# Relationship history for MSHA mine 2400839

Current hierarchy: **Lighthouse Resources Inc → Decker Coal Company → Decker Mine**

- 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

- **operator_operates_mine:** Decker Coal Company → Decker Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ambre Energy Limited et al → Decker Mine; 1950-01-01 to 2014-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Ambre Energy Limited et al → Decker Coal Company; 1950-01-01 to 2014-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Cloud Peak Energy et al → Decker Coal Company; 1950-01-01 to 2014-09-24; source msha-controller-operator-history
- **controller_controls_mine:** Ambre Energy Limited → Decker Mine; 2014-09-25 to 2015-04-12; source msha-controller-operator-history
- **controller_controls_operator:** Ambre Energy Limited → Decker Coal Company; 2014-09-25 to 2015-04-12; source msha-controller-operator-history
- **controller_controls_mine:** Lighthouse Resources Inc → Decker Mine; 2015-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lighthouse Resources Inc → Decker Coal Company; 2015-04-13 to current/open; source msha-controller-operator-history