# Relationship history for MSHA mine 1516699

Current hierarchy: **Douglas K  Tackett; James R  Mitchell → T & M Coal Company Llc → #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:** James R  Mitchell → #1; 1987-09-01 to 2000-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Dude Branch Mining Inc → #1; 1989-08-01 to 1999-08-16; source msha-controller-operator-history
- **controller_controls_operator:** James R  Mitchell → Dude Branch Mining Inc; 1989-08-01 to 1999-08-16; source msha-controller-operator-history
- **operator_operates_mine:** T & M Coal Company Llc → #1; 1999-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas K  Tackett et al → #1; 1999-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas K  Tackett et al → T & M Coal Company Llc; 1999-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Mitchell et al → T & M Coal Company Llc; 1999-08-17 to current/open; source msha-controller-operator-history