# Relationship history for MSHA mine 1700821

Current hierarchy: **Richard J  Bois → Millennium Granite LLC → Millennium Granite**

- 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:** Millenium Granite Quarry & Stoneworks → Millennium Granite; 2007-07-17 to 2017-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Richard J  Bois → Millennium Granite; 2007-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard J  Bois → Millenium Granite Quarry & Stoneworks; 2007-07-17 to 2017-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Millennium Granite LLC → Millennium Granite; 2017-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard J  Bois → Millennium Granite; 2017-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard J  Bois → Millennium Granite LLC; 2017-04-01 to current/open; source msha-controller-operator-history