# Relationship history for MSHA mine 3100159

Current hierarchy: **E Craig  Sasser → Yadkin Brick Company → YADKIN PIT**

- 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:** Yadkin Brick Company Inc → YADKIN PIT; 1950-01-01 to 1980-12-09; source msha-controller-operator-history
- **controller_controls_mine:** G M  Isenhour Jr → YADKIN PIT; 1950-01-01 to 1980-12-09; source msha-controller-operator-history
- **controller_controls_operator:** G M  Isenhour Jr → Yadkin Brick Company Inc; 1950-01-01 to 1980-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Yadkin Brick Company → YADKIN PIT; 1980-12-10 to 1994-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Prichard  Dennis → YADKIN PIT; 1980-12-10 to 1994-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Prichard  Dennis → Yadkin Brick Company; 1980-12-10 to 1994-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Yadkin Brick Company Inc → YADKIN PIT; 1994-08-01 to 1997-02-03; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Jordan → YADKIN PIT; 1994-08-01 to 1997-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Jordan → Yadkin Brick Company Inc; 1994-08-01 to 1997-02-03; source msha-controller-operator-history
- **operator_operates_mine:** Yadkin Brick Company → YADKIN PIT; 1997-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** E Craig  Sasser → YADKIN PIT; 1997-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E Craig  Sasser → Yadkin Brick Company; 1997-02-04 to current/open; source msha-controller-operator-history