# Relationship history for MSHA mine 3003187

Current hierarchy: **JAMES  BARTELL → Bartell Sand & Gravel → PIT #1**

- 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:** Meagher Construction Company → PIT #1; 1997-05-01 to 2002-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Richard N  Meagher → PIT #1; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard N  Meagher → Meagher Construction Company; 1997-05-01 to 2002-06-18; source msha-controller-operator-history
- **operator_operates_mine:** FLORENCE SAND & GRAVEL → PIT #1; 2002-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** JAMES  BARTELL → PIT #1; 2002-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** JAMES  BARTELL → FLORENCE SAND & GRAVEL; 2002-06-19 to current/open; source msha-controller-operator-history