# Relationship history for MSHA mine 2200729

Current hierarchy: **Lonnie  Bounds; Kent  Grantham → Bounds & Grantham Building Services Inc → PIT ONE**

- 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:** Bounds & Grantham Building Services Inc → PIT ONE; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lonnie  Bounds  et al → PIT ONE; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lonnie  Bounds  et al → Bounds & Grantham Building Services Inc; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kent  Grantham  et al → Bounds & Grantham Building Services Inc; 2000-05-01 to current/open; source msha-controller-operator-history