# Relationship history for MSHA mine 2902219

Current hierarchy: **Lafarge S A → Lafarge Southwest Incorporated → GREGORY PIT**

- 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 → GREGORY PIT; 1998-02-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Mobile New Mexico Inc → GREGORY PIT; 2001-04-01 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Western Mobile New Mexico Inc; 2001-04-01 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → GREGORY PIT; 2002-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lafarge Southwest Incorporated → GREGORY PIT; 2002-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Lafarge Southwest Incorporated; 2002-03-01 to current/open; source msha-controller-operator-history