# Relationship history for MSHA mine 1002036

Current hierarchy: **Case E  Stedham → Western Construction of Lewiston,  Inc → Plant 3**

- 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:** Ross  Triplett → Plant 3; 1999-02-24 to 2021-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Tripco, Inc → Plant 3; 2003-02-07 to 2022-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ross  Triplett → Tripco, Inc; 2003-02-07 to 2021-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Case E  Stedham → Plant 3; 2018-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Case E  Stedham → Plant 3; 2021-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Case E  Stedham → Tripco, Inc; 2021-06-30 to 2022-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Western Construction of Lewiston,  Inc → Plant 3; 2022-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Case E  Stedham → Western Construction of Lewiston,  Inc; 2022-04-01 to current/open; source msha-controller-operator-history