# Relationship history for MSHA mine 2100580

Current hierarchy: **Donald F Redman; Gerald A Redman → Crane Creek Construction Inc → DUNDAS 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:** Concrete Materials Inc → DUNDAS PIT; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Don  Hammel → DUNDAS PIT; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Don  Hammel → Concrete Materials Inc; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Richard C  Lundin  et al → DUNDAS PIT; 1985-04-09 to 1989-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Crane Creek Asphalt Inc → DUNDAS PIT; 1987-03-01 to 1989-03-07; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Lundin  et al → Crane Creek Asphalt Inc; 1987-03-01 to 1989-03-07; source msha-controller-operator-history
- **operator_operates_mine:** Crane Creek Construction Inc → DUNDAS PIT; 1989-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gerald A Redman et al → DUNDAS PIT; 1989-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gerald A Redman et al → Crane Creek Construction Inc; 1989-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald F Redman et al → Crane Creek Construction Inc; 1989-03-08 to current/open; source msha-controller-operator-history