# Relationship history for MSHA mine 4405633

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Materials, Inc. → CARMEL CHURCH 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Martin Marietta Materials Inc → CARMEL CHURCH QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Caroline Stone Company → CARMEL CHURCH QUARRY; 1981-04-01 to 1994-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Northeast Solite Corp → CARMEL CHURCH QUARRY; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Northeast Solite Corp → Caroline Stone Company; 1981-04-01 to 1994-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Aggregates → CARMEL CHURCH QUARRY; 1994-06-15 to 2013-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Aggregates; 1994-06-15 to 2013-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Materials, Inc. → CARMEL CHURCH QUARRY; 2013-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Materials, Inc.; 2013-02-27 to current/open; source msha-controller-operator-history