17.14.080 ENGINEERING GEOTECHNICAL REPORT

For those areas identified as an active or potential mapped earthquake fault and landslide area, or areas determined by review to contain geologically unstable conditions and for all areas which include class 2 slope areas through class 5 slope areas or Hazard Earthquake Primary Fault Area (HE), an engineering geotechnical report that complies with the provisions of this section is required. If a conditional use permit is required, the engineering geotechnical report shall be considered in the review of the conditional use permit application. A. The site-specific soil/geologic report by a qualified geotechnical engineer shall identify all geologic hazards, whether on or off-site, if such hazard or hazards affects the particular property including the following hazard(s), unless determined prior to the preparation of the report by the City Engineer that the specific potential hazard or hazard does not need to be considered in the report: 1. Flood history and potential; proximity to known canals, lakes, streams and alluvial fan flooding; 2. Definition of any areas of deformation with respect to active faults and recommended setbacks therefrom; 3. Evidence for other mass movement of soil and rock (landslides, debris flows, rock falls); 4. Identification of anomalies of the terrain or characteristics of the geological materials which would have any potential impact upon the use of site; 5. Determination of groundwater characteristics, including, but not limited to the location and yield of springs; and 6. Uncontrolled fill material within the building envelope of a lot or other uncompacted soils. B. The report shall contain written recommendations for construction of structures and avoidance or mitigation of the hazards. Land drains alone through private property are not allowed and are discouraged through public property because long-term maintenance of drains cannot be guaranteed; C. The report shall consider and contain data regarding the nature, distribution, and strength of soils within the project area. The soil report shall include a unified classification of all soils with an estimate of susceptibility to erosion, plasticity index, liquid limit, shrink-swell potential, general suitability for development, shear strength, bearing capacity and estimates of infiltration rates. D. The report shall contain an estimate of the likely highest level of the water table considering the long-term effects of development and irrigation. E. The report shall include a statement by the qualified geotechnical engineer preparing the report that the safety and integrity of the proposed building or structure is not compromised by potential geologic hazards and that the proposed building or structure, as designed and proposed, can be built in a manner that complies with the soils, footings and foundation requirements of the applicable building code. F. After the application is received by the City, the geologic and soil report will be reviewed by the City Engineer and, if the report finds that geologic hazards exist, the report will be reviewed by other geotechnical advisors which may include the Utah Geologic Survey (UGS). If after review, the geotechnical advisors concur with the geologic and soil report and the proposed remedial measures submitted by the applicant, the item will be forwarded to the land use authority designated to review the application for a conditional use permit. G. The required reports and the plans to address the concerns set forth in those reports shall be stamped and approved by a licensed professional engineer and must be approved by the City Engineer. H. A conditional use permit may be denied and use of the property therefore prohibited, if geologic hazards associated with the property cannot be substantially mitigated by the imposition of reasonable conditions and/or the requirements of the geologic and soil report and the provisions of the applicable building code related to soils, footings, and foundations are not met. (Ord. 2022-5, 2022)