# Relationship history for MSHA mine 4406651

Current hierarchy: **Alpha Natural Resources, Inc. → Knox Creek Coal Corp → Shady Lane No 4**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** United  Company → Shady Lane No 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ted  Osborne Jr → Shady Lane No 4; 1981-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wellmore Coal Corp → Shady Lane No 4; 1991-07-01 to 1991-09-17; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Wellmore Coal Corp; 1991-07-01 to 1991-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Shady Lane Coal Corp → Shady Lane No 4; 1991-09-18 to 1999-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Osborne Jr → Shady Lane Coal Corp; 1991-09-18 to 1999-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Shady Lane No 4; 1997-08-26 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Knox Creek Coal Corp → Shady Lane No 4; 1999-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Knox Creek Coal Corp; 1999-10-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Shady Lane No 4; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Knox Creek Coal Corp; 2011-06-01 to current/open; source msha-controller-operator-history