# Relationship history for MSHA mine 1000797

Current hierarchy: **Brenda  Moosman → Treasure Canyon Calcium Company → Treasure Canyon Calcium Company Qua**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Treasure Canyon Calcium Company → Treasure Canyon Calcium Company Qua; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** N Ross  Smith → Treasure Canyon Calcium Company Qua; 1950-01-01 to 2016-10-31; source msha-controller-operator-history
- **controller_controls_operator:** N Ross  Smith → Treasure Canyon Calcium Company; 1950-01-01 to 2016-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Stacie S Steadman → Treasure Canyon Calcium Company Qua; 2016-11-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Stacie S Steadman → Treasure Canyon Calcium Company; 2016-11-01 to 2022-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Brenda  Moosman et al → Treasure Canyon Calcium Company Qua; 2023-01-01 to 2024-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Brenda  Moosman et al → Treasure Canyon Calcium Company; 2023-01-01 to 2024-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Moosman et al → Treasure Canyon Calcium Company; 2023-01-01 to 2024-11-18; source msha-controller-operator-history
- **controller_controls_mine:** Brenda  Moosman → Treasure Canyon Calcium Company Qua; 2024-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brenda  Moosman → Treasure Canyon Calcium Company; 2024-11-19 to current/open; source msha-controller-operator-history