# Relationship history for MSHA mine 0801437

Current hierarchy: **Chester G Townsend II; Brittany C Warner; Melissa A Townsend; John F Tow → Townsend Fill Dirt & Site Prep LLC → Townsend Dirt 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:** Townsend Fill Dirt & Site Prep LLC → Townsend Dirt Pit; 2021-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brittany C Warner et al → Townsend Dirt Pit; 2021-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brittany C Warner et al → Townsend Fill Dirt & Site Prep LLC; 2021-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melissa A Townsend et al → Townsend Fill Dirt & Site Prep LLC; 2021-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John F Townsend et al → Townsend Fill Dirt & Site Prep LLC; 2021-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester G Townsend II et al → Townsend Fill Dirt & Site Prep LLC; 2021-10-07 to current/open; source msha-controller-operator-history