# Relationship history for MSHA mine 2002492

Current hierarchy: **Carl  Tuttle → Livingston Aggregate, Inc. → Livingston Aggregate, 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:** Livingston Aggregate Inc → Livingston Aggregate, Inc.; 1979-01-01 to 1986-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Schroder → Livingston Aggregate, Inc.; 1979-01-01 to 1986-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Schroder → Livingston Aggregate Inc; 1979-01-01 to 1986-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Livingston Aggregate, Inc. → Livingston Aggregate, Inc.; 1986-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Tuttle → Livingston Aggregate, Inc.; 1986-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Tuttle → Livingston Aggregate, Inc.; 1986-07-31 to current/open; source msha-controller-operator-history