# Relationship history for MSHA mine 4406781

Current hierarchy: **James A  Sigmon → Sigmon Coal Company, Inc. → Harlan #6**

- 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:** James A  Sigmon → Harlan #6; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stacy  Roberts → Harlan #6; 1994-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cns Mining Inc → Harlan #6; 1994-10-01 to 1995-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Stacy  Roberts → Cns Mining Inc; 1994-10-01 to 1995-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Calvin Mining Corp → Harlan #6; 1995-07-11 to 1995-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Clayton V  Roberts → Harlan #6; 1995-07-11 to 1995-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Clayton V  Roberts → Calvin Mining Corp; 1995-07-11 to 1995-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Lee-Coal Mining Inc → Harlan #6; 1995-08-30 to 1999-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Eric D  Ball → Harlan #6; 1995-08-30 to 1999-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Eric D  Ball → Lee-Coal Mining Inc; 1995-08-30 to 1999-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Joey  Taylor → Harlan #6; 1999-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nova Fuels Inc → Harlan #6; 1999-08-16 to 2001-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Ball James T → Harlan #6; 1999-08-16 to 2001-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Ball James T → Nova Fuels Inc; 1999-08-16 to 2001-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Hunter → Harlan #6; 2000-04-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hunter Coales Llc → Harlan #6; 2001-03-29 to 2002-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Hunter → Hunter Coales Llc; 2001-03-29 to 2002-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Co., Inc. → Harlan #6; 2002-01-04 to 2002-01-17; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Co., Inc.; 2002-01-04 to 2002-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Solid Fuel Energy, LTD → Harlan #6; 2002-01-18 to 2002-03-21; source msha-controller-operator-history
- **controller_controls_mine:** Larry E  Wright → Harlan #6; 2002-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry E  Wright → Solid Fuel Energy, LTD; 2002-01-18 to 2002-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Co., Inc. → Harlan #6; 2002-03-22 to 2002-05-08; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Co., Inc.; 2002-03-22 to 2002-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Grace Mining Inc. → Harlan #6; 2002-05-09 to 2002-10-16; source msha-controller-operator-history
- **controller_controls_operator:** Joey  Taylor → Grace Mining Inc.; 2002-05-09 to 2002-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Company, Inc. → Harlan #6; 2002-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Company, Inc.; 2002-10-17 to current/open; source msha-controller-operator-history