# Relationship history for MSHA mine 1511380

Current hierarchy: **Prater Marvin → E & D Coal Company Inc → No 13 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:** Slone Bennie F → No 13 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Spring Branch Coal Company Inc → No 13 Mine; 1978-06-01 to 1979-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Slone Bennie F → Spring Branch Coal Company Inc; 1978-06-01 to 1979-04-30; source msha-controller-operator-history
- **operator_operates_mine:** E & D Coal Company → No 13 Mine; 1979-05-01 to 1979-10-21; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Earl Et Al → No 13 Mine; 1979-05-01 to 1979-10-21; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Earl Et Al → E & D Coal Company; 1979-05-01 to 1979-10-21; source msha-controller-operator-history
- **operator_operates_mine:** E & D Coal Company Inc → No 13 Mine; 1979-10-22 to 1980-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Smith Roger D → No 13 Mine; 1979-10-22 to 1980-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Smith Roger D → E & D Coal Company Inc; 1979-10-22 to 1980-06-09; source msha-controller-operator-history
- **operator_operates_mine:** E & D Coal Company Inc → No 13 Mine; 1980-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Prater Marvin → No 13 Mine; 1980-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Prater Marvin → E & D Coal Company Inc; 1980-06-10 to current/open; source msha-controller-operator-history