# Relationship history for MSHA mine 3608597

Current hierarchy: **William T HIll → Penn Slate → DALLY #2 - QUARRY & MILLS**

- 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:** Peter J  Papay Sr et al → DALLY #2 - QUARRY & MILLS; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dally Slate Company → DALLY #2 - QUARRY & MILLS; 1981-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dally Slate Company → DALLY #2 - QUARRY & MILLS; 1996-12-01 to 2004-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Dally Slate Company → Dally Slate Company; 1996-12-01 to 2004-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Penn Big Bed Slate Co., Inc.-Dally Division → DALLY #2 - QUARRY & MILLS; 2005-01-01 to 2022-08-04; source msha-controller-operator-history
- **controller_controls_operator:** Peter J  Papay Sr et al → Penn Big Bed Slate Co., Inc.-Dally Division; 2005-01-01 to 2022-08-04; source msha-controller-operator-history
- **controller_controls_mine:** William T HIll → DALLY #2 - QUARRY & MILLS; 2022-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Penn Slate → DALLY #2 - QUARRY & MILLS; 2022-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William T HIll → Penn Slate; 2022-08-05 to current/open; source msha-controller-operator-history