# Relationship history for MSHA mine 3102255

Current hierarchy: **Wayne  Cassavaugh → CAROLINA SAND, INC. → MCMAHAN SAND PIT**

- 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

- **controller_controls_mine:** Wayne  Cassavaugh → MCMAHAN SAND PIT; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CAROLINA SAND, INC. → MCMAHAN SAND PIT; 2009-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Cassavaugh → CAROLINA SAND, INC.; 2009-11-16 to current/open; source msha-controller-operator-history