# Relationship history for MSHA mine 4703836

Current hierarchy: **Daniel L  Silha → Southern Wisconsin Aggregate Corporation → Graystone Wash Screen**

- 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 → Graystone Wash Screen; 1950-01-01 to 2015-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Daniel L  Silha → Graystone Wash Screen; 2010-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kyle  Frank et al → Graystone Wash Screen; 2015-09-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Frank Bros., Inc. → Graystone Wash Screen; 2019-01-01 to 2019-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Kyle  Frank et al → Frank Bros., Inc.; 2019-01-01 to 2019-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Frank et al → Frank Bros., Inc.; 2019-01-01 to 2019-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Donald E  Frank et al → Frank Bros., Inc.; 2019-01-01 to 2015-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Southern Wisconsin Aggregate Corporation → Graystone Wash Screen; 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