# Relationship history for MSHA mine 1510876

Current hierarchy: **Carter Larry → J L P Coal Company → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Osborne John A → No 1 Mine; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crown Coal Company → No 1 Mine; 1977-11-01 to 1978-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Osborne John A → Crown Coal Company; 1977-11-01 to 1978-06-04; source msha-controller-operator-history
- **operator_operates_mine:** J L P Coal Company → No 1 Mine; 1978-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carter Larry Et Al → No 1 Mine; 1978-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carter Larry Et Al → J L P Coal Company; 1978-06-05 to current/open; source msha-controller-operator-history