# Relationship history for MSHA mine 4503062

Current hierarchy: **Donald M  March → Wilder Construction Company → 113TH AVE 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:** Donald M  March et al → 113TH AVE PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doris  Martin → 113TH AVE PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harry L  Sumrok et al → 113TH AVE PIT; 1985-06-26 to 1988-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Jkh Investments Inc → 113TH AVE PIT; 1985-10-01 to 1988-11-01; source msha-controller-operator-history
- **controller_controls_operator:** Harry L  Sumrok et al → Jkh Investments Inc; 1985-10-01 to 1988-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Tom Martin Construction Inc → 113TH AVE PIT; 1988-11-02 to 1994-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Doris  Martin → Tom Martin Construction Inc; 1988-11-02 to 1994-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Wilder Construction Company → 113TH AVE PIT; 1994-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald M  March et al → Wilder Construction Company; 1994-04-05 to current/open; source msha-controller-operator-history