# Relationship history for MSHA mine 1513336

Current hierarchy: **Damian  Caldwell → Mountainside Coal Company Inc → #1 Surface**

- 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:** Laird T  Orr Jr. → #1 Surface; 1978-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Hill Mining Inc → #1 Surface; 1982-01-01 to 1989-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Laird T  Orr Jr. → Green Hill Mining Inc; 1982-01-01 to 1989-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Chambers et al → #1 Surface; 1983-09-01 to 2013-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Mountainside Coal Company Inc → #1 Surface; 1989-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Chambers et al → Mountainside Coal Company Inc; 1989-05-31 to 2013-10-06; source msha-controller-operator-history
- **controller_controls_mine:** River Energy JV UK Limited → #1 Surface; 2013-10-07 to 2021-04-15; source msha-controller-operator-history
- **controller_controls_operator:** River Energy JV UK Limited → Mountainside Coal Company Inc; 2013-10-07 to 2021-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Damian  Caldwell → #1 Surface; 2021-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Damian  Caldwell → Mountainside Coal Company Inc; 2021-04-16 to current/open; source msha-controller-operator-history