New Search
theses and dissertations prepazed by students at University of Oregon or Oregon State <br />University, studies made by local and regional planning boazds, and knowledgeable <br />~' ~'~ individuals such as university professors, reference librarians, geotechnical <br />engineering firms, engineering geology firms, site exploration firms, local quarry <br />. operators, construction aggregate suppliers, and appropriate persons from agencies <br />such as State geological surveys, the US Geological Survey (ITSGS), and the US <br />Army Corps of Engineers (ACOE). <br />2.2 Site Investi ag tion. The site visit shall focus on conditions, such as, but not <br />limited to, the presence of expansive clay, slope movement, shallow groundwater or surface <br />water, presence of fill, hazardous materials, or subsurface obstructions that require special <br />design considerations. The site reconnaissance shall be performed by a Qualified Registered <br />Professional and include the following items (as applicable): <br />2.2.1 Verify topography as indicated on contour map. Measure maximum <br />. slopes using clinometer or equivalent. . <br />2:2.2 Check existing cuts/exposures to determine soil depth, characteristics, <br />classification and/or rock type/weathering state/depth. <br />2.2.3 ~ Check. for evidence of seeps/springs and vegetation characteristics <br />2.2.4 Check for evidence of slope movement/creep, including .leaning <br />conifers, pistol-butts on trees, sweeps (long curved sections)on conifers, and <br />topographic features. <br />2.2.5 Check performance of adjacent structures by noting any <br />cracking/unevenpavement, cracked/separatedsidewalks and driveways, uneven roof- <br />lines and/or cracked/separated foundations. <br />' 2.2.6 If possible, contact owners/contractors of adjacent lots to evaluate <br />anecdotal observations of the site and surrounding azea in regard to soils, hydrology, <br />'" and construction conflicts. <br />3. Report Content. <br />3.1 Introduction: <br />3.1.1 Purpose and scope of investigation. <br />3.1.2 Client or party that. commissioned the report. <br />3.1.3 Authorization for study. <br />3.2 Project Location and Description: <br />3.2.1 Site location and description, including topography, slopes within and <br />adjacent to the project. . <br />3.2.2 Description of proposed development, structures, and/or facilities. <br />3.2.3 Description ofprevious investigations, previous structures on the site, <br />project file data, and anecdotal information from residents, as applicable. <br />3.2.4 Geologic setting --discussion, based on literature survey, of the local <br />surf~cial geology that may affect the project and potential geologic-natural hazards, <br />°- including potential seismic events. _ <br />'3.2.5 ~ Site reconnaissance observations -- topography; slopes; exposures; <br />condition of adjacent structures; drainage features, vegetation. <br />3.3 Conclusions. <br />3.3.1 Summary of site subsurface soiUrock conditions, based on literature <br />survey and site reconnaissance. <br />- 3.3.2 Indications of the absence or presence of potentially expansive clays, <br />`, Administrative Order - 7 <br />rladminord~rules\02geotechlao.wpd(09/05/02) <br />,_ __ <br />