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{i} - ■■I <br />L <br />the shore impact zone or over public waters if it is used <br />primarily to illuminate potential safety hazards and is shielded <br />or otherwise directed to prevent direct illumination out across <br />public waters. This does not preclude use of navigational <br />lights. <br />Subp. 11. Stormwater management. Local governments must <br />consider proper stormwater management in all reviews« approvals, <br />and permit issuances under shoreland management controls adopted <br />under parts 6120.2S00 to 6120.3900. The following general and <br />specific standards must be incorporated into local government <br />shoreland management controls and their administration. <br />A. The following are general standards: <br />(1) When possible, existing natural drainageways, <br />wetlands, and vegetated soil surfaces must be used to convey, <br />store, filter, and retain stormwater runoff before discharge to <br />public waters. <br />(2) Development must be planned and conducted in <br />a manner that will minimize the extent of disturbed areas, <br />runoff velocities, erosion potential, and reduce and delay <br />runoff volumes. Disturbed areas must be stabilized and <br />protected as soon as possible and facilities or methods used to <br />retain sediment on the site. <br />(3) When development density, topographic <br />features, and soil and vegetation conditions are not sufficient <br />to adequately handle stormwater runoff using natural features <br />and vegetation, various types of constructed facilities such as <br />diversions, settling basins, skimming devices, dikes, waterways, <br />and ponds may be used. Preference must be given to designs <br />using surface drainage, vegetation, and infiltration rather than <br />buried pipes and man-made materials and facilities. <br />B. The following are specific standards: <br />(1) Impervious surface coverage of lots must not <br />exceed 25 percent of the lot area. <br />(2) When constructed facilities are used for <br />stormwater management, they must be designed and installed <br />consistent with the field office technical guide of the local <br />soil and water conservation districts. <br />(3) New constructed stormwater outfalls to public <br />waters must provide for filtering or settling of suspended <br />solids and skimming of surface debris before discharge. <br />Subp. 12. Mining of metallic minerals and peat, as defined <br />by Minnesota Statutes, sections 93.44 to 93.51. Mining of <br />metallic minerals and peat shall be.a permitted use provided the <br />provisions of Minnesota Statutes, sections 93.44 to 93.51, are <br />A-1.33 <br />fc. <br />L. . . ■