# Relationship history for MSHA mine 2302522

Current hierarchy: **Russ A.  Mothershead → Grays Point Stone & Materials LLC → Grays Point 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

- **controller_controls_mine:** Jay E  Luhr et al → Grays Point Quarry; 1996-07-01 to 2015-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Jay E Luhr → Grays Point Quarry; 2015-05-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Luhr Bros., Inc. → Grays Point Quarry; 2018-01-26 to 2023-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Jay E Luhr → Luhr Bros., Inc.; 2018-01-26 to 2023-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Jay E  Luhr et al → Luhr Bros., Inc.; 2018-01-26 to 2015-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Luhr et al → Luhr Bros., Inc.; 2018-01-26 to 2015-05-23; source msha-controller-operator-history
- **operator_operates_mine:** Grays Point Stone & Materials LLC → Grays Point Quarry; 2023-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russ A.  Mothershead → Grays Point Quarry; 2023-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russ A.  Mothershead → Grays Point Stone & Materials LLC; 2023-07-10 to current/open; source msha-controller-operator-history