Carlton County owns several gravel pits through out the county. Public access is restricted as these pits can be hazardous due to the gravel mining operations, material processing, and heavy equipment traffic. However, there are three County owned pits that are known for the presence of agates.
A permit is available to grant permission to enter the Hatchery Pit, Soo Line Pit and Airport Pit for the purpose of searching for and collecting agates and other semi-precious stones. Restrictions listed in the permit must be adhered to.