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Collection: Directories and Documents
Mineral Land Classification of Nevada County, California (1990) (235 pages)
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Page: of 235
PART IV MINERAL LAND CLASSIFICATION,
CONSTRUCTION AGGREGATE RESOURCES
Sand, gravel and crushed stone are "construction materials."
These commodities, collectively called "aggregate" or
"construction aggregate," provide bulk and strength to portland
cement concrete, asphaltic concrete, plaster, and stucco.
Aggregate is also used as road base, subbase, railroad ballast
and fill. Aggregate normally provides 80 to 100 percent of the
material volume in these uses.
Large quantities of aggregate are consumed by the building
and paving industries and future demand for this commodity is
expected to increase throughout California. Aggregate materials
are essential to modern society, both to maintain the existing
infrastructure and to provide for new construction. Therefore,
aggregate materials are a resource of great importance to the
economy of any developing area. Because aggregate is a low unitvalue, high bulk-weight commodity, it must be obtained from
nearby sources to minimize costs to the aggregate consumer. If
nearby sources do not exist, then transportation costs can
quickly exceed the value of the aggregate. In addition to
increasing the cost of aggregate to the consumer, transporting
aggregate from distant sources also results in increased fuel
consumption, air pollution, traffic congestion, and road
maintenance. Transportation cost is the principal constraint
defining the market area for an aggregate operation. These
factors set construction aggregate apart from many other mineral
commodities, such as gold or copper, that may reach markets far
removed from the areas in which they are mined.
TRANSPORTATION RATES
All aggregate marketed in Nevada County is transported by
truck. Minimum rates for independent aggregate truckers are set
by the California Public Utilities Commission (PUC). Rates for
Nevada County are published in "Minimum Rate Tariff 7-A,"
Sections 2 and 3. Charges are calculated based on either an
hourly rate (Table 1) or a distance rate (Table 2). The minimum
hourly rate or the minimum distance rate, whichever is larger,
may be charged to the consumer. If the hourly rate is used, the
carrier and debtor must enter into a written agreement prior to
transport.
Table 2 illustrates how the PUC rates increase with distance
as specified in Minimum Rate Tariff 7-A. For example, hauling
aggregate from the Greenhorn Creek area to Grass Valley
(approximately 11 miles) results in a minimum additional cost of
40