1977-01-25 - Laserfiche WebLink

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a SUGGESTED SOLUTION . A. Control of Lake Level Fluctuations Thiscanbe accomplished by one of two methods: by estab- lishing a man-made outlet at an elevation below the natural ou_t- et or by reducing the volume df runoff entering the lake. Of these alternatives, reducing the volume of runoff entering the lake is the preferred method. At the present time this lake is functioning as a stormwater ponding site. Most of the run- off from the 110 acre watershed is ponded in this lake where it evaporates into the air or seeps through the soil into the water table. To provide an outlet at a lower elevation would allow more water from this lake to flow downstream into Pike Lake where it would accentuate high water level problems there. To provide the maximum amount of stormwater storage the natural y outlet should be maintained. This is especially important since additional land will be added to the drainage area. The additional stormwater runoff will most likely raise the -normal water level of the lake. Some trees have already been lost (apparently from high water levels) and more can be expected to be lost if the normal water level raises (exactly how many --has not been determined. The benefits derived by retaining as much stormwater storage as possible are greater than the loss - of a few trees, the trees being a renewable resource. A pro- gram should be initiated to replace the trees lost and those that can be expected to be lost. Care should be taken to plant the trees above the elevation of the natural outlet. The second alternative, reducing the volume of runoff entering 7 -the pond, will not only ease the lake level problems but will help to reduce the amount of pollutants entering the lake. There are two aspects involved in reducing the volume of runoff: increasing the infiltration of stormwater into the ..soil, and retention of the runoff to prevent it from entering storm sewers. . v To accomplish this will require the installation of cer- tain practices and the carrying out of various management pro- cedures. These are outlined below. The effects of a single practice or management procedure will seem insignificant, how- ever, the cumulative effects will be effective in reducing the amount of runoff. f u :..: ,-.77 ... w_$,.. TM'."`", •-.. _�..�?`.,+..x +,<�.:r:- .. ._. _ __.. r.:rsa+,bY�s: - ._ - ... '�.es+-^. .-...._. ,R-^,.