# Relationship history for MSHA mine 4406629

Current hierarchy: **Glenn K  Mitchell; Marty  Fuller → Cove Coal Co., 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Hay Walker W Et Al → No 1; 1983-08-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D O & W Coal Company Inc → No 1; 1991-02-01 to 1998-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Hay Walker W Et Al → D O & W Coal Company Inc; 1991-02-01 to 1998-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Bill D  Calloway → No 1; 1995-10-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & O Mining Company Inc → No 1; 1998-08-11 to 2000-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Bill D  Calloway → C & O Mining Company Inc; 1998-08-11 to 2000-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Cove Coal Co., Inc. → No 1; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eugene  Ball → No 1; 2000-04-01 to 2002-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Eugene  Ball → Cove Coal Co., Inc.; 2000-04-01 to 2002-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey  Cline → No 1; 2002-09-03 to 2004-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Cline → Cove Coal Co., Inc.; 2002-09-03 to 2004-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Marty  Fuller  et al → No 1; 2004-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marty  Fuller  et al → Cove Coal Co., Inc.; 2004-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn K  Mitchell  et al → Cove Coal Co., Inc.; 2004-07-26 to current/open; source msha-controller-operator-history