# Relationship history for MSHA mine 1513127

Current hierarchy: **Lanham Roy → B & R Coal Company → 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

- **operator_operates_mine:** E & R Management Inc → No 1; 1981-09-01 to 1982-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Lang Theo O → No 1; 1981-09-01 to 1982-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Lang Theo O → E & R Management Inc; 1981-09-01 to 1982-03-31; source msha-controller-operator-history
- **operator_operates_mine:** E & R Management Inc → No 1; 1982-04-01 to 1985-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Elliott Gary & Larry → No 1; 1982-04-01 to 1985-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Elliott Gary & Larry → E & R Management Inc; 1982-04-01 to 1985-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Mc Kiddy Reed → No 1; 1984-07-01 to 1985-12-22; source msha-controller-operator-history
- **operator_operates_mine:** R & R Coal Company → No 1; 1985-07-11 to 1985-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Mc Kiddy Reed → R & R Coal Company; 1985-07-11 to 1985-12-22; source msha-controller-operator-history
- **operator_operates_mine:** B & R Coal Company → No 1; 1985-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lanham Roy Et Al → No 1; 1985-12-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lanham Roy Et Al → B & R Coal Company; 1985-12-23 to current/open; source msha-controller-operator-history