# Relationship history for MSHA mine 0600084

Current hierarchy: **Robert  Belden → Redland Brick Inc. → K F Quarry**

- 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

- **operator_operates_mine:** K-F Brick Company Inc → K F Quarry; 1950-01-01 to 1990-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Richard D  Wheeler → K F Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard D  Wheeler → K-F Brick Company Inc; 1950-01-01 to 1990-12-31; source msha-controller-operator-history
- **operator_operates_mine:** K-F Brick Cocmpany Inc → K F Quarry; 1991-01-01 to 1992-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Steetley PLC → K F Quarry; 1991-01-01 to 1992-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Steetley PLC → K-F Brick Cocmpany Inc; 1991-01-01 to 1992-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Redland Brick Inc → K F Quarry; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Redland Plc → K F Quarry; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Redland Plc → Redland Brick Inc; 1992-03-01 to 1996-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Redland Brick Inc. → K F Quarry; 1996-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William H  Belden → K F Quarry; 1996-10-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William H  Belden → Redland Brick Inc.; 1996-10-01 to 2015-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Belden → K F Quarry; 2016-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Belden → Redland Brick Inc.; 2016-01-01 to current/open; source msha-controller-operator-history