# Relationship history for MSHA mine 3800525

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Materials, Inc. → Georgetown II 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:** Martin Marietta Materials Inc → Georgetown II Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ware Brothers Inc → Georgetown II Quarry; 1950-01-01 to 1982-10-26; source msha-controller-operator-history
- **controller_controls_mine:** J Bryan  Ware → Georgetown II Quarry; 1950-01-01 to 1982-10-26; source msha-controller-operator-history
- **controller_controls_operator:** J Bryan  Ware → Ware Brothers Inc; 1950-01-01 to 1982-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Southern Aggregates Company → Georgetown II Quarry; 1982-10-27 to 1994-03-31; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Georgetown II Quarry; 1982-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Southern Aggregates Company; 1982-10-27 to 1994-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Aggregates → Georgetown II Quarry; 1994-04-01 to 2005-05-24; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates; 1994-04-01 to 2005-05-24; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → Georgetown II Quarry; 2005-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2005-05-25 to current/open; source msha-controller-operator-history