| Gehl, John; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1926 Red Book | 1926 Red Book | | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | WALTER D. | Chief Engineer |
| Gehl, John; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1939 Red Book; 1939 | 1939 Red Book | 1939-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1941 Red Book; 1941 | 1941 Red Book | 1941-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1942 Red Book; 1942 | 1942 Red Book | 1942-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1943 Red Book; 1943 | 1943 Red Book | 1943-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1944 Red Book; 1944 | 1944 Red Book | 1944-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1945 Red Book; 1945 | 1945 Red Book | 1945-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1946 Red Book; 1946 | 1946 Red Book | 1946-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1947 Red Book; 1947 | 1947 Red Book | 1947-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1948 Red Book; 1948 | 1948 Red Book | 1948-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1949 Red Book; 1949 | 1949 Red Book | 1949-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1950 Red Book; 1950 | 1950 Red Book | 1950-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1951 Red Book; 1951 | 1951 Red Book | 1951-00-00 | JAMES WHALEN | Chief Engineer |
| Gehl, John; 1952 Red Book; 1952 | 1952 Red Book | 1952-00-00 | JAMES WHALEN | Chief Engineer |