# Relationship history for MSHA mine 1700581

Current hierarchy: **Stephen M  Perry → Mainely Sand & Gravel → Pullen Pit A**

- 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:** Pullen Heavy Industries LLC → Pullen Pit A; 1986-12-01 to 2012-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Scott E  Pullen → Pullen Pit A; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott E  Pullen → Pullen Heavy Industries LLC; 1986-12-01 to 2012-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Mainely Sand & Gravel → Pullen Pit A; 2012-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen M  Perry → Pullen Pit A; 2012-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen M  Perry → Mainely Sand & Gravel; 2012-04-01 to current/open; source msha-controller-operator-history