# Relationship history for MSHA mine 2402227

Current hierarchy: **Brad  Mercord → Montana Rockworks Inc. → Twin Creek**

- 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:** Bill  Carter et al → Twin Creek; 2001-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Montana Rockworks LLP → Twin Creek; 2001-09-01 to 2011-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Carter et al → Montana Rockworks LLP; 2001-09-01 to 2011-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Mercord et al → Montana Rockworks LLP; 2001-09-01 to 2011-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Carter et al → Twin Creek; 2007-09-14 to 2023-01-06; source msha-controller-operator-history
- **operator_operates_mine:** Montana Rockworks Inc. → Twin Creek; 2011-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Carter et al → Montana Rockworks Inc.; 2011-09-12 to 2023-01-06; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Mercord et al → Montana Rockworks Inc.; 2011-09-12 to 2023-01-06; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Mercord → Twin Creek; 2023-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Mercord → Montana Rockworks Inc.; 2023-01-07 to current/open; source msha-controller-operator-history