# Relationship history for MSHA mine 1100182

Current hierarchy: **Timothy M  Corry; Gregory Scott  Perris → GP Material, Inc. → Alby 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:** Reliance Quarry Limited Partnership → Alby Quarry; 1950-01-01 to 1990-07-15; source msha-controller-operator-history
- **controller_controls_mine:** John G  Helmkamp et al → Alby Quarry; 1950-01-01 to 1990-07-15; source msha-controller-operator-history
- **controller_controls_operator:** John G  Helmkamp et al → Reliance Quarry Limited Partnership; 1950-01-01 to 1990-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Alby Quarry → Alby Quarry; 1990-07-16 to 2010-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Eugene  Lippold → Alby Quarry; 1990-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eugene  Lippold → Alby Quarry; 1990-07-16 to 2010-10-30; source msha-controller-operator-history
- **operator_operates_mine:** GP Material, Inc. → Alby Quarry; 2010-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory Scott  Perris et al → Alby Quarry; 2010-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory Scott  Perris et al → GP Material, Inc.; 2010-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy M  Corry et al → GP Material, Inc.; 2010-10-31 to current/open; source msha-controller-operator-history