A. A geologic report shall include current up to date maps and a report containing not less than the following information:
1. The maps shall include: Sensitive land maps (high-water table, floodplain and wetland areas if applicable) including slopes & drainage for proposed sites):
a. The site location and regional setting of the subject property.
b. An overall site plan which illustrates exposure to geological and natural hazards identified in section 10-18-2 of this chapter and the geotechnical limitations identified in section 10-18-2 of this chapter. The map shall illustrate the proposed site modifications relative to geological and natural hazards and/or geotechnical limitations that may impact the site. Any corrective site modification actions necessary to mitigate or avoid hazards or limitations shall be clearly identified on the map.
c. Maps shall use a convenient scale of not more than one inch (1") equals one hundred feet (100') and a maximum contour interval of one foot (1'). Existing contours shall be shown by dashed lines and proposed contours shall be shown as solid lines. Boring logs, cross sections, test trench logs, soil sample descriptions, and test results shall be included.
d. The city engineer may require additional updated maps or additional detail on existing sensitive land use maps as reasonably necessary to evaluate actual or potential geologic hazards.
2. The report shall include:
a. A description of the proposed grading, filling, excavation, or structure;
b. An analysis of the effects of the proposed grading, filling, excavation, or erection of a structure in relation to the geologic conditions shown in the geologic maps;
c. With regard to a structure, an analysis of the manner in which the same, as constructed, will be made reasonably safe for human habitation;
d. Any corrective or remedial action necessary to avoid a violation of section 10-18-2 of this chapter, shall be described and analyzed in detail;
e. A list, including title, author and date, of all prior studies or reports which are relied upon to make this report; and
f. The city engineer may require additional information or analyses which are reasonably necessary to evaluate actual or potential geologic hazards. This includes submittal of reports to consultants or state agencies for review and comment. The cost of any additional reviews required by the city engineer shall be borne by the developer.
B. If the geologic report (maps and report) relates to land having a slope that exceeds ten percent (10%), the development proposal described in the geologic report shall conform to the provisions of section 10-18-17 of this chapter.
C. In the case of a proposal to grade, fill, or excavate, which is not directly or indirectly related to a proposal to erect a structure for human habitation, the city engineer may waive compliance with any requirement of this section not relevant to the proposed grading, filling, or excavating. (Ord. 2013-04, 4-18-2013, eff. 4-19-2013; amd. Ord. 2023-07, 6-1-2023)