# Relationship history for MSHA mine 1516084

Current hierarchy: **Massey Energy Company → High Splint Coal Llc → Mine No 1a**

- 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:** Richard H  Abraham et al → Mine No 1a; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Mine No 1a; 1984-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arch Of Kentucky → Mine No 1a; 1987-06-01 to 1991-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Arch Of Kentucky; 1987-06-01 to 1991-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Talon Resources Inc → Mine No 1a; 1991-08-16 to 1993-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Richard H  Abraham et al → Talon Resources Inc; 1991-08-16 to 1993-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Arch Of Kentucky → Mine No 1a; 1993-01-18 to 1999-10-20; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Arch Of Kentucky; 1993-01-18 to 1999-10-20; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → Mine No 1a; 1999-09-01 to 2010-04-18; source msha-controller-operator-history
- **operator_operates_mine:** High Splint Coal LLC → Mine No 1a; 1999-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → High Splint Coal LLC; 1999-10-21 to 2010-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine No 1a; 2010-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → High Splint Coal LLC; 2010-04-19 to current/open; source msha-controller-operator-history