| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 151 |
 | Lion Coal, Shaft with Ore Car | 1921-03-04 | Image | dha_scp |
| 152 |
 | Lion Coal, Wattis, Miners | 1921-03-09 | Image | dha_scp |
| 153 |
 | Lion Coal, Wattis, Utah, Loading Coal in Ore Car | 1921-03-09 | Image | dha_scp |
| 154 |
 | Lunch for Mine Rescue Team (Sunnyside, Utah), 1920 | 1920 | Image | dha_eftl |
| 155 |
 | Lunch time for pipefitter working on coke oven construction | 1942; 1943 | Image | dha_eftl |
| 156 |
 | Machinery and equipment | 1975 | Image | dha_eftl |
| 157 |
 | Mammoth, Utah p.13 | Image | dha_cp | |
| 158 |
 | Mammoth, Utah-Life and Customs p.1 | Image | dha_cp | |
| 159 |
 | Man in automobile, Utah Copper Plant in background. | Image | dha_eftl | |
| 160 |
 | Man With Wheelbarrow | 1912-05-29 | Image | dha_scp |
| 161 |
 | Map of the West of the United States, captioned "Trade Trails ca. 1835" | 1835 | uum_map | |
| 162 |
 | Map showing Dominguez-Escalante Trail | 1990; 1991; 1992; 1993; 1994; 1995; 1996; 1997; 1998; 1999 | uum_map | |
| 163 |
 | Mass meeting flier, near Carbon County, Utah | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940 | Text | uum_csr |
| 164 |
 | Mass meeting protest notice, National Miners Union, Helper, Utah | 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940 | Text | uum_csr |
| 165 |
 | Mass protest meeting flier, Carbon County, Utah, 1933 September 15 | 1933-09-15 | Text | uum_csr |
| 166 |
 | Matt Connelly climbing ladder in drift | 1883; 1884; 1885; 1886; 1887; 1888; 1889; 1890; 1891; 1892; 1893; 1894; 1895; 1896; 1897; 1898; 1899; 1900; 1901; 1902; 1903; 1904; 1905; 1906; 1907; 1908 | Image | pc_hsm |
| 167 |
 | Men in double cage | 1880; 1881; 1882; 1883; 1884; 1885; 1886; 1887; 1888; 1889; 1890; 1891; 1892; 1893; 1894; 1895; 1896; 1897; 1898; 1899; 1900; 1901; 1902; 1903; 1904; 1905; 1906; 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920 | Image | pc_hsm |
| 168 |
 | Men inside mine building | 1880; 1881; 1882; 1883; 1884; 1885; 1886; 1887; 1888; 1889; 1890; 1891; 1892; 1893; 1894; 1895; 1896; 1897; 1898; 1899; 1900; 1901; 1902; 1903; 1904; 1905; 1906; 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; ... | Image | pc_hsm |
| 169 |
 | Men underground in mine | 1880; 1881; 1882; 1883; 1884; 1885; 1886; 1887; 1888; 1889; 1890; 1891; 1892; 1893; 1894; 1895; 1896; 1897; 1898; 1899; 1900; 1901; 1902; 1903; 1904; 1905; 1906; 1907; 1908; 1909; 1910; 1911; 1912; 1913; 1914; 1915; 1916; 1917; 1918; 1919; 1920 | Image | pc_hsm |
| 170 |
 | Midwest Pipe Co employee with pipe wrench during Coke oven construction | 1942; 1943 | Image | dha_eftl |
| 171 |
 | Midwest Pipe Co employees assembling pipe during Coke oven construction | 1942; 1943 | Image | dha_eftl |
| 172 |
 | Midwest Pipe Co employees during Coke oven construction | 1942; 1943 | Image | dha_eftl |
| 173 |
 | Mine | 1910; 1906; 1907; 1908; 1909; 1911; 1912; 1913; 1914 | Image | dha_scp |
| 174 |
 | Mine Dump | 1917-08-31 | Image | dha_scp |
| 175 |
 | Mine horse and driver at work #2 Mine (Castle Gate, Utah), n.d. | Image | dha_eftl |