Income Taxes	6 Months Ended
Jun. 30, 2017
Income Taxes
Income Taxes	9. Income Taxes The Company has estimated that its effective income tax rate for 2017 will be approximately 20.3%. The primary reasons for the effective rate being below the federal statutory rate is due to statutory depletion, which is allowed for income tax purposes and is a permanent difference between net income for financial reporting purposes and taxable income, and income tax credits associated with the ongoing construction of the St. Clair kiln project.

Income Taxes

6 Months Ended

Jun. 30, 2017

9. Income Taxes

The Company has estimated that its effective income tax rate for 2017 will be approximately 20.3%. The primary reasons for the effective rate being below the federal statutory rate is due to statutory depletion, which is allowed for income tax purposes and is a permanent difference between net income for financial reporting purposes and taxable income, and income tax credits associated with the ongoing construction of the St. Clair kiln project.