| Title | Date | Type | Setname | ||
|---|---|---|---|---|---|
| 276 |
 |
Nilfey Tables, Boston Consolidated Mill | 1908-01-14 | Image | dha_scp |
| 277 |
 |
Nisson Stamps, Boston Consolidated Mill | 1908-01-14 | Image | dha_scp |
| 278 |
 |
Office at Ontario drain tunnel #2 | 1922 | Image | pc_hsm |
| 279 |
 |
Ohio Copper Company | 1925; 1921; 1922; 1923; 1924; 1926; 1927; 1928; 1929 | Image | dha_scp |
| 280 |
 |
Ohio Copper Company Mill, Fire Damage | 1918-08-12 | Image | dha_scp |
| 281 |
 |
Ohio Copper Company Mill, Fire Damage | 1918-08-12 | Image | dha_scp |
| 282 |
 |
Ohio Copper Foundation for Tank House | 1919-01-09 | Image | dha_scp |
| 283 |
 |
Ohio Copper Heating Plant | 1919-01-09 | Image | dha_scp |
| 284 |
 |
Ohio Copper Mill | 1909-03-16 | Image | dha_scp |
| 285 |
 |
Ohio Copper Tank House | 1919-01-09 | Image | dha_scp |
| 286 |
 |
Oldsmobile at Arthur Plant | 1920-05-28 | Image | dha_scp |
| 287 |
 |
Ontario Drain Tunnel | 1920; 1921; 1922; 1923; 1924; 1925; 1926; 1927; 1928; 1929; 1930; 1931; 1932; 1933; 1934; 1935; 1936; 1937; 1938; 1939; 1940; 1941; 1942; 1943; 1944; 1945; 1946; 1947; 1948; 1949; 1950; 1951; 1952; 1953; 1954; 1955; 1956; 1957; 1958; 1959 | Image | pc_hsm |
| 288 |
 |
Ontario Mill | 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 |
| 289 |
 |
Ontario Mill in Empire Canyon | 1870; 1871; 1872; 1873; 1874; 1875; 1876; 1877; 1878; 1879; 1880; 1881; 1882; 1883; 1884; 1885; 1886; 1887; 1888; 1889; 1890; 1891; 1892; 1893; 1894; 1895; 1896; 1897; 1898; 1899 | Image | pc_hsm |
| 290 |
 |
Ontario 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 |
| 291 |
 |
Ontario 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 |
| 292 |
 |
Ontario Mine #3 | 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 |
| 293 |
 |
Ontario Mine Shaft #3 | 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 |
| 294 |
 |
Ontario Mines | 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 | Image | pc_hsm |
| 295 |
 |
Ophir | 1903-06-20 | Image | dha_scp |
| 296 |
 |
Ophir - General View West Side of Canyon | 1930; 1926; 1927; 1928; 1929; 1931; 1932; 1933; 1934 | Image | dha_scp |
| 297 |
 |
Ophir Hill Mining Company | 1907-03-10 | Image | dha_scp |
| 298 |
 |
Ophir Mill | 1903 | Image | dha_scp |
| 299 |
 |
Ophir Mine | 1903-06-20 | Image | dha_scp |
| 300 |
 |
Ore Bins, Cactus Mine | 1908-08-06 | Image | dha_scp |