# Relationship history for MSHA mine 1519832

Current hierarchy: **Dallas  Groth → MAPLE CREEK LLC → HOWARDS CREEK MINE**

- 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:** GSI Coal & Mining LLC → HOWARDS CREEK MINE; 2018-08-15 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Swiss Allied Trust & Estate Services Inc et al → HOWARDS CREEK MINE; 2018-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Swiss Allied Trust & Estate Services Inc et al → GSI Coal & Mining LLC; 2018-08-15 to 2023-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Jerry Gross Irrevocable Family Trust et al → GSI Coal & Mining LLC; 2018-08-15 to 2023-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Maple Creek Mining, LLC → HOWARDS CREEK MINE; 2023-03-28 to 2024-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Dallas  Groth → HOWARDS CREEK MINE; 2023-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dallas  Groth → Maple Creek Mining, LLC; 2023-03-28 to 2024-07-11; source msha-controller-operator-history
- **operator_operates_mine:** Bulldog Development, LLC → HOWARDS CREEK MINE; 2024-07-12 to 2025-08-24; source msha-controller-operator-history
- **controller_controls_mine:** (Samuel) Ryan  Allen → HOWARDS CREEK MINE; 2024-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** (Samuel) Ryan  Allen → Bulldog Development, LLC; 2024-07-12 to 2025-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Maple Creek LLC → HOWARDS CREEK MINE; 2025-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dallas  Groth → Maple Creek LLC; 2025-08-25 to current/open; source msha-controller-operator-history