# Relationship history for MSHA mine 0403299

Current hierarchy: **Rich  Holt → Greenstone Materials, Inc. → Greenstone Materials 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

- **operator_operates_mine:** Ortega Rock Company → Greenstone Materials Quarry; 1950-01-01 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Fred G Jones → Greenstone Materials Quarry; 1950-01-01 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Fred G Jones → Ortega Rock Company; 1950-01-01 to 1984-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Ortega Rock Quarry → Greenstone Materials Quarry; 1984-05-15 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul J Hubbs et al → Greenstone Materials Quarry; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul J Hubbs et al → Ortega Rock Quarry; 1984-05-15 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_operator:** John R Schmutz et al → Ortega Rock Quarry; 1984-05-15 to 2010-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Tabosa Stone, Inc. → Greenstone Materials Quarry; 2010-04-01 to 2012-02-29; source msha-controller-operator-history
- **controller_controls_mine:** James A  Canger et al → Greenstone Materials Quarry; 2010-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Canger et al → Tabosa Stone, Inc.; 2010-04-01 to 2012-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Rich  Holt → Greenstone Materials Quarry; 2010-10-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Greenstone Materials, Inc. → Greenstone Materials Quarry; 2012-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rich  Holt → Greenstone Materials, Inc.; 2012-03-01 to current/open; source msha-controller-operator-history