# Relationship history for MSHA mine 1103184

Current hierarchy: **Derrek  Henry; Shawn  Henry → Pekin Sand & Gravel, LLC → Pekin Sand & 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

- **controller_controls_mine:** Joseph A  Scharf et al → Pekin Sand & Gravel, LLC; 1997-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carri Scharf Materials Co → Pekin Sand & Gravel, LLC; 2007-11-11 to 2012-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Joseph A  Scharf et al → Carri Scharf Materials Co; 2007-11-11 to 2012-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Pekin Sand & Gravel, LLC → Pekin Sand & Gravel, LLC; 2012-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Derrek  Henry et al → Pekin Sand & Gravel, LLC; 2012-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Derrek  Henry et al → Pekin Sand & Gravel, LLC; 2012-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Henry et al → Pekin Sand & Gravel, LLC; 2012-05-01 to current/open; source msha-controller-operator-history