# Relationship history for MSHA mine 3303654

Current hierarchy: **Mc Carty Rick & Jan → Mc Carty Construction Inc → Waterloo Dock #2**

- 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:** Conrich Of Ohio Inc → Waterloo Dock #2; 1977-10-01 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Lee  Congleton → Waterloo Dock #2; 1977-10-01 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Congleton → Conrich Of Ohio Inc; 1977-10-01 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Theodore L  Darlington → Waterloo Dock #2; 1988-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waterloo Coal Company Inc → Waterloo Dock #2; 1993-11-01 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Theodore L  Darlington → Waterloo Coal Company Inc; 1993-11-01 to 1998-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Mc Carty Construction Inc → Waterloo Dock #2; 1998-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Carty Rick & Jan → Waterloo Dock #2; 1998-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Carty Rick & Jan → Mc Carty Construction Inc; 1998-07-01 to current/open; source msha-controller-operator-history