# Relationship history for MSHA mine 4404488

Current hierarchy: **Barnes James → H & B Coal Company Inc → No 1 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:** Mitchell Coal Company Inc → No 1 Mine; 1976-03-01 to 1976-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell Harold L → No 1 Mine; 1976-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Harold L → Mitchell Coal Company Inc; 1976-03-01 to 1976-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Manuel Jerry V & Eldon M Sizemore → No 1 Mine; 1976-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & M Coal Company → No 1 Mine; 1976-09-15 to 1976-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Manuel Jerry V & Eldon M Sizemore → S & M Coal Company; 1976-09-15 to 1976-10-09; source msha-controller-operator-history
- **operator_operates_mine:** B & H Coal Company Inc → No 1 Mine; 1976-10-10 to 1976-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Browning Patricia → No 1 Mine; 1976-10-10 to 1978-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Browning Patricia → B & H Coal Company Inc; 1976-10-10 to 1976-11-09; source msha-controller-operator-history
- **operator_operates_mine:** H & B Coal Company Inc → No 1 Mine; 1976-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barnes James → No 1 Mine; 1976-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barnes James → H & B Coal Company Inc; 1976-11-10 to current/open; source msha-controller-operator-history