# Relationship history for MSHA mine 1000467

Current hierarchy: **Sandy  Sims; Eric  Sims → Democrat Resources LLC → Democrat 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:** Petro-Chem Inc → Democrat Mine; 1950-01-01 to 1983-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Petro-Chem Inc → Democrat Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petro-Chem Inc → Petro-Chem Inc; 1950-01-01 to 1983-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Democrat Resources Inc → Democrat Mine; 1983-05-18 to 1987-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Cook Neil → Democrat Mine; 1983-05-18 to 1987-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Cook Neil → Democrat Resources Inc; 1983-05-18 to 1987-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Democrat Mine → Democrat Mine; 1987-07-01 to 2011-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Sims Sandy H → Democrat Mine; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sims Sandy H → Democrat Mine; 1987-07-01 to 2011-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Democrat Resources LLC → Democrat Mine; 2011-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sandy  Sims et al → Democrat Mine; 2011-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sandy  Sims et al → Democrat Resources LLC; 2011-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric  Sims et al → Democrat Resources LLC; 2011-04-01 to current/open; source msha-controller-operator-history