# Relationship history for MSHA mine 1202133

Current hierarchy: **Peabody Energy Corporation → United Minerals Company Llc → West Fork**

- 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:** Greg  Olinger → West Fork; 1979-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United Minerals Inc → West Fork; 1993-03-01 to 1994-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Olinger → United Minerals Inc; 1993-03-01 to 1994-05-31; source msha-controller-operator-history
- **operator_operates_mine:** United Minerals Company Llc → West Fork; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** United Minerals Inc et al → West Fork; 1994-06-01 to 2015-12-30; source msha-controller-operator-history
- **controller_controls_operator:** United Minerals Inc et al → United Minerals Company Llc; 1994-06-01 to 2015-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy et al → United Minerals Company Llc; 1994-06-01 to 2015-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → West Fork; 2015-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → United Minerals Company Llc; 2015-12-31 to current/open; source msha-controller-operator-history