Consideration
of Geologic Conditions in Optimizing a Tunnel and Ocean Outfall Alignment
within the
Sackett, David M.1,
Thomas W. McNeilan1, Calvin G. Jin2 (1) Fugro West, Inc, Ventura, CA (2) County Sanitation
Districts of Los Angeles County, Whittier, CA
The Sanitation Districts of
This paper discusses feasibility phase
studies designed to evaluate how geologic conditions will affect the selection
and comparison of several tunnel/outfall corridors. Both urban development and
geologic conditions will impact final design and construction of the outfall.
Other factors include access shaft locations and optimal diffuser effluent
dilution and dispersion. Modeling will be based upon available satellite and
aerial imagery, water well logs, and geologic data from the USGS, CGS,
scientific institutes, and proprietary oil & gas studies.
The final choice of a preferred alignment
will result from a careful balance between the most favorable geologic
conditions for tunneling, locating shafts in areas that minimize disruption to
urban activities, and avoidance of environmental impact in areas of high
sensitivity.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California