# Relationship history for MSHA mine 3609115

Current hierarchy: **John J  Allen; William D  Allen → Allen Excavating & Trucking Co., Inc. → Allen No. 1 Surface Mine**

- 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:** Allen Excavating & Trucking Co., Inc. → Allen No. 1 Surface Mine; 2002-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William D  Allen et al → Allen No. 1 Surface Mine; 2002-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D  Allen et al → Allen Excavating & Trucking Co., Inc.; 2002-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John J  Allen et al → Allen Excavating & Trucking Co., Inc.; 2002-08-16 to current/open; source msha-controller-operator-history