# Relationship history for MSHA mine 4103321

Current hierarchy: **Koonce Anne Marie → Elm Creek Materials Inc → Mansell 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:** Seidel Inc → Mansell Pit; 1985-07-01 to 1988-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Seidel Alton F → Mansell Pit; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Seidel Alton F → Seidel Inc; 1985-07-01 to 1988-08-16; source msha-controller-operator-history
- **operator_operates_mine:** K & K Materials → Mansell Pit; 1988-08-17 to 1990-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Mansell Kyle → Mansell Pit; 1988-08-17 to 1990-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Mansell Kyle → K & K Materials; 1988-08-17 to 1990-11-18; source msha-controller-operator-history
- **operator_operates_mine:** Elm Creek Materials Inc → Mansell Pit; 1990-11-19 to 1995-04-30; source msha-controller-operator-history
- **controller_controls_mine:** John B  Frerich → Mansell Pit; 1990-11-19 to 1995-04-30; source msha-controller-operator-history
- **controller_controls_operator:** John B  Frerich → Elm Creek Materials Inc; 1990-11-19 to 1995-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Elm Creek Materials Inc → Mansell Pit; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Koonce Anne Marie → Mansell Pit; 1995-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koonce Anne Marie → Elm Creek Materials Inc; 1995-05-01 to current/open; source msha-controller-operator-history