# Relationship history for MSHA mine 2301944

Current hierarchy: **Michael K Farmer; Elliott (Bud) E Farmer → Capital Sand Company Inc → JEROME PLANT #11**

- 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:** Howard Olen → JEROME PLANT #11; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael K Farmer  et al → JEROME PLANT #11; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Howard Ready Mixed Concrete Company → JEROME PLANT #11; 1985-10-01 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Howard Olen → Howard Ready Mixed Concrete Company; 1985-10-01 to 1990-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → JEROME PLANT #11; 1987-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Construction Materials → JEROME PLANT #11; 1990-10-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Construction Materials; 1990-10-01 to 1997-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Capital Sand Company Inc → JEROME PLANT #11; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Sand Company Inc; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Sand Company Inc; 1997-04-01 to current/open; source msha-controller-operator-history