# Relationship history for MSHA mine 4403457

Current hierarchy: **Compton Ronnie--Scott Mackney & Roy Hurt → Ruth Ann Coal Company → No 2 Mine**

- 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:** Wright Larry → No 2 Mine; 1950-01-01 to 1977-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Compton Ronnie--Scott Mackney & Roy Hurt → No 2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & J Coal Co → No 2 Mine; 1973-01-01 to 1974-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Bernard Et Al → No 2 Mine; 1973-01-01 to 1974-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Bernard Et Al → D & J Coal Co; 1973-01-01 to 1974-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Shady Branch Coal Company Inc → No 2 Mine; 1974-01-01 to 1975-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Brown & Lewis Coal Co → No 2 Mine; 1974-04-02 to 1974-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Brown & Lewis Coal Company → No 2 Mine; 1974-04-02 to 1974-07-01; source msha-controller-operator-history
- **controller_controls_operator:** Brown & Lewis Coal Company → Brown & Lewis Coal Co; 1974-04-02 to 1974-07-01; source msha-controller-operator-history
- **operator_operates_mine:** Wright Coal Co → No 2 Mine; 1974-07-02 to 1974-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Wright Larry → Wright Coal Co; 1974-07-02 to 1974-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Perry Allen  Whited → No 2 Mine; 1974-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shady Branch Coal Company Inc → No 2 Mine; 1974-10-02 to 1975-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Shady Branch Coal Company Inc → Shady Branch Coal Company Inc; 1974-10-02 to 1975-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Davis & Whited Coal Company Inc → No 2 Mine; 1975-07-14 to 1976-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Perry Allen  Whited → Davis & Whited Coal Company Inc; 1975-07-14 to 1976-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Ruth Ann Coal Company → No 2 Mine; 1976-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Compton Ronnie--Scott Mackney & Roy Hurt → Ruth Ann Coal Company; 1976-08-10 to current/open; source msha-controller-operator-history