# Relationship history for MSHA mine 1516211

Current hierarchy: **Charles E  Walker → Oak Ridge Energy Inc. → No. 1**

- 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:** Dianna  Meade → No. 1; 1987-01-06 to 1992-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Little D Coal Company Inc → No. 1; 1987-10-01 to 1992-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Dianna  Meade → Little D Coal Company Inc; 1987-10-01 to 1992-09-22; source msha-controller-operator-history
- **operator_operates_mine:** C G M Coal Company Inc → No. 1; 1992-09-23 to 2000-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Wheeler William → No. 1; 1992-09-23 to 2000-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Wheeler William → C G M Coal Company Inc; 1992-09-23 to 2000-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Blackbird Coal Company Inc → No. 1; 2000-08-01 to 2001-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Eddie D  Lawson et al → No. 1; 2000-08-01 to 2001-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Eddie D  Lawson et al → Blackbird Coal Company Inc; 2000-08-01 to 2001-08-21; source msha-controller-operator-history
- **operator_operates_mine:** E-Z Mining Inc → No. 1; 2001-08-22 to 2009-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Wheeler William → No. 1; 2001-08-22 to 2002-01-28; source msha-controller-operator-history
- **controller_controls_operator:** Wheeler William → E-Z Mining Inc; 2001-08-22 to 2002-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Golden  Sandlin → No. 1; 2002-01-29 to 2003-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Golden  Sandlin → E-Z Mining Inc; 2002-01-29 to 2003-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Banks → No. 1; 2003-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Banks → E-Z Mining Inc; 2003-08-18 to 2009-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Oak Ridge Energy Inc. → No. 1; 2009-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles E  Walker → No. 1; 2009-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles E  Walker → Oak Ridge Energy Inc.; 2009-06-04 to current/open; source msha-controller-operator-history