# Relationship history for MSHA mine 3607649

Current hierarchy: **Lanager Thomas R → Chestnut Ridge Coal Corp → Clarksville Dump**

- 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

- **controller_controls_mine:** Lanager Thomas R → Clarksville Dump; 1979-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lee Jay Corp → Clarksville Dump; 1985-02-01 to 1986-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Forse Herbert E Jr → Clarksville Dump; 1985-02-01 to 1986-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Forse Herbert E Jr → Lee Jay Corp; 1985-02-01 to 1986-05-28; source msha-controller-operator-history
- **operator_operates_mine:** Ectasoer Corp → Clarksville Dump; 1986-05-29 to 1987-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Joyce James V → Clarksville Dump; 1986-05-29 to 1987-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Joyce James V → Ectasoer Corp; 1986-05-29 to 1987-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Chestnut Ridge Coal Corp → Clarksville Dump; 1987-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lanager Thomas R → Chestnut Ridge Coal Corp; 1987-02-20 to current/open; source msha-controller-operator-history