# Relationship history for MSHA mine 1700779

Current hierarchy: **Nate  Holyoke → Bald Mountain LLC → Whales Back 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

- **operator_operates_mine:** Sullivan Memorial Stone Works LLC → Whales Back Quarry; 2005-06-30 to 2021-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Michele C  Woodbury → Whales Back Quarry; 2005-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michele C  Woodbury → Sullivan Memorial Stone Works LLC; 2005-06-30 to 2021-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Bald Mountain LLC → Whales Back Quarry; 2021-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nate  Holyoke → Whales Back Quarry; 2021-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nate  Holyoke → Bald Mountain LLC; 2021-10-15 to current/open; source msha-controller-operator-history