# Relationship history for MSHA mine 2003160

Current hierarchy: **Sharon  McPhee; Ian  McPhee → McPhee Farms Inc. → Michigan Bluestone**

- 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:** Flint Stone & Supply Company → Michigan Bluestone; 2000-06-01 to 2001-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Darby  et al → Michigan Bluestone; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Darby  et al → Flint Stone & Supply Company; 2000-06-01 to 2001-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Hickey  et al → Flint Stone & Supply Company; 2000-06-01 to 2001-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Classic Grindstone → Michigan Bluestone; 2001-04-15 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Anderson  et al → Michigan Bluestone; 2001-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Anderson  et al → Classic Grindstone; 2001-04-15 to 2004-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Waterford Stone Supply Inc. → Michigan Bluestone; 2005-01-01 to 2007-10-24; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Birnbaum → Michigan Bluestone; 2005-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Birnbaum → Waterford Stone Supply Inc.; 2005-01-01 to 2007-10-24; source msha-controller-operator-history
- **operator_operates_mine:** McPhee Farms Inc. → Michigan Bluestone; 2007-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ian  McPhee et al → Michigan Bluestone; 2007-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ian  McPhee et al → McPhee Farms Inc.; 2007-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sharon  McPhee et al → McPhee Farms Inc.; 2007-10-25 to current/open; source msha-controller-operator-history