# Relationship history for MSHA mine 0402710

Current hierarchy: **Robert C  McLaughlin; Michael J  McLaughlin → Eureka Sand & Gravel Co Inc → Eureka Ready Arcata Pit**

- 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:** Lynn Duarte Company → Eureka Ready Arcata Pit; 1950-01-01 to 1979-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Duarte Lynn → Eureka Ready Arcata Pit; 1950-01-01 to 1979-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Duarte Lynn → Lynn Duarte Company; 1950-01-01 to 1979-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  McLaughlin et al → Eureka Ready Arcata Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arcata Readimix → Eureka Ready Arcata Pit; 1979-07-28 to 2002-02-28; source msha-controller-operator-history
- **controller_controls_mine:** William  O'Neill → Eureka Ready Arcata Pit; 1979-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  O'Neill → Arcata Readimix; 1979-07-28 to 2002-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Eureka Sand & Gravel Co Inc → Eureka Ready Arcata Pit; 2002-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  McLaughlin et al → Eureka Sand & Gravel Co Inc; 2002-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  McLaughlin et al → Eureka Sand & Gravel Co Inc; 2002-03-01 to current/open; source msha-controller-operator-history