quality for drinking water purposes. In order to more fully describe this objective, five policies were developed. I A policy of the RCWD is to reverse the upward trends observed in pollutants, especially nutrients and sediment loadings, into most of the lakes within the RCWD. This can be done through treatment or control of runoff quality. Minimum requirements have been set which closely follow Metropolitan Council standards. I I I I The RCWD has considerable experience and success with the use of natural wetlands to treat runoff, particularly in the southwestern portion of the watershed. Therefore, a policy to protect wetlands is viewed as an effective way to enhance water quality. The northern portion of the watershed lies outside of the Metropolitan Urban Service Area (MUSA) line, as delineated by the Metropolitan Council. Outside this line, wastewater treatment is accomplished through individual wastewater treatment systems, primarily septic tanks. The RCWD does not desire to directly regulate individual wastewater I 4-3 10/97