From Appendix 5 and 6 of The Iron and Steel Industry of West Cumberland, by J Y Lancaster and D R Wattleworth, with the author’s permission
Corus Rail, Workington (J.Bennett)
| Date | Cumberland Pig Iron Output (Tons) | Cumberland Bessemer Steel Production (Tons) | |
| 1856 | 25,530 | ||
| 1859 | 50,097 | ||
| 1862 | 103,455 | ||
| 1864 | 141,033 | ||
| 1869 | 129,107 | ||
| 1873 | 456,877 | ||
| 1880 | 790,343 | 1879 | 127,163 |
| 1882 | 1,001,181 | 1882 | 191,326 |
| 1890 | 832,614 | 1888 | 406,354 |
| 1900 | 856,851 | 1898 | 580,933 |
| 1906 | 886,802 | 1905 | 581,120 |
| 1913 | 696,817 | 1913 | 205,351 |
| 1924 | 751,600 | 1924 | 83,700 |
| 1930 | 720,200 | 1935 | 199,200 |
| 1937 | 825,000 | 1938 | 232,800 |
| 1947 | 703,300 | 1947 | 218,300 |
| 1956 | 1,116,000 | 1956 | 230,000 |
| 1963 | 630,100 | 1960 | 294,400 |
| 1964 | 764,200 | 1964 | 291,000 |
| 1969 | 571,500 | 1969 | 257,100 |
| 1970 | 576,597 | 1970 | 279,205 |
| 1975 | 568,749 | 1974 | 231,085 |
(Page created 11/05/09)