# Relationship history for MSHA mine 3800651

Current hierarchy: **Reynolds Trucking Company LLC → Carolina Aggregate and Sand Holdings → Southeastern Sand Mine #1**

- 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:** Black River Sand & Gravel → Southeastern Sand Mine #1; 1991-10-01 to 1995-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Mary P  Mc Kenzie → Southeastern Sand Mine #1; 1991-10-01 to 1995-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Mary P  Mc Kenzie → Black River Sand & Gravel; 1991-10-01 to 1995-04-30; source msha-controller-operator-history
- **operator_operates_mine:** South Carolina Prestress Sand Plant #2 → Southeastern Sand Mine #1; 1995-05-01 to 2006-05-03; source msha-controller-operator-history
- **controller_controls_mine:** C B  Askins Sr → Southeastern Sand Mine #1; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C B  Askins Sr → South Carolina Prestress Sand Plant #2; 1995-05-01 to 2006-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Southeastern Sand LLC → Southeastern Sand Mine #1; 2006-05-04 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Christopher  Cox  et al → Southeastern Sand Mine #1; 2006-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Cox  et al → Southeastern Sand LLC; 2006-05-04 to 2018-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Cox  et al → Southeastern Sand LLC; 2006-05-04 to 2018-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Southeastern Sand Company LLC → Southeastern Sand Mine #1; 2018-11-01 to 2025-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Cox  et al → Southeastern Sand Mine #1; 2018-11-01 to 2022-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Cox  et al → Southeastern Sand Company LLC; 2018-11-01 to 2022-10-30; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Cox  et al → Southeastern Sand Company LLC; 2018-11-01 to 2022-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Reynolds → Southeastern Sand Mine #1; 2022-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Reynolds → Southeastern Sand Company LLC; 2022-10-31 to 2025-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Bruce  Reynolds → Southeastern Sand Mine #1; 2024-07-11 to 2025-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Carolina Aggregate and Sand Holdings → Southeastern Sand Mine #1; 2025-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  Reynolds → Carolina Aggregate and Sand Holdings; 2025-02-18 to 2025-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Reynolds Trucking Company LLC → Southeastern Sand Mine #1; 2025-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reynolds Trucking Company LLC → Carolina Aggregate and Sand Holdings; 2025-02-18 to current/open; source msha-controller-operator-history