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A. Modular block walls over four feet in height as measured from the bottom of the base block must be designed by a professional civil or geotechnical engineer.

B. A wall drain must be provided for all modular block walls greater than four feet in height as measured from the bottom of the base block. The drains must be installed per the clearing and grading development standards.

C. The procedures and requirements in the clearing and grading development standards and guidelines related to the wall design and construction must be followed. If the wall is within a structure setback, see also the height in LUC 20.20.025, now or as hereafter amended.

D. The geotechnical engineer must provide construction monitoring and/or testing as required by the permit conditions, and submit construction inspection reports to the department for all modular block walls that require design by a geotechnical engineer. For each project, or phase of a project, the geotechnical engineer must provide a final letter or report summarizing the results of the construction monitoring for each modular block wall, verifying that the wall construction meets the geotechnical recommendations and design guidelines. The final letter or report must be submitted to the department prior to the final clearing and grading inspection. (Ord. 6318 § 24, 2016; Ord. 5452 § 11, 2003.)