# Relationship history for MSHA mine 3603093

Current hierarchy: **Blaschak Holding Corp → Blaschak Anthracite Corporation → Burring Division**

- 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

- **controller_controls_mine:** Walter  Folger et al → Burring Division; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North Line Coal Company → Burring Division; 1950-01-01 to 1976-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Chapleski Leonard → Burring Division; 1950-01-01 to 1976-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Chapleski Leonard → North Line Coal Company; 1950-01-01 to 1976-04-08; source msha-controller-operator-history
- **operator_operates_mine:** Ranshaw Transportation & Auto Wreckers Company → Burring Division; 1976-04-09 to 1977-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Walter  Folger et al → Ranshaw Transportation & Auto Wreckers Company; 1976-04-09 to 1977-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Leonard  Chapleski et al → Ranshaw Transportation & Auto Wreckers Company; 1976-04-09 to 1977-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Churchill Coal Corp → Burring Division; 1977-12-14 to 1981-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Gordon → Burring Division; 1977-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Gordon → Churchill Coal Corp; 1977-12-14 to 1981-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Michael R  Burns → Burring Division; 1980-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burns Coal Company → Burring Division; 1981-10-29 to 1983-10-12; source msha-controller-operator-history
- **controller_controls_operator:** Michael R  Burns → Burns Coal Company; 1981-10-29 to 1983-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Blaschak Holding Corp → Burring Division; 1981-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blaschak Anthracite Corporation → Burring Division; 1983-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blaschak Holding Corp → Blaschak Anthracite Corporation; 1983-10-13 to current/open; source msha-controller-operator-history