# Relationship history for MSHA mine 2101299

Current hierarchy: **Tim L  Becken; Thorwald L  Becken → Cemstone Products Company → LAKE CITY 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:** Tim L Becken et al → LAKE CITY PIT; 1950-01-01 to 2025-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Lake City Concrete Products Company → LAKE CITY PIT; 1950-01-01 to 1985-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Marce  Walters → LAKE CITY PIT; 1950-01-01 to 1985-11-05; source msha-controller-operator-history
- **controller_controls_operator:** Marce  Walters → Lake City Concrete Products Company; 1950-01-01 to 1985-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Lake City Ready Mix → LAKE CITY PIT; 1985-11-06 to 1991-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Louis  Boehmke et al → LAKE CITY PIT; 1985-11-06 to 1991-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Louis  Boehmke et al → Lake City Ready Mix; 1985-11-06 to 1991-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Cemstone Products Company → LAKE CITY PIT; 1991-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim L Becken et al → Cemstone Products Company; 1991-04-22 to 2025-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Hammond T Becken et al → Cemstone Products Company; 1991-04-22 to 2025-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Tim L  Becken et al → LAKE CITY PIT; 2025-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim L  Becken et al → Cemstone Products Company; 2025-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thorwald L  Becken et al → Cemstone Products Company; 2025-08-18 to current/open; source msha-controller-operator-history