# Relationship history for MSHA mine 0202514

Current hierarchy: **Dale A  Deming; Eric J  Walter → Coronado Group Llc → TODD 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:** Michael  Williams → TODD PIT; 1982-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J D'S Sand & Gravel Inc → TODD PIT; 1990-03-01 to 1999-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Williams → J D'S Sand & Gravel Inc; 1990-03-01 to 1999-12-19; source msha-controller-operator-history
- **operator_operates_mine:** Coronado Group Llc → TODD PIT; 1999-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric J  Walter  et al → TODD PIT; 1999-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric J  Walter  et al → Coronado Group Llc; 1999-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale A  Deming  et al → Coronado Group Llc; 1999-12-20 to current/open; source msha-controller-operator-history