# Relationship history for MSHA mine 4608598

Current hierarchy: **Carl R  Farmer → Kramer Fork Mining, Inc. → No. 53 Mine**

- 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:** Robert L  Johnson → No. 53 Mine; 1995-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & S Coal Company Inc → No. 53 Mine; 1996-10-01 to 2001-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Johnson → R & S Coal Company Inc; 1996-10-01 to 2001-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Mark P  White → No. 53 Mine; 1999-04-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Niko Mining, Inc. → No. 53 Mine; 2001-10-11 to 2003-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Mark P  White → Niko Mining, Inc.; 2001-10-11 to 2003-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Carl R  Farmer → No. 53 Mine; 2002-05-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kramer Fork Mining, Inc. → No. 53 Mine; 2003-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl R  Farmer → Kramer Fork Mining, Inc.; 2003-05-12 to current/open; source msha-controller-operator-history