# Relationship history for MSHA mine 4607714

Current hierarchy: **Dennison James G → Double Eagle Coal Inc → Double Eagle 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:** John F  Stapleton → Double Eagle No 1; 1985-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gillette Coal Corp → Double Eagle No 1; 1989-06-01 to 1990-06-03; source msha-controller-operator-history
- **controller_controls_operator:** John F  Stapleton → Gillette Coal Corp; 1989-06-01 to 1990-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Double Eagle Coal Inc → Double Eagle No 1; 1990-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennison James G → Double Eagle No 1; 1990-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennison James G → Double Eagle Coal Inc; 1990-06-04 to current/open; source msha-controller-operator-history