Slope Stability and Landslide Risk – Examine
site vicinity and geologic literature for indications of past, present or potential slope failure.
Drainage and Flooding Risk – Determine where
storm run-off flows, evaluate flooding potential of streams, ponds, etc., determine
need for and feasibility of interceptor and/or drainage trenches.
Erosion and Bluff Recession – Advise on likely
erosion hazards and how to reduce erosion rates if possible, recommend
Foundation Settlement Assessment
Existing Structures – Examine existing structures
for indications of differential sub-grade settlement, adequacy of roof run-off and other
Planned Structures – Identify soil type,
slope and drainage characteristics that impact design of foundations,
likely need for retaining walls, foundation drains, etc.
Gary has inspected and drafted stamped reports for hundreds of sites
intended for owners of distressed properties, prospective home buyers,
developers, and land-use planners. Reports requiring an engineering
geologist stamp need documentation of findings and cost more than
Several government agencies in Oregon (including Lincoln County and
the Cities of Portland and Salem) require engineering geologists to
make recommendations (e.g., set-back distances or need for deep foundations)
when prospective building sites are mapped in areas of known geologic
hazards (such as bluff recession or steep, unstable slopes).
Reports to these agencies may require documentation stamped by an
engineering geologist alone, or by both an engineering geologist and
geotechnical engineer. Reports may be as simple as documenting the
project site does not meet the hazard criteria (such as building on
a relatively flat bench in an otherwise steeply-sloping vicinity)
or as complex as teaming with a geotechnical engineer to recommend
site modifications such as deep foundations (piles, walk-in basements),
retaining walls or drainage systems.
Foundation, gutter and drain inspections of existing buildings for
real estate clients may not require a certification stamp.