# Relationship history for MSHA mine 1519016

Current hierarchy: **Quentin O  Meade → Quinco Mining, Inc. → No. #4**

- 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:** Quentin O  Meade → No. #4; 2005-09-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boothill Development Co LLC → No. #4; 2006-07-10 to 2006-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Barth  et al → No. #4; 2006-07-10 to 2007-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Barth  et al → Boothill Development Co LLC; 2006-07-10 to 2006-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Billy E  Seals  et al → Boothill Development Co LLC; 2006-07-10 to 2006-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Quinco Mining, Inc. → No. #4; 2006-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Quentin O  Meade → Quinco Mining, Inc.; 2006-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan  Blumling  et al → No. #4; 2007-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Blumling  et al → Boothill Development Co LLC; 2007-02-05 to 2006-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Ernie  Eisenhower  et al → Boothill Development Co LLC; 2007-02-05 to 2006-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Bentley  et al → Boothill Development Co LLC; 2007-02-05 to 2006-10-09; source msha-controller-operator-history