# Relationship history for MSHA mine 4103478

Current hierarchy: **Setliff Jerry → Corpus Christi Sand & Gravel Inc → Corpus Christi Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Corpus Christi Materials Inc → Corpus Christi Sand & Gravel; 1987-07-01 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Temple James → Corpus Christi Sand & Gravel; 1987-07-01 to 1988-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Temple James → Corpus Christi Materials Inc; 1987-07-01 to 1988-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Corpus Christi Sand & Gravel Inc → Corpus Christi Sand & Gravel; 1988-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Setliff Jerry → Corpus Christi Sand & Gravel; 1988-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Setliff Jerry → Corpus Christi Sand & Gravel Inc; 1988-07-13 to current/open; source msha-controller-operator-history