# Relationship history for MSHA mine 3300789

Current hierarchy: **Denton  Bowman; Larry  Darlington → Waterloo Coal Co Inc → Oak Hill Tipple**

- 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:** Waterloo Coal Company → Oak Hill Tipple; 1950-01-01 to 1988-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Phil A  Bowman  et al → Oak Hill Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phil A  Bowman  et al → Waterloo Coal Company; 1950-01-01 to 1988-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Theodore L  Darlington → Oak Hill Tipple; 1988-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Waterloo Coal Co., Inc. → Oak Hill Tipple; 1988-10-13 to 2021-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Theodore L  Darlington → Waterloo Coal Co., Inc.; 1988-10-13 to 2021-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Wells Jr  et al → Oak Hill Tipple; 2019-09-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Resources Ohio, LLC → Oak Hill Tipple; 2021-01-15 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Wells Jr  et al → Cheyenne Resources Ohio, LLC; 2021-01-15 to 2024-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Ricky D  Kirk  et al → Cheyenne Resources Ohio, LLC; 2021-01-15 to 2024-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Waterloo Coal Co Inc → Oak Hill Tipple; 2024-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Darlington et al → Oak Hill Tipple; 2024-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Darlington et al → Waterloo Coal Co Inc; 2024-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Denton  Bowman et al → Waterloo Coal Co Inc; 2024-03-01 to current/open; source msha-controller-operator-history