This classification applies to the crushing or grinding of excavated or quarried materials to produce products that will pass through an 8-mesh screen. If the crushed or ground material is retained on an 8-mesh screen, the crushing or grinding operations shall be classified as 1710, Stone Crushing.
Silica grinding that is performed in connection with sand, gravel or clay digging shall be classified as 4000(1), Sand or Gravel Digging, if 25% or less of the excavated material is crushed or ground. If more than 25% of the excavated material is crushed or ground, all crushing and grinding activities shall be classified as 1741(1) or 1710, Stone Crushing.
Mining or quarrying operations shall be separately classified.
|Shown below is the previously published phraseology and footnote||Effective Date|
Sand or gravel, or clay digging, mining or quarrying shall be separately classified.
The Classification Search was developed by the WCIRB for your convenience to help you identify Standard Classifications based on keywords or a classification code. However, you cannot rely solely on the Classification Search and must make an independent assessment when determining the appropriate classification(s) assignable to a risk in accordance with the USRP.