# Relationship history for MSHA mine 3609529

Current hierarchy: **Force Aggregates LLC → Kinkead Aggregates, LLC → Buena Vista**

- 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

- **controller_controls_mine:** Edward C  Griffith → Buena Vista; 1990-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Edward C Griffith Quarrying Inc → Buena Vista; 2007-06-03 to 2011-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Edward C  Griffith → Edward C Griffith Quarrying Inc; 2007-06-03 to 2011-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Christopher J  Evans et al → Buena Vista; 2010-06-10 to 2015-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Kinkead Aggregates, LLC → Buena Vista; 2011-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher J  Evans et al → Kinkead Aggregates, LLC; 2011-05-12 to 2015-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Bryan  Force et al → Kinkead Aggregates, LLC; 2011-05-12 to 2015-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Force Aggregates LLC → Buena Vista; 2015-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Force Aggregates LLC → Kinkead Aggregates, LLC; 2015-09-01 to current/open; source msha-controller-operator-history