Document Format Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 1 | FORM 8-K | tm247014d1_8k.htm iXBRL | 8-K | 28831 |
| 2 | EXHIBIT 99.1 | tm247014d1_ex99-1.htm | EX-99.1 | 77609 |
| 6 | GRAPHIC | tm247014d1_ex99-1img001.jpg | GRAPHIC | 168941 |
| 7 | GRAPHIC | tm247014d1_ex99-1img002.jpg | GRAPHIC | 349248 |
| 8 | GRAPHIC | tm247014d1_ex99-1img003.jpg | GRAPHIC | 163289 |
| 9 | GRAPHIC | tm247014d1_ex99-1img004.jpg | GRAPHIC | 118122 |
| 10 | GRAPHIC | tm247014d1_ex99-1img005.jpg | GRAPHIC | 173698 |
| 11 | GRAPHIC | tm247014d1_ex99-1img006.jpg | GRAPHIC | 91739 |
| 12 | GRAPHIC | tm247014d1_ex99-1img007.jpg | GRAPHIC | 188592 |
| 13 | GRAPHIC | tm247014d1_ex99-1img008.jpg | GRAPHIC | 153075 |
| 14 | GRAPHIC | tm247014d1_ex99-1img009.jpg | GRAPHIC | 175657 |
| 15 | GRAPHIC | tm247014d1_ex99-1img010.jpg | GRAPHIC | 198220 |
| 16 | GRAPHIC | tm247014d1_ex99-1img011.jpg | GRAPHIC | 145353 |
| 17 | GRAPHIC | tm247014d1_ex99-1img012.jpg | GRAPHIC | 115492 |
| 18 | GRAPHIC | tm247014d1_ex99-1img013.jpg | GRAPHIC | 88445 |
| 19 | GRAPHIC | tm247014d1_ex99-1img014.jpg | GRAPHIC | 94010 |
| 20 | GRAPHIC | tm247014d1_ex99-1img015.jpg | GRAPHIC | 168669 |
| 21 | GRAPHIC | tm247014d1_ex99-1img016.jpg | GRAPHIC | 126259 |
| 22 | GRAPHIC | tm247014d1_ex99-1img017.jpg | GRAPHIC | 124237 |
| 23 | GRAPHIC | tm247014d1_ex99-1img018.jpg | GRAPHIC | 162623 |
| 24 | GRAPHIC | tm247014d1_ex99-1img019.jpg | GRAPHIC | 129118 |
| 25 | GRAPHIC | tm247014d1_ex99-1img020.jpg | GRAPHIC | 130784 |
| 26 | GRAPHIC | tm247014d1_ex99-1img021.jpg | GRAPHIC | 257714 |
| 27 | GRAPHIC | tm247014d1_ex99-1img022.jpg | GRAPHIC | 128044 |
| 28 | GRAPHIC | tm247014d1_ex99-1img023.jpg | GRAPHIC | 119914 |
| 29 | GRAPHIC | tm247014d1_ex99-1img024.jpg | GRAPHIC | 201397 |
| 30 | GRAPHIC | tm247014d1_ex99-1img025.jpg | GRAPHIC | 226573 |
| 31 | GRAPHIC | tm247014d1_ex99-1img026.jpg | GRAPHIC | 115824 |
| 32 | GRAPHIC | tm247014d1_ex99-1img027.jpg | GRAPHIC | 138559 |
| 33 | GRAPHIC | tm247014d1_ex99-1img028.jpg | GRAPHIC | 173843 |
| 34 | GRAPHIC | tm247014d1_ex99-1img029.jpg | GRAPHIC | 82389 |
| 35 | GRAPHIC | tm247014d1_ex99-1img030.jpg | GRAPHIC | 168495 |
| 36 | GRAPHIC | tm247014d1_ex99-1img031.jpg | GRAPHIC | 151887 |
| 37 | GRAPHIC | tm247014d1_ex99-1img032.jpg | GRAPHIC | 200472 |
| 38 | GRAPHIC | tm247014d1_ex99-1img033.jpg | GRAPHIC | 230402 |
| 39 | GRAPHIC | tm247014d1_ex99-1img034.jpg | GRAPHIC | 124688 |
| 40 | GRAPHIC | tm247014d1_ex99-1img035.jpg | GRAPHIC | 155942 |
| 41 | GRAPHIC | tm247014d1_ex99-1img036.jpg | GRAPHIC | 187960 |
| 42 | GRAPHIC | tm247014d1_ex99-1img037.jpg | GRAPHIC | 178247 |
| 43 | GRAPHIC | tm247014d1_ex99-1img038.jpg | GRAPHIC | 173272 |
| 44 | GRAPHIC | tm247014d1_ex99-1img039.jpg | GRAPHIC | 146439 |
| 45 | GRAPHIC | tm247014d1_ex99-1img040.jpg | GRAPHIC | 159920 |
| 46 | GRAPHIC | tm247014d1_ex99-1img041.jpg | GRAPHIC | 146306 |
| 47 | GRAPHIC | tm247014d1_ex99-1img042.jpg | GRAPHIC | 129509 |
| Complete submission text file | 0001104659-24-027295.txt | 9487913 |
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 3 | XBRL TAXONOMY EXTENSION SCHEMA | arch-20240226.xsd | EX-101.SCH | 3015 |
| 4 | XBRL TAXONOMY EXTENSION LABEL LINKBASE | arch-20240226_lab.xml | EX-101.LAB | 34240 |
| 5 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE | arch-20240226_pre.xml | EX-101.PRE | 22359 |
| 58 | EXTRACTED XBRL INSTANCE DOCUMENT | tm247014d1_8k_htm.xml | XML | 3621 |
IRS No.: 430921172 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-13105 | Film No.: 24673591
SIC: 1221 Bituminous Coal & Lignite Surface Mining
(CF Office: 01 Energy & Transportation)