# Relationship history for MSHA mine 2300190

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

- 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

- **operator_operates_mine:** Schiermeier Quarry Inc → Ranger Portable; 1950-01-01 to 2015-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Eric S  Strope et al → Ranger Portable; 1950-01-01 to 2011-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Mertens → Ranger Portable; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Schiermeier Esther & Duane → Ranger Portable; 1950-01-01 to 2002-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Schiermeier Esther & Duane → Schiermeier Quarry Inc; 1950-01-01 to 2002-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey D  Kolb → Ranger Portable; 2002-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey D  Kolb → Schiermeier Quarry Inc; 2002-01-14 to 2015-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Michael K Farmer  et al → Ranger Portable; 2011-04-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Schiermeier Quarry → Ranger Portable; 2015-12-22 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Donna  Myers → Ranger Portable; 2015-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donna  Myers → Schiermeier Quarry; 2015-12-22 to 2021-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Mertens Quarry → Ranger Portable; 2021-10-01 to 2025-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Mertens → Mertens Quarry; 2021-10-01 to 2025-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Capital Quarries Company, Inc. → Ranger Portable; 2025-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric S  Strope et al → Capital Quarries Company, Inc.; 2025-04-16 to 2011-04-18; source msha-controller-operator-history
- **controller_controls_operator:** Michael K Farmer  et al → Capital Quarries Company, Inc.; 2025-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elliott (Bud) E Farmer  et al → Capital Quarries Company, Inc.; 2025-04-16 to current/open; source msha-controller-operator-history