# Relationship history for MSHA mine 4406206

Current hierarchy: **James A  Sigmon → Sigmon Coal Company, Inc. → Harlan #5**

- 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:** Westmoreland Coal Company → Harlan #5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Westmoreland Coal Company → Harlan #5; 1985-05-01 to 1996-09-26; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1985-05-01 to 1996-09-26; source msha-controller-operator-history
- **controller_controls_mine:** James A  Sigmon → Harlan #5; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theodore  Yates et al → Harlan #5; 1989-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stoney Gap Coal Company Inc → Harlan #5; 1996-09-27 to 2000-09-21; source msha-controller-operator-history
- **controller_controls_mine:** James A  Simpson → Harlan #5; 1996-09-27 to 2000-09-21; source msha-controller-operator-history
- **controller_controls_operator:** James A  Simpson → Stoney Gap Coal Company Inc; 1996-09-27 to 2000-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Har-Lee Coal Company Inc → Harlan #5; 2000-09-22 to 2002-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Yates et al → Har-Lee Coal Company Inc; 2000-09-22 to 2002-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Company, Inc. → Harlan #5; 2002-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Company, Inc.; 2002-07-09 to current/open; source msha-controller-operator-history