# Relationship history for MSHA mine 2902483

Current hierarchy: **Douglas Eugene  Murray; Waunita I  Murray → ABC Concrete Manufacturing, Inc. → ABC Pit #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:** ABC Concrete Manufacturing, Inc. → ABC Pit #1; 2017-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas Andrew  Murray et al → ABC Pit #1; 2017-09-29 to 2025-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Douglas Andrew  Murray et al → ABC Concrete Manufacturing, Inc.; 2017-09-29 to 2025-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Douglas Eugene  Murray et al → ABC Concrete Manufacturing, Inc.; 2017-09-29 to 2025-03-30; source msha-controller-operator-history
- **controller_controls_mine:** Waunita I  Murray et al → ABC Pit #1; 2025-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waunita I  Murray et al → ABC Concrete Manufacturing, Inc.; 2025-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas Eugene  Murray et al → ABC Concrete Manufacturing, Inc.; 2025-03-31 to current/open; source msha-controller-operator-history