# Relationship history for MSHA mine 4703744

Current hierarchy: **Daniel L  Silha → Southern Wisconsin Aggregate Corporation → ASTEC CRUSHER-PORTABLE**

- 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:** Donald E  Frank et al → ASTEC CRUSHER-PORTABLE; 1950-01-01 to 2015-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Daniel L  Silha → ASTEC CRUSHER-PORTABLE; 2010-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** FRANK BROS., INC → ASTEC CRUSHER-PORTABLE; 2015-01-29 to 2019-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Donald E  Frank et al → FRANK BROS., INC; 2015-01-29 to 2015-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Kyle  Frank et al → ASTEC CRUSHER-PORTABLE; 2015-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kyle  Frank et al → FRANK BROS., INC; 2015-09-15 to 2019-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Frank et al → FRANK BROS., INC; 2015-09-15 to 2019-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Southern Wisconsin Aggregate Corporation → ASTEC CRUSHER-PORTABLE; 2019-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel L  Silha → Southern Wisconsin Aggregate Corporation; 2019-10-07 to current/open; source msha-controller-operator-history