# Relationship history for MSHA mine 4105275

Current hierarchy: **Kolton  Linthicum; Chad R Sparks → Black Diamond Endeavors → Black Diamond Endeavors LLC**

- 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:** River Road Aggregates → Black Diamond Endeavors LLC; 2017-07-12 to 2019-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth W Doucet et al → Black Diamond Endeavors LLC; 2017-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth W Doucet et al → River Road Aggregates; 2017-07-12 to 2019-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Sonya J Doucet et al → River Road Aggregates; 2017-07-12 to 2019-04-08; source msha-controller-operator-history
- **operator_operates_mine:** River Road Aggregates LLC → Black Diamond Endeavors LLC; 2019-04-09 to 2025-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Art  Linthicum et al → Black Diamond Endeavors LLC; 2019-04-09 to 2024-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Art  Linthicum et al → River Road Aggregates LLC; 2019-04-09 to 2024-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Kolton  Linthicum et al → River Road Aggregates LLC; 2019-04-09 to 2024-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Kolton  Linthicum et al → Black Diamond Endeavors LLC; 2024-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kolton  Linthicum et al → River Road Aggregates LLC; 2024-02-22 to 2025-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Chad R Sparks et al → River Road Aggregates LLC; 2024-02-22 to 2025-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Endeavors → Black Diamond Endeavors LLC; 2025-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kolton  Linthicum et al → Black Diamond Endeavors LLC; 2025-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kolton  Linthicum et al → Black Diamond Endeavors; 2025-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad R Sparks et al → Black Diamond Endeavors; 2025-06-18 to current/open; source msha-controller-operator-history