# Relationship history for MSHA mine 4003315

Current hierarchy: **Michael  Hollingshead → SRM Materials, LLC → Woodbury 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:** Wells Group Inc. → Woodbury Quarry; 2008-02-04 to 2012-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Michael Jason  Wells → Woodbury Quarry; 2008-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael Jason  Wells → Wells Group Inc.; 2008-02-04 to 2012-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Community Stone → Woodbury Quarry; 2012-10-19 to 2013-12-25; source msha-controller-operator-history
- **controller_controls_mine:** Michael Jason  Wells → Woodbury Quarry; 2012-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael Jason  Wells → Community Stone; 2012-10-19 to 2013-12-25; source msha-controller-operator-history
- **operator_operates_mine:** SRM Materials, LLC → Woodbury Quarry; 2013-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Hollingshead et al → Woodbury Quarry; 2013-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Hollingshead et al → SRM Materials, LLC; 2013-12-26 to current/open; source msha-controller-operator-history