# Relationship history for MSHA mine 4104626

Current hierarchy: **Stallion Oilfield Services Ltd → Stallion Oilfield Construction LLC → Johnson County 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Stallion Oilfield Services Ltd → Johnson County Quarry; 2006-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Valley Aggregates, Inc. → Johnson County Quarry; 2006-11-01 to 2007-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Larry V  Witt et al → Johnson County Quarry; 2006-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry V  Witt et al → Green Valley Aggregates, Inc.; 2006-11-01 to 2007-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Stallion Oilfield Construction LLC → Johnson County Quarry; 2007-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stallion Oilfield Services Ltd → Stallion Oilfield Construction LLC; 2007-02-22 to current/open; source msha-controller-operator-history