# Relationship history for MSHA mine 3608898

Current hierarchy: **David S  Herrholtz → DERRY STONE &  LIME COMPANY → LIGONIER ST & LM CO DBA DERRY STN & LIME**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Derry Stone & Lime Co., Inc. → LIGONIER ST & LM CO DBA DERRY STN & LIME; 2000-12-01 to 2005-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Daniel G  Slavek III et al → LIGONIER ST & LM CO DBA DERRY STN & LIME; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel G  Slavek III et al → Derry Stone & Lime Co., Inc.; 2000-12-01 to 2005-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Derry Stone &  Lime Company → LIGONIER ST & LM CO DBA DERRY STN & LIME; 2005-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David S  Herrholtz → LIGONIER ST & LM CO DBA DERRY STN & LIME; 2005-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David S  Herrholtz → Derry Stone &  Lime Company; 2005-04-01 to current/open; source msha-controller-operator-history