# Relationship history for MSHA mine 2602386

Current hierarchy: **Taiheiyo Cement Corp → CalPortland, Co. → Lake View Quarry**

- 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 L  Denman → Lake View Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taiheiyo Cement Corp → Lake View Quarry; 1990-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D.L. DENMAN CONST. → Lake View Quarry; 1999-06-01 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Donald L  Denman → D.L. DENMAN CONST.; 1999-06-01 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Gypsum Mining Inc → Lake View Quarry; 2006-01-01 to 2015-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Donald L  Denman → Lake View Quarry; 2006-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald L  Denman → Pioneer Gypsum Mining Inc; 2006-01-01 to 2015-06-24; source msha-controller-operator-history
- **operator_operates_mine:** H Lima Nevada LLC → Lake View Quarry; 2015-06-25 to 2024-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Lima et al → Lake View Quarry; 2015-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Lima et al → H Lima Nevada LLC; 2015-06-25 to 2024-04-30; source msha-controller-operator-history
- **operator_operates_mine:** CalPortland, Co. → Lake View Quarry; 2024-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taiheiyo Cement Corp → CalPortland, Co.; 2024-05-01 to current/open; source msha-controller-operator-history