# Relationship history for MSHA mine 4404186

Current hierarchy: **Ratliffe N C → Fletcher & Ratliff Coal Company Inc → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Big C Coal Co Inc → No 2 Mine; 1975-01-01 to 1976-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Carter Philip → No 2 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carter Philip → Big C Coal Co Inc; 1975-01-01 to 1976-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Hagerman Elbert & Douglas Looney → No 2 Mine; 1975-09-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Progressive Coal Company → No 2 Mine; 1976-02-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Hagerman Elbert & Douglas Looney → Progressive Coal Company; 1976-02-01 to 1977-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Fletcher & Ratliff Coal Company Inc → No 2 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ratliffe N C → No 2 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliffe N C → Fletcher & Ratliff Coal Company Inc; 1977-10-01 to current/open; source msha-controller-operator-history