# Relationship history for MSHA mine 3607795

Current hierarchy: **Lisa  Stephen → Wayne Gravel Products → Wayne Gravel Products**

- 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:** Wayne Gravel Products, Inc. → Wayne Gravel Products; 1986-04-01 to 2007-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Wayne A  Stephen → Wayne Gravel Products; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne A  Stephen → Wayne Gravel Products, Inc.; 1986-04-01 to 2007-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Allegany Aggregates LLC → Wayne Gravel Products; 2007-04-01 to 2011-04-11; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Fairbrother  et al → Wayne Gravel Products; 2007-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Fairbrother  et al → Allegany Aggregates LLC; 2007-04-01 to 2011-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Keith J  Scheetz  et al → Allegany Aggregates LLC; 2007-04-01 to 2011-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Wayne Gravel Products → Wayne Gravel Products; 2011-04-12 to 2026-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Wayne A  Stephen → Wayne Gravel Products; 2011-04-12 to 2026-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Wayne Gravel Products → Wayne Gravel Products; 2026-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lisa  Stephen → Wayne Gravel Products; 2026-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lisa  Stephen → Wayne Gravel Products; 2026-08-18 to current/open; source msha-controller-operator-history