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 TABLE 4-2-6B
Sources of Existing Information
General Information
Specific Information
Source
Base Map
General
County road department
City, county, or regional
U.S. Geological Survey (USGS)
office or outlets for USGS map
sales (such as engineering supply
stores and sporting goods stores)
U.S. Department of Agriculture
(USDA), Soil Conservation Service
(SCS), surveyors and aerial
photographers in the area
Topography and
USGS topographic maps
Slopes
USDA, ARS (Agricultural Research
Service), SCS aerial photos
Land Use
City, county, or regional
planning agency
Vegetation
County agricultural department
Agriculture department at local
university
Soils
General
USDA, SCS, district managers,
Local Extension Service
USGS reports
Geology or Agriculture
Department of local university
Bedrock
General
USGS reports
State Geological Survey reports
Professional geologists in the
area
Geology Department of local
university
General
Water supply department
USGS water supply papers
State or regional water quality
agencies
USDA, SCS
State or federal water resources
agencies
Local health department
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