# Relationship history for MSHA mine 3607648

Current hierarchy: **Knorr Joseph W → J W Knorr Coal Sales → Fox Hill Coal Pockets**

- 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:** Dimeling William R → Fox Hill Coal Pockets; 1977-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Great Eastern Coal Corp → Fox Hill Coal Pockets; 1985-01-01 to 1986-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Dimeling William R → Great Eastern Coal Corp; 1985-01-01 to 1986-07-13; source msha-controller-operator-history
- **operator_operates_mine:** J W Knorr Coal Sales → Fox Hill Coal Pockets; 1986-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Knorr Joseph W → Fox Hill Coal Pockets; 1986-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knorr Joseph W → J W Knorr Coal Sales; 1986-07-14 to current/open; source msha-controller-operator-history