# Relationship history for MSHA mine 2302096

Current hierarchy: **Michael K Farmer; Elliott (Bud) E Farmer → Capital Quarries Co Inc → Casper Portable Plant**

- 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:** Eric S  Strope et al → Casper Portable Plant; 1950-01-01 to 2011-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Fred Weber, Inc. → Casper Portable Plant; 1986-12-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fred Weber Inc → Casper Portable Plant; 1993-11-01 to 2001-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Fred Weber, Inc. → Fred Weber Inc; 1993-11-01 to 2001-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Casper'S High Hill Quarry → Casper Portable Plant; 2001-04-01 to 2003-03-23; source msha-controller-operator-history
- **controller_controls_mine:** James F  Casper → Casper Portable Plant; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James F  Casper → Casper'S High Hill Quarry; 2001-04-01 to 2003-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Capital Quarries Co Inc → Casper Portable Plant; 2003-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric S  Strope et al → Capital Quarries Co Inc; 2003-03-24 to 2011-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Elliott (Bud) E Farmer  et al → Casper Portable Plant; 2011-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Quarries Co Inc; 2011-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Quarries Co Inc; 2011-04-19 to current/open; source msha-controller-operator-history