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The sections be�ow provide a summary af the options along with rough cost estimates and <br />descriptions of what they involve. <br />MANAGEMENT OPTIONS FOR LANGTON LAKE <br />Managerr►ent options for Langton Lake focus lar�ely on achievinj a small reduction in watershed <br />loadings to the lake, since this lake is in relatively good shape for its size and depth. These are <br />shown on the following page, in Tab1e 5.4. <br />Table 5.4 — Management aptions matrix for Langton Lake <br />Activity Phase Estimated Cost Comments <br />Targeted strcet-sweeping 1 $150/street mile Sweep direct drainage In March/early April, <br />June, Octot�er/November, remainder of <br />drainage as bud�et ailows <br />Soil phosphorus testing 1 $40Q-600 in Top priority are residentiai areas that drain <br />analytical costs for directly to lake. Extend focus to other areas <br />50-SO sann les as funds anc� time allow. <br />Promotion of no- I $500 Taraet areas where soil tests show no P <br />phosphorus fertilizer use necessary. Can work through vendors <br />and/or volunteer groups (including <br />nei ahborhood). <br />In-lake monitoring 1 $15 Monitoring shoulcf be conducted bi-weekly <br />throughout May-September period. Low <br />cost option is participation in MPCA's <br />Clean Lake Monitorin� Program (CLMP) <br />(water clai-ity only). <br />Conduct periodic sediment 2 $3,0�0 —$6,000 This is an important water quality protec�ion <br />removal in upper celi of feature serving the industrial portion of the <br />industrial treatment pond watErshcd. Periodic reznoval of sedirnents <br />(every 5-10 years)- especially in the upper <br />ceIl- will preserve the treatment capability <br />of this ond. <br />Treat runoff from hi�h 3 $12,000 - Possibilities may be Park parkin� lot west <br />priarity impervious areas $30,000/site plus of lake and residential streets east of lake. <br />in direct draina�e. maintenance Treatment would utilize sub-grade swirl <br />concentrators or ec��zivalent, possibly <br />dischargina to filtration/iniiltration feature. <br />Conduct feasibility study to evaluate <br />hysical feasibility, estimate s ecific costs. <br />Maintain more open water 3 $500-$35,Q00 Options for mana�ement of this cell to <br />in north cell. dependin� on maintain more open �vater include: <br />option purs�ed Chemical treatment <br />Crty of KosevilLe 54 <br />Parks 1Vat�u•al Resnr�rce rYlmiageuce�at <br />