# Relationship history for MSHA mine 4406917

Current hierarchy: **James A  Sigmon → Sigmon Coal Company, Inc. → #8 Mine**

- 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 → #8 Mine; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theodore  Yates et al → #8 Mine; 1989-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Energy Llc → #8 Mine; 1998-07-01 to 1999-06-22; source msha-controller-operator-history
- **controller_controls_mine:** James A  Sigmon → #8 Mine; 1998-07-01 to 1999-06-23; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Energy Llc; 1998-07-01 to 1999-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Stanley R  Ditty → #8 Mine; 1999-03-01 to 2001-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Brandon Enterprises Llc → #8 Mine; 1999-06-23 to 2001-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Stanley R  Ditty → Brandon Enterprises Llc; 1999-06-23 to 2001-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Border Mining Inc → #8 Mine; 2001-09-18 to 2002-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Suzie  Fought → #8 Mine; 2001-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Suzie  Fought → Border Mining Inc; 2001-09-18 to 2002-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Har-Lee Coal Co., Inc. → #8 Mine; 2002-04-01 to 2004-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Yates et al → Har-Lee Coal Co., Inc.; 2002-04-01 to 2004-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Napier et al → #8 Mine; 2004-07-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harlan Fuel Co LLC → #8 Mine; 2004-08-10 to 2006-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Napier et al → Harlan Fuel Co LLC; 2004-08-10 to 2006-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Connie  Napier  et al → Harlan Fuel Co LLC; 2004-08-10 to 2006-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Company, Inc. → #8 Mine; 2006-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Company, Inc.; 2006-01-05 to current/open; source msha-controller-operator-history