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PLANNING COMMISSION - JUNE 18, 1991 Page 7 • 1 Natural Resources encourages that structures be built no less than 75 feet from 2 the lake in order to preserve sight lines and in order to prevent the building of 3 structures which might cause runoff into the lake. These conditions have 4 created an excessive number of variance requests. 5 6 The objectives of creating the new zoning district are to eliminate the excessive 7 number of variance requests while continuing to protect the water quality of 8 Silver Lake, which can be harmed by numerous impervious structures built too 9 close to the lake. 10 11 City Manager Burt participated in discussions with both the City Attorney and 12 the lake residents' ad hoc committee. The alternative of changing the 30-foot 13 street setback requirement was considered. City Manager Burt stated that 14 decreasing the 30-foot setback requirement would limit the space necessary for 15 wintertime snow storage. Increasing the 30-foot setback requirement would 16 cause even more difficulties for those building on smaller lots. 17 18 City Manager Burt informed the Planning Commission that the City Council has. 19 already had two readings of the proposed ordinance and that the third reading 20 is required in order to pass the ordinance. Existing structures are, of course, 21 grandfathered in, but any structure beyond repair which needs to be rebuilt • 22 would require a building permit. 23 24 In response to the question by Commissioner Faust, City Manager Burt 25 responded that any new construction must be reviewed. by the Watershed 26 District, and that the DNB's 75-foot setback is a recommendation and not a law, 27 although it has been respected to date. He stated that the passing of the new 28 ordinance will compensate for the lack of a St. Anthony shoreline preservation 29 act. 30 31 City Manager Burt continued that the City is attempting to determine which 32 kinds of structures will not cause runoff into the lake and might, therefore, be 33 built closer than 75 feet from the shoreline. It has so far been suggested that 34 structures with pervious surfaces such as decks can be built to within fifty feet 35 of the lakeshore, but that structures with impervious surfaces such as cement 36 patios should be built no closer than 75 feet from the lakeshore. Swimming 37 pools have never been considered structures and could, therefore, be built 38 within the fifty-foot limit. Preservation of a fifty-foot sight line around the lake 39 was determined to be adequate. 40 41 Commissioner Murphy suggested that the ordinance should address the ratio 42 of impervious surface to lot size. City Manager Burt replied that the City is in •