# Relationship history for MSHA mine 2501247

Current hierarchy: **Boe  Coleman; Tony  Emme; Joel  Sinclair → Choteau Creek Gravel, LLC → Mobile Plant #1**

- 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:** Stephen J  Schaaf → Mobile Plant #1; 1950-01-01 to 2019-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Atkinson Sand & Gravel Inc → Mobile Plant #1; 2008-06-24 to 2024-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Stephen J  Schaaf → Atkinson Sand & Gravel Inc; 2008-06-24 to 2019-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Trista R  Schaaf → Mobile Plant #1; 2019-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trista R  Schaaf → Atkinson Sand & Gravel Inc; 2019-05-01 to 2024-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Emme Sand & Gravel, Inc. → Mobile Plant #1; 2024-03-19 to 2026-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Emme → Mobile Plant #1; 2024-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Emme → Emme Sand & Gravel, Inc.; 2024-03-19 to 2026-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Becky  Emme → Emme Sand & Gravel, Inc.; 2024-03-19 to 2026-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Choteau Creek Gravel, LLC → Mobile Plant #1; 2026-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joel  Sinclair et al → Mobile Plant #1; 2026-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel  Sinclair et al → Choteau Creek Gravel, LLC; 2026-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boe  Coleman et al → Choteau Creek Gravel, LLC; 2026-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Emme et al → Choteau Creek Gravel, LLC; 2026-01-16 to current/open; source msha-controller-operator-history