# Relationship history for MSHA mine 3608830

Current hierarchy: **Gary  Lucas → Lykens Coal Company → Lykens Slope #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

- **operator_operates_mine:** Lykens Coal Company → Lykens Slope #1; 1999-08-01 to 2000-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Cress → Lykens Slope #1; 1999-08-01 to 2000-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Cress → Lykens Coal Company; 1999-08-01 to 2000-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Lykens Coal Company → Lykens Slope #1; 2000-11-15 to 2002-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Lucas et al → Lykens Slope #1; 2000-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Lucas et al → Lykens Coal Company; 2000-11-15 to 2002-09-03; source msha-controller-operator-history
- **operator_operates_mine:** B and H Coal Co. → Lykens Slope #1; 2002-09-04 to 2002-10-23; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Bixler et al → Lykens Slope #1; 2002-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Bixler et al → B and H Coal Co.; 2002-09-04 to 2002-10-23; source msha-controller-operator-history
- **controller_controls_operator:** David  Hoffman et al → B and H Coal Co.; 2002-09-04 to 2002-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Lykens Coal Company → Lykens Slope #1; 2002-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Lucas et al → Lykens Coal Company; 2002-10-24 to current/open; source msha-controller-operator-history