# Relationship history for MSHA mine 4703717

Current hierarchy: **Scott  Melbourn; Shawn  Furlong → Sand Products, WI, LLC → Highway 53**

- 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:** Sand Products, WI, LLC → Highway 53; 2014-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sand Products Corp → Highway 53; 2014-04-29 to 2017-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Sand Products Corp → Sand Products, WI, LLC; 2014-04-29 to 2017-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Jim  McMahon et al → Highway 53; 2017-04-18 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Jim  McMahon et al → Sand Products, WI, LLC; 2017-04-18 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Thompson et al → Sand Products, WI, LLC; 2017-04-18 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Thompson → Highway 53; 2021-05-01 to 2022-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Thompson → Sand Products, WI, LLC; 2021-05-01 to 2022-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Melbourn → Highway 53; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Melbourn → Sand Products, WI, LLC; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Furlong → Sand Products, WI, LLC; 2022-10-01 to current/open; source msha-controller-operator-history