# Relationship history for MSHA mine 3609660

Current hierarchy: **Louis A  Palada → Mendoza Stone → Holgates 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Holgate Bros → Holgates Quarry; 2008-08-13 to 2015-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Holgate  et al → Holgates Quarry; 2008-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Holgate  et al → Holgate Bros; 2008-08-13 to 2015-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Holgate  et al → Holgate Bros; 2008-08-13 to 2015-09-22; source msha-controller-operator-history
- **controller_controls_mine:** John R  Martin → Holgates Quarry; 2010-03-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** John Martin → Holgates Quarry; 2015-09-23 to 2016-08-15; source msha-controller-operator-history
- **controller_controls_operator:** John R  Martin → John Martin; 2015-09-23 to 2016-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Mendoza Stone → Holgates Quarry; 2016-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Louis A  Palada → Holgates Quarry; 2016-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis A  Palada → Mendoza Stone; 2016-08-16 to current/open; source msha-controller-operator-history