Note 11 - Self-insurance

6 Months Ended

Jun. 30, 2021

Notes to Financial Statements

Self Insurance [Text Block]

(11) SELF-INSURANCE

We self-insure our underground mining equipment. Such equipment is allocated among seven mining units dispersed over ten miles. The historical cost of such equipment was approximately $275 million and $269 million as of June 30, 2021, and December 31, 2020, respectively.

Restricted cash of $3.5 million and $4.0 million as of June 30, 2021, and December 31, 2020, respectively, represents cash held and controlled by a third party and is restricted for future workers’ compensation claim payments.