# Relationship history for MSHA mine 1102236

Current hierarchy: **Jeffrey A  Haycraft → Springfield Coal Company LLC → Crown II 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

- **controller_controls_mine:** General Dynamics Corp → Crown II Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Freeman United Coal Mining Company → Crown II Mine; 1974-07-03 to 2007-08-31; source msha-controller-operator-history
- **controller_controls_operator:** General Dynamics Corp → Freeman United Coal Mining Company; 1974-07-03 to 2007-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Springfield Coal Company LLC → Crown II Mine; 2007-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian J  Veldhuizen et al → Crown II Mine; 2007-09-01 to 2015-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Brian J  Veldhuizen et al → Springfield Coal Company LLC; 2007-09-01 to 2015-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey A  Haycraft → Crown II Mine; 2015-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey A  Haycraft → Springfield Coal Company LLC; 2015-08-11 to current/open; source msha-controller-operator-history