# Relationship history for MSHA mine 1201680

Current hierarchy: **Darian S  Houssain → Pro Lawn Care and Landscaping LLC → Stonehenge Gravel**

- 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:** Cain'S Lakes Gravel Company → Stonehenge Gravel; 1978-03-09 to 1985-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Cain Ernie E → Stonehenge Gravel; 1978-03-09 to 1985-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Cain Ernie E → Cain'S Lakes Gravel Company; 1978-03-09 to 1985-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Stonehenge Concrete Company Inc → Stonehenge Gravel; 1985-06-13 to 2017-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Matthew E  Jetmore et al → Stonehenge Gravel; 1985-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew E  Jetmore et al → Stonehenge Concrete Company Inc; 1985-06-13 to 2017-04-10; source msha-controller-operator-history
- **operator_operates_mine:** Pro Lawn Care and Landscaping LLC → Stonehenge Gravel; 2017-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darian S  Houssain → Stonehenge Gravel; 2017-04-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darian S  Houssain → Pro Lawn Care and Landscaping LLC; 2017-04-11 to current/open; source msha-controller-operator-history