# Relationship history for MSHA mine 4002966

Current hierarchy: **Chester  Franklin → Dalco Coal Of Tennessee Llc → Mine #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:** Donald C  Seiber et al → Mine #1; 1978-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Dean Mining Inc → Mine #1; 1987-12-01 to 1991-04-28; source msha-controller-operator-history
- **controller_controls_operator:** Donald C  Seiber et al → Tri-Dean Mining Inc; 1987-12-01 to 1991-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Dean Mining Inc → Mine #1; 1991-04-29 to 1992-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Harvey E  Ward et al → Mine #1; 1991-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harvey E  Ward et al → Tri-Dean Mining Inc; 1991-04-29 to 1992-02-13; source msha-controller-operator-history
- **operator_operates_mine:** West Prg 1 Inc → Mine #1; 1992-02-14 to 1998-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Onyx International Inc & Coalfield Consultants Inc → Mine #1; 1992-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Onyx International Inc & Coalfield Consultants Inc → West Prg 1 Inc; 1992-02-14 to 1998-03-11; source msha-controller-operator-history
- **operator_operates_mine:** East Ward Llc → Mine #1; 1998-03-12 to 1999-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Sterling J  Gregory et al → Mine #1; 1998-03-12 to 1999-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Sterling J  Gregory et al → East Ward Llc; 1998-03-12 to 1999-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Dalco Coal Of Tennessee Llc → Mine #1; 1999-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Franklin → Mine #1; 1999-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Franklin → Dalco Coal Of Tennessee Llc; 1999-01-20 to current/open; source msha-controller-operator-history