SIC 1422 Crushed and Broken Limestone

Contenidos

• NAICS CODE(S).
• FURTHER READING.

SIC 1422

This industry consists of establishments primarily engaged in mining or quarrying crushed and broken limestone, including related rocks, such as dolomite, cement rock, marl, travertine and calcareous tufa. Also included are establishments primarily engaged in the grinding or pulverizing of limestone, but establishments primarily engaged in producing lime are classified in SIC 3274: Lime.

NAICS CODE(S)

212312

Crushed and Broken Limestone Mining and Quarrying

Crushed limestone production is the largest of three related industries that extract and process nonfuel, nonmetallic minerals. Primarily employed as aggregate, which refers to a wide number of sand, gravel, and stone mixtures, crushed stone is an essential component of the U.S. infrastructure because of its use in the construction of highways, airports, river locks and dams, railroad ballast, and breakwaters. It is, however, considered a "high-volume, low-value commodity" with relatively stable prices since the 1970s, according to the U.S. Geological Survey.

The crushed stone industry is the largest nonfuel mining industry in the United States, with 3,100 active quarries, 70 underground mines, and 190 sales/distribution yards in 49 states as of 2005. Limestone and dolomite...