# Relationship history for MSHA mine 1514400

Current hierarchy: **Johnson Emerson-David Lane El Al → E J Enterprise → No 1**

- 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:** Carter James Et Al → No 1; 1982-08-01 to 1984-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Carter Coal Company → No 1; 1983-12-01 to 1984-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Carter James Et Al → Carter Coal Company; 1983-12-01 to 1984-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Sub-Geo Coal Company → No 1; 1984-05-16 to 1984-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Reeder William Et Al → No 1; 1984-05-16 to 1984-07-24; source msha-controller-operator-history
- **controller_controls_operator:** Reeder William Et Al → Sub-Geo Coal Company; 1984-05-16 to 1984-07-24; source msha-controller-operator-history
- **operator_operates_mine:** Sub-Geo Corp → No 1; 1984-07-25 to 1986-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Sempson James & Samuel Jones → No 1; 1984-07-25 to 1986-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Sempson James & Samuel Jones → Sub-Geo Corp; 1984-07-25 to 1986-07-06; source msha-controller-operator-history
- **operator_operates_mine:** E J Enterprise → No 1; 1986-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Emerson-David Lane El Al → No 1; 1986-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Emerson-David Lane El Al → E J Enterprise; 1986-07-07 to current/open; source msha-controller-operator-history