# Relationship history for MSHA mine 2302016

Current hierarchy: **William K  Higgins → Higgins Quarry LLC → Higgins Quarry, LLC**

- 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:** Muenks Brothers Quarries Inc → Higgins Quarry, LLC; 1990-02-01 to 2008-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Gregory J Muenks et al → Higgins Quarry, LLC; 1990-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory J Muenks et al → Muenks Brothers Quarries Inc; 1990-02-01 to 2008-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Higgins Quarry LLC → Higgins Quarry, LLC; 2008-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William K  Higgins → Higgins Quarry, LLC; 2008-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William K  Higgins → Higgins Quarry LLC; 2008-08-25 to current/open; source msha-controller-operator-history