# Relationship history for MSHA mine 3607493

Current hierarchy: **Robert  Ainbinder; Robert  Barra → Bernice Mining & Contracting Inc → Common Sense #2**

- 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:** Lancaster Resources Ltd → Common Sense #2; 1983-09-01 to 1990-06-30; source msha-controller-operator-history
- **controller_controls_mine:** First Century Corp → Common Sense #2; 1983-09-01 to 1990-06-30; source msha-controller-operator-history
- **controller_controls_operator:** First Century Corp → Lancaster Resources Ltd; 1983-09-01 to 1990-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Suscon Sales Corp → Common Sense #2; 1990-07-01 to 1994-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Michael G  Faleski → Common Sense #2; 1990-07-01 to 1994-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael G  Faleski → Suscon Sales Corp; 1990-07-01 to 1994-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Bernice Mining & Contracting Inc → Common Sense #2; 1994-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Ainbinder et al → Common Sense #2; 1994-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Ainbinder et al → Bernice Mining & Contracting Inc; 1994-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Barra et al → Bernice Mining & Contracting Inc; 1994-10-27 to current/open; source msha-controller-operator-history