# Relationship history for MSHA mine 1500084

Current hierarchy: **Richard  Holloway; Jonathan  Holloway → Quality Stone & Ready Mix Inc → Quality Stone & Ready Mix Inc.**

- 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:** Quality Stone & Ready Mix Inc → Quality Stone & Ready Mix Inc.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Holloway et al → Quality Stone & Ready Mix Inc.; 1950-01-01 to 2020-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Holloway et al → Quality Stone & Ready Mix Inc; 1950-01-01 to 2020-01-20; source msha-controller-operator-history
- **controller_controls_operator:** D Kevin  Holloway et al → Quality Stone & Ready Mix Inc; 1950-01-01 to 2020-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Holloway et al → Quality Stone & Ready Mix Inc.; 2020-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Holloway et al → Quality Stone & Ready Mix Inc; 2020-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jonathan  Holloway et al → Quality Stone & Ready Mix Inc; 2020-01-21 to current/open; source msha-controller-operator-history