# Relationship history for MSHA mine 0405097

Current hierarchy: **RRM Development Corporation; Mitsubishi Corp → Robertson's → Juniper Flats**

- 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:** Ronald W Pharris → Juniper Flats; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C L Pharris Sand & Gravel Inc → Juniper Flats; 1990-06-01 to 1992-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Ronald W Pharris → C L Pharris Sand & Gravel Inc; 1990-06-01 to 1992-01-17; source msha-controller-operator-history
- **operator_operates_mine:** C L Pharris Sand & Gravel Inc → Juniper Flats; 1992-01-18 to 2009-11-12; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Juniper Flats; 1992-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → C L Pharris Sand & Gravel Inc; 1992-01-18 to 2009-11-12; source msha-controller-operator-history
- **controller_controls_mine:** RRM Development Corporation et al → Juniper Flats; 1995-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Juniper Rock Corporation → Juniper Flats; 2009-11-13 to 2023-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Primoris Services Corporation → Juniper Flats; 2009-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Primoris Services Corporation → Juniper Rock Corporation; 2009-11-13 to 2023-01-06; source msha-controller-operator-history
- **operator_operates_mine:** Robertson's → Juniper Flats; 2023-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RRM Development Corporation et al → Robertson's; 2023-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitsubishi Corp  et al → Robertson's; 2023-01-07 to current/open; source msha-controller-operator-history