# Relationship history for MSHA mine 3609539

Current hierarchy: **David L  Karp → B C Quarries LLC → Shirvan 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:** Ely's Stone → Shirvan Quarry; 2007-07-10 to 2010-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Michael M  Ely Sr → Shirvan Quarry; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael M  Ely Sr → Ely's Stone; 2007-07-10 to 2010-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Jackson Stone → Shirvan Quarry; 2010-03-31 to 2020-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Timothy J  Jackson → Shirvan Quarry; 2010-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy J  Jackson → Jackson Stone; 2010-03-31 to 2020-04-01; source msha-controller-operator-history
- **operator_operates_mine:** B C Quarries LLC → Shirvan Quarry; 2020-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David L  Karp → Shirvan Quarry; 2020-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David L  Karp → B C Quarries LLC; 2020-04-02 to current/open; source msha-controller-operator-history