# Relationship history for MSHA mine 1900569

Current hierarchy: **Todd  Marion → MARION EXCAVATING CO., INC. → MARION EXCAVATING CO., 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:** Westhampton Sand & Gravel Inc → MARION EXCAVATING CO., INC.; 1950-01-01 to 1982-04-01; source msha-controller-operator-history
- **controller_controls_mine:** John  Maroney → MARION EXCAVATING CO., INC.; 1950-01-01 to 1982-04-01; source msha-controller-operator-history
- **controller_controls_operator:** John  Maroney → Westhampton Sand & Gravel Inc; 1950-01-01 to 1982-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Meehan Construction Company Inc → MARION EXCAVATING CO., INC.; 1982-04-02 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_mine:** James E  Meehan → MARION EXCAVATING CO., INC.; 1982-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Meehan → Meehan Construction Company Inc; 1982-04-02 to 2022-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Marion Excavating Co., Inc. → MARION EXCAVATING CO., INC.; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Marion → MARION EXCAVATING CO., INC.; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Marion → Marion Excavating Co., Inc.; 2023-01-01 to current/open; source msha-controller-operator-history