Owner Name History for Serial Number 521440032008
| 2008-2018 | PRATT, RICHARD W |
| 1993-2007 | PRATT, RICHARD W |
| 1993NV | SUNRIDGE DEVELOPMENT CORPORATION |
| 1989-1992 | BOW VALLEY DEV CORP |
| 1988 | BOW VALLEY DEV CORP |
| 1986-1987 | BOW VALLEY DEV CORP |
| 1981-1985 | BOW VALLEY COAL RESOURCES INC |