# Relationship history for MSHA mine 3600163

Current hierarchy: **Matthew G  Markunas → Meckley's Limestone Products Inc → Mandata 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:** Meckley'S Limestone Products Inc → Mandata Quarry; 1950-01-01 to 2001-01-29; source msha-controller-operator-history
- **controller_controls_mine:** Fred J  Meckley → Mandata Quarry; 1950-01-01 to 2001-01-29; source msha-controller-operator-history
- **controller_controls_operator:** Fred J  Meckley → Meckley'S Limestone Products Inc; 1950-01-01 to 2001-01-29; source msha-controller-operator-history
- **operator_operates_mine:** Meckley's Limestone Products Inc → Mandata Quarry; 2001-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony B  Markunas III et al → Mandata Quarry; 2001-01-30 to 2023-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Anthony B  Markunas III et al → Meckley's Limestone Products Inc; 2001-01-30 to 2023-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Matthew G  Markunas et al → Meckley's Limestone Products Inc; 2001-01-30 to 2023-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Matthew G  Markunas → Mandata Quarry; 2023-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew G  Markunas → Meckley's Limestone Products Inc; 2023-10-26 to current/open; source msha-controller-operator-history