# Relationship history for MSHA mine 1201896

Current hierarchy: **Peabody Energy Corporation → United Minerals Company Llc → Rockport River Terminal**

- 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:** MidAmerican Energy Holdings Company → Rockport River Terminal; 1981-02-13 to 1991-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Spalding George & George Petro → Rockport River Terminal; 1982-06-03 to 1983-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Midnight Sun Coal Company Inc → Rockport River Terminal; 1982-08-01 to 1983-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Spalding George & George Petro → Midnight Sun Coal Company Inc; 1982-08-01 to 1983-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Gremore Ken → Rockport River Terminal; 1983-02-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Midnight Sun Coal Company Inc → Rockport River Terminal; 1983-06-07 to 1985-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Gremore Ken → Midnight Sun Coal Company Inc; 1983-06-07 to 1985-10-16; source msha-controller-operator-history
- **operator_operates_mine:** P-V Mining Company Inc → Rockport River Terminal; 1985-10-17 to 1991-12-31; source msha-controller-operator-history
- **controller_controls_operator:** MidAmerican Energy Holdings Company → P-V Mining Company Inc; 1985-10-17 to 1991-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Rockport River Terminal Inc → Rockport River Terminal; 1992-01-01 to 1994-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Olinger → Rockport River Terminal; 1992-01-01 to 1994-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Olinger → Rockport River Terminal Inc; 1992-01-01 to 1994-05-31; source msha-controller-operator-history
- **operator_operates_mine:** United Minerals Company Llc → Rockport River Terminal; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy et al → Rockport River Terminal; 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_operator:** United Minerals Inc et al → United Minerals Company Llc; 1994-06-01 to 2015-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Rockport River Terminal; 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