# Relationship history for MSHA mine 1900328

Current hierarchy: **Peckham Industries Inc → John S Lane & Son → Oxford Quarry Plant 74**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Harry C  Lane et al → Oxford Quarry Plant 74; 1950-01-01 to 2020-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Massachusetts Sand & Gravel Company Inc → Oxford Quarry Plant 74; 1950-01-01 to 1988-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Charles A  Scavone Jr → Oxford Quarry Plant 74; 1950-01-01 to 1988-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Charles A  Scavone Jr → Massachusetts Sand & Gravel Company Inc; 1950-01-01 to 1988-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Mass Sand & Gravel Inc → Oxford Quarry Plant 74; 1988-09-13 to 1993-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Egerton Inc → Oxford Quarry Plant 74; 1988-09-13 to 1993-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Egerton Inc → Mass Sand & Gravel Inc; 1988-09-13 to 1993-09-22; source msha-controller-operator-history
- **operator_operates_mine:** John S Lane & Son Incorporated → Oxford Quarry Plant 74; 1993-09-23 to 2021-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Harry C  Lane et al → John S Lane & Son Incorporated; 1993-09-23 to 2020-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Peckham Industries Inc → Oxford Quarry Plant 74; 2020-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peckham Industries Inc → John S Lane & Son Incorporated; 2020-01-02 to 2021-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Peckham Industries Inc → Oxford Quarry Plant 74; 2021-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** John S Lane & Son → Oxford Quarry Plant 74; 2021-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peckham Industries Inc → John S Lane & Son; 2021-02-22 to current/open; source msha-controller-operator-history