# Relationship history for MSHA mine 4607289

Current hierarchy: **Westmoreland Coal Company → Westmoreland Coal Company → Hampton No 42 Mine**

- 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:** Westmoreland Coal Company → Hampton No 42 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Awv Finance Corp Et Al → Hampton No 42 Mine; 1980-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Long Branch Energy → Hampton No 42 Mine; 1987-04-01 to 1989-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Awv Finance Corp Et Al → Long Branch Energy; 1987-04-01 to 1989-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Long Branch Energy → Hampton No 42 Mine; 1989-03-01 to 1994-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Long Branch Energy Corporation → Hampton No 42 Mine; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Long Branch Energy Corporation → Long Branch Energy; 1989-03-01 to 1994-10-19; source msha-controller-operator-history
- **operator_operates_mine:** Westmoreland Coal Company → Hampton No 42 Mine; 1994-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1994-10-20 to current/open; source msha-controller-operator-history