TO
| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 276 |
 | Moss, William Francis-Residence P.2 | Image | dha_cp | |
| 277 |
 | Mountain States Telephone and Telegraph Company | 1942-07-08 | Image | dha_cp |
| 278 |
 | Muscatine Mine (Tooele County) P.1 | Image | dha_cp | |
| 279 |
 | New Stockton Mining Company | 1907-04-17 | Image | dha_scp |
| 280 |
 | New Stockton Mining Company | 1907-04-17 | Image | dha_scp |
| 281 |
 | New Stockton Mining Company - 1000 Foot Level | 1907-04-17 | Image | dha_scp |
| 282 |
 | New Stockton Mining Company P.1 | 1907-04-17 | Image | dha_cp |
| 283 |
 | New Stockton Mining Company P.4 | 1907-04-17 | Image | dha_cp |
| 284 |
 | New Stockton Mining Company P.6 | 1907-04-17 | Image | dha_cp |
| 285 |
 | New Stockton Mining Company P.8 | 1907-04-17 | Image | dha_cp |
| 286 |
 | New Stockton Mining Company Plant | 1907-04-17 | Image | dha_scp |
| 287 |
 | Oat Field, Henry Harris, International Smelting and Refining Company | 1917-07-12 | Image | dha_scp |
| 288 |
 | Odometer P.1 | Image | dha_cp | |
| 289 |
 | Ophir | 1903-06-20 | Image | dha_scp |
| 290 |
 | Ophir - General View West Side of Canyon | 1930; 1926; 1927; 1928; 1929; 1931; 1932; 1933; 1934 | Image | dha_scp |
| 291 |
 | Ophir Hill Mining Company | 1907-03-10 | Image | dha_scp |
| 292 |
 | Ophir Mill | 1903 | Image | dha_scp |
| 293 |
 | Ophir Mill P.1 | Image | dha_cp | |
| 294 |
 | Ophir Mine | 1903-06-20 | Image | dha_scp |
| 295 |
 | Ophir Mono Mines Inc. | 1910; 1906; 1907; 1908; 1909; 1911; 1912; 1913; 1914 | Image | dha_scp |
| 296 |
 | Ophir School p.1 | Image | dha_cp | |
| 297 |
 | Ophir, Utah p.1 | 1874-04-11 | Image | dha_cp |
| 298 |
 | Ophir, Utah p.10 | 1974 | Image | dha_cp |
| 299 |
 | Ophir, Utah p.11 | 1974 | Image | dha_cp |
| 300 |
 | Ophir, Utah p.12 | Image | dha_cp |