# Relationship history for MSHA mine 1700688

Current hierarchy: **S C Holdings Inc → Sargent Corporation → BOWDOIN QUARRY**

- 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:** S C Holdings Inc → BOWDOIN QUARRY; 1997-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bowdoin Aggregate Sales Inc. → BOWDOIN QUARRY; 2000-12-01 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Peter  Labbe → BOWDOIN QUARRY; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter  Labbe → Bowdoin Aggregate Sales Inc.; 2000-12-01 to 2025-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Sargent Corporation → BOWDOIN QUARRY; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** S C Holdings Inc → Sargent Corporation; 2025-01-14 to current/open; source msha-controller-operator-history