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Zoning Application #2114 March 11, 1996 Page 2 J-1-2 Profiles of Soil Exploration and Correction K - Cross Section of Wall L - Resolution No. 3651 M - Photos of Bank 1987/1996 Brief Review of Application In the summer of 1987, many properties within the City sustained severe erosion resulting from back-to-back 100 Year Storms. The City adopted an emergency ordinance that would allow immediate repair of eroding banks. The City did not require conditional use permits but encouraged property owners to proceed with necessary repairs as long as the City staff was to issue land alteration permits covering improvement. The 24' of wall that exists within this property and the properties to the north were improvements conducted during the effective period of the emergency ordinance of 1987. Review the photos, Exhibit M, there is an existing timber retaining wall within a portion of the 90 lineal feet of the bank that is in a state of deterioration. There are visual signs of erosion of the bank. It is the applicant's plan to install the same treated timber walls constructed to the north. The Engineer strongly recommends installation of a modular wall as a permanent solution to the problem. For obvious aesthetic reasons, applicant wishes to proceed with the timber wall installation. Review Exhibit I, the applicant's consultant has submitted an engineering report for a two -tiered retaining wall ranging from 6-8' in total height. Gustafson asked for information on the structural capacity of the proposed helix earth anchors to be used in the installation. He also asked that the City be contacted at least 48 hours before the wall is installed. We recommend that applicant present plans to the County Highway Department for their review as certain activities adjacent to County right-of-way will be conducted within portions of the right-of-way. A permit will be required from the County for all work done within the right-of-way of the County road. The wall will be located within the lakeshore protected area approximately 69' from the 929.4. The improvement will result in a hardcover increase of 90 s.f. or 15.6% within the 0-75' area. Issues for Consideration 1. Since additional hardcover improvements are being proposed in the 0-75' setback area, should additional hardcover improvements be either removed or reduced in the 75-250' setback zone of the property (refer to Exhibit G)?