# Relationship history for MSHA mine 3003852

Current hierarchy: **Berness  Bolton; Christopher  Johnson → GILMA ENTERPRISES INC. → CHESTER 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:** Berness Bolton Excavating Inc. → CHESTER PIT; 2012-06-12 to 2022-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Berness  Bolton → CHESTER PIT; 2012-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berness  Bolton → Berness Bolton Excavating Inc.; 2012-06-12 to 2022-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Gilma Enterprises Inc. → CHESTER PIT; 2022-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher  Johnson et al → CHESTER PIT; 2022-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Johnson et al → Gilma Enterprises Inc.; 2022-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berness  Bolton et al → Gilma Enterprises Inc.; 2022-07-13 to current/open; source msha-controller-operator-history