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XOMM: REOUUTIUNS I local foil and water conservation districti ond the United States Soil Conserv ’ation Service. (6) Fill or excavated material must not be placed in a manner that creates an unsta ble slope (7) Plans to place fill or excavated materi.il on steep slopes must be reviewed by the city enfincer for continued slope stability and must not create finished slopes of 30 percent or greater. (8t Kill or excavated material must not be placed in bluff impact zones. «9l Any alterations below the onlinary hij-li water level of public waters must first be authorized by the commissioner of the department of natural resources under Minn. Stat. i 103G.245. tlOi Alterations of topography must only be allowed if they are accessory to permitted or conditional uses and do not aiUerseU affi'cl adjacent or nearby property. Ml) I’bcement of natural rock riprap, includ ing associated grading of the shoreline and placement of a filter blanket, is per^ mitted if the finished slope does not ex* ceed three feet horizontal to one foot ver^ tical. the landward extent of the riprap is within ten feet of the ordinary high water level, and the height of the riprap alwve the ordinary high water level does not exceed three feet A riprap permit slnll be obtained per the requirements of section 78-969 ------------------ tf) Kxcavations where the intendcsl puriwse is connection to a public water, such as boat slips, canals, lagoons and harbors, are prohibited above the ordinary high water level. Such excavations Mow the elevation or the ordinary high watt-r k-vel are subject to approval of the departnu-nl of natural resources and other agencies with concur rent jurisdiction • Old No 101 2nd series. } H10.56(16xJu. 2-2-1- 1992. Ord ,\o. 127 2nd senes, f 8.7-11-1994. Onl No. 163 2nd series. S 3. 12-8-1997. Ord. No 171 2nd series. { 2.4-4*1998) Sec. 78*1287. Stormwater management. 1 The following general and specific standards Uball apply in addition to those sUndards found tin article Vlll of this chapter and section 82-222 tl) When possible, existing natural drninngcways. wetlands and vegetated soil surfaces must be used to convey, store, filler .md retain stormwater runoff before discharge to public waters (2) A development must be planned and con ducted in a manner that will minimize the extent of disturbed areas, runoff volocitio« and erosiun potential, and reduce and delay runoff volumes Disturbed nre.n* must be stabilized and protected as suun ns (Kissible and facilities or methods used to retain sediment on the site. (3) Wlicn development density, topographic features, and soil and vegetation condi tions are not sufTicient to adequately han dle stormwater runoff using natural fe.n- turrs and vegetation, vanous typos of constructed facilities, such as diversions s(>ttling basins, skimming devices, dikes, wnterways and ponds m.iy bo used Pn*f eci'nce must be given to designs using surface drainage, vegetation, and innilrn- tion rather than buried pipes and manmade ni.-iterials and f.icilitirs 141 Wlieo constructed facilities are used to perform water management, documentn- tion must be provided b> a reguien*d professional civil engineer that they are (Ji'signed and installed consistent with the field ofTice technical guide of the locnl 1 soil and water conservation district (5) New constructed stormwater outfalls to public waters must provide for filtenngor settling of suspended solids and ikitn ming of surface debris before duchargr. tOrd No 101 2nd series. I 1(10 aGtlfixKH. 2-24- 1992) Sec. 78*1288. Hard cover limitations. (a) No hard cover or irapervious surfi'^ shall be placed, located or constructed within T'l f»-ct of the ordinaiy high water level of any lake or tributary, except for stairways, lifts, landings and lockboxes as regulated elsewhere in this Code Supp .\o 1 CD76 193