# Relationship history for MSHA mine 2103125

Current hierarchy: **Steven R  Francisco → B. McNamara, Inc. → Mobile Crusher**

- 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:** Mc Namara Contracting Company Inc → Mobile Crusher; 1996-07-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Michael J  Mc Namara → Mobile Crusher; 1996-07-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Mc Namara → Mc Namara Contracting Company Inc; 1996-07-01 to 1997-03-31; source msha-controller-operator-history
- **operator_operates_mine:** B Mc Namara Inc → Mobile Crusher; 1997-04-01 to 2001-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Mc Namara → Mobile Crusher; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Mc Namara → B Mc Namara Inc; 1997-04-01 to 2001-10-09; source msha-controller-operator-history
- **operator_operates_mine:** B. McNamara, Inc. → Mobile Crusher; 2001-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven R  Francisco → Mobile Crusher; 2001-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Francisco → B. McNamara, Inc.; 2001-10-10 to current/open; source msha-controller-operator-history