# Relationship history for MSHA mine 1202008

Current hierarchy: **Peabody Energy Corporation → United Minerals Company Llc → Rio Grande**

- 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:** Shand Alexander (Holdings) Ltd → Rio Grande; 1983-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & Ls Contracting Inc → Rio Grande; 1987-07-01 to 1995-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Shand Alexander (Holdings) Ltd → B & Ls Contracting Inc; 1987-07-01 to 1995-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Black Beauty Resources → Rio Grande; 1991-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy et al → Rio Grande; 1994-06-01 to 2015-12-30; source msha-controller-operator-history
- **operator_operates_mine:** Black Beauty Mining Inc → Rio Grande; 1995-01-20 to 1995-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Black Beauty Resources → Black Beauty Mining Inc; 1995-01-20 to 1995-08-07; source msha-controller-operator-history
- **operator_operates_mine:** United Minerals Company Llc → Rio Grande; 1995-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy et al → United Minerals Company Llc; 1995-08-08 to 2015-12-30; source msha-controller-operator-history
- **controller_controls_operator:** United Minerals Inc et al → United Minerals Company Llc; 1995-08-08 to 2015-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Rio Grande; 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