# Relationship history for MSHA mine 1513122

Current hierarchy: **Kaneb Services Inc → Bituminous-Laurel Mining Inc → Mine #4**

- 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:** Glenncoe Miners → Mine #4; 1981-10-01 to 1983-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Thornberry Rennie - Earl Et Al → Mine #4; 1981-10-01 to 1983-09-29; source msha-controller-operator-history
- **controller_controls_operator:** Thornberry Rennie - Earl Et Al → Glenncoe Miners; 1981-10-01 to 1983-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → Mine #4; 1982-06-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous-Laurel Mining Inc → Mine #4; 1983-09-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Bituminous-Laurel Mining Inc; 1983-09-30 to current/open; source msha-controller-operator-history