# Relationship history for MSHA mine 2200616

Current hierarchy: **John T  Lavender → Lavender Sand & Gravel → LAVENDER 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

- **operator_operates_mine:** Strickland Gravel Pit → LAVENDER PIT; 1990-01-01 to 2001-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Strickland Gene → LAVENDER PIT; 1990-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Strickland Gene → Strickland Gravel Pit; 1990-01-01 to 2001-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Lavender Sand & Gravel → LAVENDER PIT; 2001-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John T  Lavender → LAVENDER PIT; 2001-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John T  Lavender → Lavender Sand & Gravel; 2001-08-16 to current/open; source msha-controller-operator-history