Document Format Files
Data Files
Seq | Description | Document | Type | Size |
---|---|---|---|---|
158 | EX-101.SCH | arch-20211231.xsd | EX-101.SCH | 102931 |
159 | EX-101.CAL | arch-20211231_cal.xml | EX-101.CAL | 140675 |
160 | EX-101.DEF | arch-20211231_def.xml | EX-101.DEF | 428003 |
161 | EX-101.LAB | arch-20211231_lab.xml | EX-101.LAB | 988523 |
162 | EX-101.PRE | arch-20211231_pre.xml | EX-101.PRE | 772934 |
286 | EXTRACTED XBRL INSTANCE DOCUMENT | arch-20211231x10k_htm.xml | XML | 4305789 |
IRS No.: 430921172 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-13105 | Film No.: 22642390
SIC: 1221 Bituminous Coal & Lignite Surface Mining