# Relationship history for MSHA mine 1001034

Current hierarchy: **Parson Jack B Companies → Idaho Sand & Gravel Company Inc → 55 & Hill 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:** Masterpiece Corp Inc → 55 & Hill Pit; 1950-01-01 to 1979-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Floyd A  Patterson → 55 & Hill Pit; 1950-01-01 to 1988-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Floyd A  Patterson → Masterpiece Corp Inc; 1950-01-01 to 1979-03-19; source msha-controller-operator-history
- **operator_operates_mine:** R & T Construction → 55 & Hill Pit; 1979-03-20 to 1980-09-30; source msha-controller-operator-history
- **controller_controls_mine:** C D  Tarter  et al → 55 & Hill Pit; 1979-03-20 to 1980-12-31; source msha-controller-operator-history
- **controller_controls_operator:** C D  Tarter  et al → R & T Construction; 1979-03-20 to 1980-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Masterpiece Corp Inc → 55 & Hill Pit; 1980-10-01 to 1988-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Floyd A  Patterson → Masterpiece Corp Inc; 1980-10-01 to 1988-07-07; source msha-controller-operator-history
- **operator_operates_mine:** 55 & Hill Gravel Company → 55 & Hill Pit; 1988-07-08 to 1990-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Dowding Ray Jr → 55 & Hill Pit; 1988-07-08 to 1990-10-03; source msha-controller-operator-history
- **controller_controls_operator:** Dowding Ray Jr → 55 & Hill Gravel Company; 1988-07-08 to 1990-10-03; source msha-controller-operator-history
- **controller_controls_mine:** Parson Jack B Companies → 55 & Hill Pit; 1989-12-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Sand & Gravel Company Inc → 55 & Hill Pit; 1990-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parson Jack B Companies → Idaho Sand & Gravel Company Inc; 1990-10-04 to current/open; source msha-controller-operator-history