# Relationship history for MSHA mine 1518459

Current hierarchy: **Shaun  Allen → Appalachian Highwall Mining Ltd → Shepherd Branch No 1**

- 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:** Terry C  Marshall  et al → Shepherd Branch No 1; 2001-06-01 to 2015-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Highwall Mining Ltd → Shepherd Branch No 1; 2001-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry C  Marshall  et al → Appalachian Highwall Mining Ltd; 2001-10-11 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Claude W  Allen  et al → Appalachian Highwall Mining Ltd; 2001-10-11 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Shaun  Allen → Shepherd Branch No 1; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shaun  Allen → Appalachian Highwall Mining Ltd; 2016-01-01 to current/open; source msha-controller-operator-history