# Relationship history for MSHA mine 0103435

Current hierarchy: **David  Mercer; Kenny L  Pierce → Wetumpka Gravel, LLC → Wetumpka Gravel LLC**

- 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:** Wetumpka Gravel, LLC → Wetumpka Gravel LLC; 2011-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenny L  Pierce et al → Wetumpka Gravel LLC; 2011-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenny L  Pierce et al → Wetumpka Gravel, LLC; 2011-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Mercer et al → Wetumpka Gravel, LLC; 2011-01-04 to current/open; source msha-controller-operator-history