# Relationship history for MSHA mine 1000701

Current hierarchy: **Theo R  Orchard → Idaho Travertine Corp → Fall Creek Travertine 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:** Earl Wilcox Contractor → Fall Creek Travertine Quarry; 1950-01-01 to 1980-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Wilcox Earl → Fall Creek Travertine Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilcox Earl → Earl Wilcox Contractor; 1950-01-01 to 1980-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Marble Shop Inc → Fall Creek Travertine Quarry; 1980-08-01 to 1989-05-04; source msha-controller-operator-history
- **controller_controls_mine:** C N  Ledgerwood → Fall Creek Travertine Quarry; 1980-08-01 to 1989-05-04; source msha-controller-operator-history
- **controller_controls_operator:** C N  Ledgerwood → Marble Shop Inc; 1980-08-01 to 1989-05-04; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Travertine Corp → Fall Creek Travertine Quarry; 1989-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theo R  Orchard → Fall Creek Travertine Quarry; 1989-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Theo R  Orchard → Idaho Travertine Corp; 1989-05-05 to current/open; source msha-controller-operator-history