# Relationship history for MSHA mine 3000641

Current hierarchy: **Glenn  Pacchiana → Briarcliff Associates Inc → Salt Hill 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:** De Luca Emery Mine Inc → Salt Hill Quarry; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Martin Catherine → Salt Hill Quarry; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Martin Catherine → De Luca Emery Mine Inc; 1950-01-01 to 1986-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Briarcliff Associates Inc → Salt Hill Quarry; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glenn  Pacchiana et al → Salt Hill Quarry; 1986-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn  Pacchiana et al → Briarcliff Associates Inc; 1986-06-30 to current/open; source msha-controller-operator-history