# Relationship history for MSHA mine 4503569

Current hierarchy: **LaVina L  Dennis; Dale A  Dennis → Sleepy Hollow Quarry Inc. → Sleep Hollow 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:** Dennis Contracting → Sleep Hollow Quarry; 2004-08-27 to 2013-11-13; source msha-controller-operator-history
- **controller_controls_mine:** Dale A  Dennis → Sleep Hollow Quarry; 2004-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Dennis → Dennis Contracting; 2004-08-27 to 2013-11-13; source msha-controller-operator-history
- **operator_operates_mine:** Sleepy Hollow Quarry Inc. → Sleep Hollow Quarry; 2013-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** LaVina L  Dennis et al → Sleep Hollow Quarry; 2013-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LaVina L  Dennis et al → Sleepy Hollow Quarry Inc.; 2013-11-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Dennis et al → Sleepy Hollow Quarry Inc.; 2013-11-14 to current/open; source msha-controller-operator-history