# Relationship history for MSHA mine 0301818

Current hierarchy: **Michael K Farmer; Elliott (Bud) E Farmer → Capital Quarries Company, Inc. → Pocahontas 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

- **controller_controls_mine:** Eric S  Strope et al → Pocahontas Quarry; 1950-01-01 to 2011-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Jet Materials → Pocahontas Quarry; 1999-05-01 to 2010-12-26; source msha-controller-operator-history
- **controller_controls_mine:** James  Thompson et al → Pocahontas Quarry; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Thompson et al → Jet Materials; 1999-05-01 to 2010-12-26; source msha-controller-operator-history
- **operator_operates_mine:** Capital Quarries Company, Inc. → Pocahontas Quarry; 2010-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric S  Strope et al → Capital Quarries Company, Inc.; 2010-12-27 to 2011-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Elliott (Bud) E Farmer  et al → Pocahontas Quarry; 2011-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Quarries Company, Inc.; 2011-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Quarries Company, Inc.; 2011-04-19 to current/open; source msha-controller-operator-history