# Relationship history for MSHA mine 3001581

Current hierarchy: **Daniel R Gernatt Jr → Gernatt Asphalt Products, Inc → Springville**

- 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:** John L Benz Sand & Gravel Company → Springville; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** John L Benz Sand & Gravel Company → Springville; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** John L Benz Sand & Gravel Company → John L Benz Sand & Gravel Company; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Gernatt Asphalt Products, Inc → Springville; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Gernatt Sr et al → Springville; 1979-11-01 to 2014-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Gernatt Sr et al → Gernatt Asphalt Products, Inc; 1979-11-01 to 2014-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Daniel R Gernatt Jr et al → Springville; 2014-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel R Gernatt Jr et al → Gernatt Asphalt Products, Inc; 2014-05-05 to current/open; source msha-controller-operator-history