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/ G_ <br />$1NGi <br />JUL 8 1995 <br />TO: Mayor and City Council , /CI Y OF MONO <br />FROM: Mark Bernhardson, City Administrato��`�t� <br />DATE: July 3, 1985 <br />SUBJECT: Hardcover Discussions <br />As presented to the Council at the last meeting there was <br />discussion on hardcover that focused on two primary points, the <br />first point: <br />- A. Review of existing hardcover standards in an <br />effort to determine for both staff, Council and <br />residents, guidance as to what is or is not hardcover. <br />- B. The second issue was how to handle trade-offs for <br />any hardcover in any of the three zones which were above <br />the permitted percentages. <br />In relationship to the first issue the City has contaced Dr. <br />Hansen of the Freshwater Biological Institute. Dr. Hansen has <br />indicated he does not feel his area of expertise lies in the area <br />specifically of hardcover but rather in the area of how any run- <br />off impacts the ecological balance in the lake. Jeanne Mabusth, <br />Glenn Cook and myself have discussed items which are considered <br />hardcover together with items that based on that have been <br />determined to be non -hardcover in the past together with certain <br />items that may or may not be considered hardcover based on their <br />performance. In this discussion it was felt we should look at <br />the basics regarding hardcover and run-off and develop a "model" <br />and base line information from which to work. The elements for <br />such a model would be as follows: <br />a.) Topography <br />- Slope <br />- Contours and Drainage <br />b.) Surface Permeability <br />- Ground Cover <br />- Material (Soil) Type <br />- Level of Saturation <br />- Interaction with Surrounding Surfaces <br />c.) Precipitation <br />- Quantity <br />- Intensity <br />Any run-off from such lands have three principal effects: <br />- Carrying sediment and nutrients (principal ly <br />phosphorus) in the lake <br />