# Relationship history for MSHA mine 3304267

Current hierarchy: **Edward E  Smock → West Point Mining Corp → #5**

- 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:** Forest Coal Company → #5; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward E  Smock → #5; 1990-07-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Spring Coal Company → #5; 1992-04-01 to 1993-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Forest Coal Company → Mountain Spring Coal Company; 1992-04-01 to 1993-02-11; source msha-controller-operator-history
- **operator_operates_mine:** West Point Mining Corp → #5; 1993-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward E  Smock → West Point Mining Corp; 1993-02-12 to current/open; source msha-controller-operator-history