December 31,

2025

2024

Mining properties, including asset retirement obligations

$

1,080,946

$

958,858

Development costs

719,186

671,741

Plants and equipment

1,879,231

1,805,236

Land

32,962

35,680

Mineral interests

1,150,514

1,166,045

Construction in progress

144,992

66,566

5,007,831

4,704,126

Less accumulated depreciation, depletion and amortization

2,167,004

2,010,007

Net carrying value

$

2,840,827

$

2,694,119