# Relationship history for MSHA mine 0500266

Current hierarchy: **GCC SAB de CV → GCC Energy LLC → King I**

- 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:** Irving A Smith-Operator → King I; 1950-01-01 to 1976-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Irving A  Smith → King I; 1950-01-01 to 1976-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Irving A  Smith → Irving A Smith-Operator; 1950-01-01 to 1976-11-22; source msha-controller-operator-history
- **operator_operates_mine:** Henrietta Mines Inc → King I; 1976-11-23 to 1978-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Henrietta Mines Ltd → King I; 1976-11-23 to 1978-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Henrietta Mines Ltd → Henrietta Mines Inc; 1976-11-23 to 1978-01-10; source msha-controller-operator-history
- **operator_operates_mine:** National King Coal Inc → King I; 1978-01-11 to 1995-06-29; source msha-controller-operator-history
- **controller_controls_mine:** William C  Kirkwood → King I; 1978-01-11 to 1995-06-29; source msha-controller-operator-history
- **controller_controls_operator:** William C  Kirkwood → National King Coal Inc; 1978-01-11 to 1995-06-29; source msha-controller-operator-history
- **operator_operates_mine:** National King Coal, LLC → King I; 1995-06-30 to 2005-04-13; source msha-controller-operator-history
- **controller_controls_mine:** Amci Llc Of Co & Ns Resources Of Co → King I; 1995-06-30 to 2003-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Amci Llc Of Co & Ns Resources Of Co → National King Coal, LLC; 1995-06-30 to 2003-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → King I; 2003-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → National King Coal, LLC; 2003-03-12 to 2005-04-13; source msha-controller-operator-history
- **operator_operates_mine:** GCC Energy LLC → King I; 2005-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** GCC SAB de CV → King I; 2005-04-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** GCC SAB de CV → GCC Energy LLC; 2005-04-14 to current/open; source msha-controller-operator-history