# Relationship history for MSHA mine 3101790

Current hierarchy: **Blue Water Industries Holdings 2 LLC → Blue Water Industries II LLC → Yancey Quarry**

- 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:** Yancey Sand & Gravel Company → Yancey Quarry; 1950-01-01 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Barbara  Riddle et al → Yancey Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara  Riddle et al → Yancey Sand & Gravel Company; 1950-01-01 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Jess  Cooper et al → Yancey Sand & Gravel Company; 1950-01-01 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Yancey Stone Inc → Yancey Quarry; 1993-07-01 to 2021-11-11; source msha-controller-operator-history
- **controller_controls_mine:** William M  McCrary → Yancey Quarry; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William M  McCrary → Yancey Stone Inc; 1993-07-01 to 2021-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Blue Water Industries Holdings LLC → Yancey Quarry; 2017-12-29 to 2024-04-28; source msha-controller-operator-history
- **operator_operates_mine:** Blue Water Industries → Yancey Quarry; 2021-11-12 to 2024-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Blue Water Industries Holdings LLC → Blue Water Industries; 2021-11-12 to 2024-04-28; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Yancey Quarry; 2024-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Blue Water Industries; 2024-04-29 to 2024-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Blue Water Industries Holdings 2 LLC → Yancey Quarry; 2024-05-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Water Industries II LLC → Yancey Quarry; 2024-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blue Water Industries Holdings 2 LLC → Blue Water Industries II LLC; 2024-08-26 to current/open; source msha-controller-operator-history