The purpose of the Sand & Gravel General Permit is to control the discharge of pollutants from sand and gravel mining operations and related facilities into waters of the state. This general permit provides coverage for discharges of process water, stormwater, and mine dewatering water associated with sand and gravel operations, rock quarries and similar mining activities, including stockpiles of mined materials, concrete batch operations, and hot mix asphalt operations. The permit authorizes wastewater discharges to waters of the State of Washington subject to the permit conditions.

Activities that Require a Permit

Those facilities with industrial activities designated by the following Standard Industrial Classification (SIC) codes are subject to coverage under the sand and gravel general permit:

0811 Timber Tracts (sand and gravel point source activities)
1411 Dimension Stone
1422 Crushed and Broken Limestone
1423 Crushed and Broken Granite
1429 Crushed and Broken Stone, Not Elsewhere Classified
1442 Construction Sand and Gravel
1446 Industrial Sand
1455 Kaolin and Ball Clay
1459 Clay, Ceramic, and Refractory Minerals, Not Otherwise Classified
1499 Miscellaneous Nonmetallic Minerals, Except Fuels
2411 Logging (sand and gravel point source activities)
2951 Asphalt Paving Mixtures and Blocks
3273 Ready-Mixed Concrete

In addition to the activities listed above, Ecology may require similar activities (e.g. SIC 3272 - Concrete Products) to obtain coverage under this general permit.

Your facility may require additional permits

Please follow the link to the Environmental Permit Handbook. This site will direct you to information about other state and local permits, approvals and licenses that may apply. Required permits may include:

For questions about these and other permits, go to Office of Regulatory Assistance.