# Relationship history for MSHA mine 3608031

Current hierarchy: **Charles  Cress → Blackwood Mining → Skidmore Slope**

- 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:** Rhen Coal Company → Skidmore Slope; 1988-08-01 to 2001-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Rhen → Skidmore Slope; 1988-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Rhen → Rhen Coal Company; 1988-08-01 to 2001-11-01; source msha-controller-operator-history
- **operator_operates_mine:** P D & A Coal Co. → Skidmore Slope; 2001-11-02 to 2002-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Lazarchick → Skidmore Slope; 2001-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Lazarchick → P D & A Coal Co.; 2001-11-02 to 2002-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Albert R  Carl → P D & A Coal Co.; 2001-11-02 to 2002-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Rhen Coal Co. → Skidmore Slope; 2002-02-01 to 2003-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Kevin L  Rittenbaugh et al → Skidmore Slope; 2002-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin L  Rittenbaugh et al → Rhen Coal Co.; 2002-02-01 to 2003-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Jeremy C  Rittenbaugh et al → Rhen Coal Co.; 2002-02-01 to 2003-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Rhen Coal Co. → Skidmore Slope; 2003-08-06 to 2009-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Robert E Bachman et al → Skidmore Slope; 2003-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E Bachman et al → Rhen Coal Co.; 2003-08-06 to 2009-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Russell R  White et al → Skidmore Slope; 2006-07-13 to 2009-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Blackwood Mining → Skidmore Slope; 2009-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell R  White et al → Blackwood Mining; 2009-04-21 to 2009-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Charles J  Cress et al → Blackwood Mining; 2009-04-21 to 2009-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Cress → Skidmore Slope; 2009-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Cress → Blackwood Mining; 2009-04-21 to current/open; source msha-controller-operator-history