# Relationship history for MSHA mine 1601439

Current hierarchy: **Lanny G  Crowe → Industrial Aggregates → Springhill Operation**

- 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

- **controller_controls_mine:** Lafarge S A → Springhill Operation; 2001-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gordon  Crowe et al → Springhill Operation; 2004-07-20 to 2012-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Texas Industries Inc → Springhill Operation; 2004-12-01 to 2014-07-01; source msha-controller-operator-history
- **operator_operates_mine:** TXI Operations LP → Springhill Operation; 2006-10-10 to 2008-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Texas Industries Inc → TXI Operations LP; 2006-10-10 to 2008-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Aggregates Southeast Inc → Springhill Operation; 2008-06-01 to 2012-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Aggregates Southeast Inc; 2008-06-01 to 2012-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Industrial Aggregates → Springhill Operation; 2012-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Crowe et al → Industrial Aggregates; 2012-02-01 to 2012-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Lanny G  Crowe → Springhill Operation; 2012-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lanny G  Crowe → Industrial Aggregates; 2012-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Springhill Operation; 2014-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → TXI Operations LP; 2014-07-02 to 2008-05-31; source msha-controller-operator-history