# Relationship history for MSHA mine 3401906

Current hierarchy: **Melvin D  Henson  Jr; Annette D  Henson → MAVERICK ENERGY SERVICES LLC → Henson Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Henson Ranch → Henson Gravel; 2003-03-24 to 2016-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Annette D  Henson  et al → Henson Gravel; 2003-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Annette D  Henson  et al → Henson Ranch; 2003-03-24 to 2016-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Melvin D  Henson  Jr  et al → Henson Ranch; 2003-03-24 to 2016-11-14; source msha-controller-operator-history
- **operator_operates_mine:** MAVERICK ENERGY SERVICES LLC → Henson Gravel; 2016-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Annette D  Henson  et al → Henson Gravel; 2016-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Annette D  Henson  et al → MAVERICK ENERGY SERVICES LLC; 2016-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melvin D  Henson  Jr  et al → MAVERICK ENERGY SERVICES LLC; 2016-11-15 to current/open; source msha-controller-operator-history