# Relationship history for MSHA mine 2103973

Current hierarchy: **Joshua  Lange; Jordan  Lange; Trevor  Lange; Tylor  Lange → Lange Trenching Inc. → Wash Plant 1**

- 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:** Lange Trenching Inc. → Wash Plant 1; 2020-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey  Lange et al → Wash Plant 1; 2020-04-29 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey  Lange et al → Lange Trenching Inc.; 2020-04-29 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Dale  Lange et al → Lange Trenching Inc.; 2020-04-29 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Tylor  Lange et al → Wash Plant 1; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tylor  Lange et al → Lange Trenching Inc.; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jordan  Lange et al → Lange Trenching Inc.; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joshua  Lange et al → Lange Trenching Inc.; 2023-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trevor  Lange et al → Lange Trenching Inc.; 2023-01-01 to current/open; source msha-controller-operator-history