# Relationship history for MSHA mine 0202943

Current hierarchy: **Mary  Barnett → Bmc Development → BELLEMONT 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

- **operator_operates_mine:** Bmc Development → BELLEMONT PIT; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mary  Barnett et al → BELLEMONT PIT; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary  Barnett et al → Bmc Development; 2001-07-01 to current/open; source msha-controller-operator-history