MLML-Benthic Lab-Highway One
Highway One, Lone
Tree Slide Monitoring
Marin County, California
The Lone Tree Slide baseline and monitoring projects commenced
in 1990 and ended in 1996. The long term ecological study included one year
of baseline characterization of the slide area's physical and biological environments.
The slide was then manipulated by CalTrans to remove sediments closing Highway
One. Five years of post-manipulation monitoring followed. The Benthic Lab group's
objectives were to document the physical attributes and ecological affects of
the slide and to provide information useful towards the management of slide
prone regions of California.
Physical information collected included: measurements of the
limits, velocity and hydrologic conditions of the fill, beach sediment and rock
movement, nearshore plume movement, suspended stream sediment, meteorological
conditions, and seafloor mapping, morphology and bathymetry. Biological information
included surveys conducted to characterize and monitor rocky intertidal and
subtidal communities, intertidal sand beach communities, subtidal sand communities,
and slide area vegetation.
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