| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 251 |
 | Miscellaneous Residences P.10 | 1913-06-21 | Image | dha_cp |
| 252 |
 | Morton Salt Company P.1 | 1963-06 | Image | dha_cp |
| 253 |
 | Moss, William Francis-Residence P.1 | Image | dha_cp | |
| 254 |
 | Moss, William Francis-Residence P.2 | Image | dha_cp | |
| 255 |
 | Mountain States Telephone and Telegraph Company | 1942-07-08 | Image | dha_cp |
| 256 |
 | Muscatine Mine (Tooele County) P.1 | Image | dha_cp | |
| 257 |
 | New Stockton Mining Company | 1907-04-17 | Image | dha_scp |
| 258 |
 | New Stockton Mining Company | 1907-04-17 | Image | dha_scp |
| 259 |
 | New Stockton Mining Company - 1000 Foot Level | 1907-04-17 | Image | dha_scp |
| 260 |
 | New Stockton Mining Company P.1 | 1907-04-17 | Image | dha_cp |
| 261 |
 | New Stockton Mining Company P.4 | 1907-04-17 | Image | dha_cp |
| 262 |
 | New Stockton Mining Company P.6 | 1907-04-17 | Image | dha_cp |
| 263 |
 | New Stockton Mining Company P.8 | 1907-04-17 | Image | dha_cp |
| 264 |
 | New Stockton Mining Company Plant | 1907-04-17 | Image | dha_scp |
| 265 |
 | Oat Field, Henry Harris, International Smelting and Refining Company | 1917-07-12 | Image | dha_scp |
| 266 |
 | Odometer P.1 | Image | dha_cp | |
| 267 |
 | Ophir | 1903-06-20 | Image | dha_scp |
| 268 |
 | Ophir - General View West Side of Canyon | 1930; 1926; 1927; 1928; 1929; 1931; 1932; 1933; 1934 | Image | dha_scp |
| 269 |
 | Ophir Hill Mining Company | 1907-03-10 | Image | dha_scp |
| 270 |
 | Ophir Mill | 1903 | Image | dha_scp |
| 271 |
 | Ophir Mill P.1 | Image | dha_cp | |
| 272 |
 | Ophir Mine | 1903-06-20 | Image | dha_scp |
| 273 |
 | Ophir Mono Mines Inc. | 1910; 1906; 1907; 1908; 1909; 1911; 1912; 1913; 1914 | Image | dha_scp |
| 274 |
 | Ophir School p.1 | Image | dha_cp | |
| 275 |
 | Ophir, Utah p.1 | 1874-04-11 | Image | dha_cp |