Possible Costs Associated with Investigating and Mitigating Some Geologic Hazards in Rural Parts of San Mateo County, CaliforniaEntry ID: USGS_OFR_00127
Abstract: These susceptibility maps and the cost assessment data allow landowners in
rural western San Mateo County to determine if their property is impacted by
deep-seated landslide and debris flow hazards and, if so, how much money might
be required to investigate them. The information is also useful for land use
planners, local officials and public interest groups. For example, the maps
will be useful ... for purposes such as determining where sediment from landslides
might adversely affect fish in the various creeks, or where roads might be
closed after heavy rainfall.
This publication addresses deep-seated landslide susceptibility, debris flow
susceptibility, and other geologic hazards in rural parts of western San Mateo
County. The report also estimates possible costs of investigating and
mitigating the landslide hazards. The study area includes the Half Moon Bay
7.5' quadrangle, the Montara Mountain 7.5' quadrangle, and the Pescadero/Butano
Creeks watershed. Hazard maps were derived by integrating slope data and
previous geologic, landslide and debris flow mapping. The digital database,
which is found at &http://geopubs.wr.usgs.gov/open-file/of00-127& includes 43
plotfiles for slope maps, Digital Orthophoto Quadrangle maps, Digital Raster
Graphic topographic base maps, geologic maps, deep-seated landslide inventory
maps, deep-seated landslide susceptibility maps, and debris flow inventory and
susceptibility maps. Twelve ARC export files of supporting digital data are
included in the database, and other data have been published previously and are
available at other USGS websites named in an accompanying pamphlet (of00-127_2.
ps, of00-127_2.pdf, of00-127_2.txt).
As explained in the pamphlet, a geohazard website included in the publication
facilitates interactive use of the hazard information in this database. All
data layers are in Universal Transverse Mercator (UTM) projection, zone 10.
The scale of the source maps limits the spatial resolution (scale) of the
database to 1:24,000.
An explanatory pamphlet (of00-127_2.ps, of00-127_2.pdf, of00-127_2.txt)
accompanies the digital database. An interactive website for landslide hazards
http://landslides.usgs.gov/ is provided for the study area. People
can use the website to locate their property, overlay deep-seated landslide
hazard maps and determine the possible costs associated with investigating
them. Information is provided for investigating and mitigating several other
kinds of geologic hazards, but the data are not interactive.
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: Brabb, E. E.; Roberts, S.; Cotton, W. R.; Kropp, A. L.; Wright, R. H.; Zinn, E. N.; Mills, S. K.; Barnes, J. B.; Marsolek, J. E.
Dataset Title: Possible Costs Associated with Investigating and Mitigating Some Geologic Hazards in Rural Parts of San Mateo County, California
Dataset Series Name: U.S. Geological Survey Open-File Report
Dataset Release Date: 2000
Dataset Release Place: Menlo Park, CA
Dataset Publisher: U.S. Geological Survey
Data Presentation Form: geologic mapOnline Resource: http://geopubs.wr.usgs.gov/open-file/of00-127
Start Date: 2000-01-01Stop Date: 2000-12-31
Latitude Resolution: 1.0 m
Longitude Resolution: 1.0 m
HUMAN DIMENSIONS > NATURAL HAZARDS > EARTHQUAKES
LAND SURFACE > EROSION/SEDIMENTATION > EROSION
LAND SURFACE > EROSION/SEDIMENTATION > LANDSLIDES
LAND SURFACE > TOPOGRAPHY > LANDFORMS
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHICAL RELIEF
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
OCEANS > COASTAL PROCESSES > EROSION
SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE MAGNITUDE/INTENSITY
SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE OCCURRENCES
SOLID EARTH > TECTONICS > PLATE TECTONICS > FAULT MOVEMENT
Access Constraints None
Use Constraints Uses of this digital geologic map should not violate the spatial
resolution of the data. Although the digital form of the data removes
the constraint imposed by the scale of a paper map, the detail and
accuracy inherent in map scale are also present in the digital data.
The fact that this database was edited for a scale of 1:24,000 means
... that higher resolution information is not present in the dataset.
Plotting at scales larger than 1:24,000 will not yield greater real
detail, although it may reveal fine-scale irregularities below the
intended resolution of the database. Similarly, where this database
is used in combination with other data of higher resolution, the
resolution of the combined output will be limited by the lower
resolution of these data.
Data Set Progress
Distribution Media: online
Distribution Format: ARC/INFO
Fees: No fees for digital forms of the report.
Distribution Media: 8 mm Exabyte tape
Distribution Format: AR/INFO
Fees: No fees for digital forms of the report.
Role: DIF AUTHOR
Email: skmills at usgs.gov
U.S. Geological Survey 345 Middlefield Rd., M/S 975
City: Menlo Park
Province or State: CA
Postal Code: 94025
U.S. Geological Survey, 1991, Digital Raster Graphic Topographic Base Map:
U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, 1998, 10 meter Digital Elevation Model: U.S. Geological Survey, Reston, Virginia.
U.S. Geological Survey, October 30, 1991, Digital Orthophoto Quadrangle: U.S. Geological Survey, Reston, Virginia.
Brabb, E.E., Graymer, R.W., and Jones, D.L., 1998, Palo Alto 30' x 60' Quadrangle, California: a digital database: U.S. Geological Survey, Menlo Park, California. http://geopubs.wr.usgs.gov/
Ellen, S.D., Mark, R.K., Wieczorek, G.F., Wentworth, C.M., Ramsey, D.W., and May, T.E., 1997, Map showing principal debris-flow source areas in the San Francisco Bay region, California: San Francisco Bay Region Landslide Folio, U.S. Geological Survey, Menlo Park, California.
Brabb, E. E., and Pampeyan, E.H., 1972, Preliminary Map of Landslides in San Mateo County, California: U.S. Geological Survey, Menlo Park, California.
Pampeyan, E. H., 1994, Geologic map of the Montara Mountain and San Mateo 7.5' quadrangles, San Mateo County, California: U.S. Geological Survey, Menlo Park,
Brabb, E. E., Pampeyan, E.H., and Bonilla, M.G., 1972, Landslide Susceptibility in San Mateo County, California: U.S. Geological Survey, Menlo Park,
Creation and Review Dates
DIF Creation Date: 2000-08-04
Last DIF Revision Date: 2008-05-27