# Relationship history for MSHA mine 4406056

Current hierarchy: **Hank K  Matney; Fred D  Matney; Rick A  Matney → Nufac Mining Inc → Mine 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

- **operator_operates_mine:** Back Valley Coal Company Inc → Mine No 1; 1984-02-01 to 1985-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Harris Frank → Mine No 1; 1984-02-01 to 1985-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Harris Frank → Back Valley Coal Company Inc; 1984-02-01 to 1985-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Cove Creek Energy Company Inc → Mine No 1; 1985-07-12 to 1986-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Davis Charles Edwin & Cecil S Mallory → Mine No 1; 1985-07-12 to 1986-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Davis Charles Edwin & Cecil S Mallory → Cove Creek Energy Company Inc; 1985-07-12 to 1986-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Wilco Mining Inc → Mine No 1; 1986-05-08 to 1991-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Glen W  Hubbard → Mine No 1; 1986-05-08 to 1991-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Glen W  Hubbard → Wilco Mining Inc; 1986-05-08 to 1991-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Nufac Mining Inc → Mine No 1; 1991-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick A  Matney  et al → Mine No 1; 1991-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick A  Matney  et al → Nufac Mining Inc; 1991-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hank K  Matney  et al → Nufac Mining Inc; 1991-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred D  Matney  et al → Nufac Mining Inc; 1991-08-08 to current/open; source msha-controller-operator-history