# Relationship history for MSHA mine 4703686

Current hierarchy: **Scott  Melbourn; Shawn  Furlong → Source Energy Services Proppants LP → Sumner Wet Plant**

- 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:** Canadian Sand And Proppants L.P. → Sumner Wet Plant; 2013-06-11 to 2013-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Neilson et al → Sumner Wet Plant; 2013-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Neilson et al → Canadian Sand And Proppants L.P.; 2013-06-11 to 2013-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Jim  McMahon et al → Canadian Sand And Proppants L.P.; 2013-06-11 to 2013-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Source Energy Services Proppants LP → Sumner Wet Plant; 2013-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  McMahon et al → Sumner Wet Plant; 2013-10-16 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Jim  McMahon et al → Source Energy Services Proppants LP; 2013-10-16 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Thompson et al → Source Energy Services Proppants LP; 2013-10-16 to 2021-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Thompson → Sumner Wet Plant; 2021-05-01 to 2022-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Thompson → Source Energy Services Proppants LP; 2021-05-01 to 2022-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Melbourn → Sumner Wet Plant; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Melbourn → Source Energy Services Proppants LP; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn  Furlong → Source Energy Services Proppants LP; 2022-10-01 to current/open; source msha-controller-operator-history