# Relationship history for MSHA mine 1519721

Current hierarchy: **James Eric  Davidson → Reckoning Reclamation, LLC. → Job #57**

- 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:** TECO Energy Inc → Job #57; 1991-12-02 to 2015-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Premier Elkhorn Coal Company, LLC → Job #57; 2013-09-24 to 2020-01-12; source msha-controller-operator-history
- **controller_controls_operator:** TECO Energy Inc → Premier Elkhorn Coal Company, LLC; 2013-09-24 to 2015-09-20; source msha-controller-operator-history
- **controller_controls_mine:** James H  Booth et al → Job #57; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_operator:** James H  Booth et al → Premier Elkhorn Coal Company, LLC; 2015-09-21 to 2019-06-15; source msha-controller-operator-history
- **controller_controls_mine:** J Mark  Campbell → Job #57; 2019-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Mark  Campbell → Premier Elkhorn Coal Company, LLC; 2019-06-16 to 2020-01-12; source msha-controller-operator-history
- **controller_controls_mine:** William K  Abraham → Job #57; 2019-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virgie Clean Mining → Job #57; 2020-01-13 to 2025-06-15; source msha-controller-operator-history
- **controller_controls_operator:** William K  Abraham → Virgie Clean Mining; 2020-01-13 to 2025-06-15; source msha-controller-operator-history
- **controller_controls_mine:** James Eric  Davidson → Job #57; 2024-02-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Reckoning Reclamation, LLC. → Job #57; 2025-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Eric  Davidson → Reckoning Reclamation, LLC.; 2025-06-16 to current/open; source msha-controller-operator-history