# Relationship history for MSHA mine 3003765

Current hierarchy: **Dennis E  Condron → B & E Land Development → B & E Land Development**

- 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:** D & M Sand & Gravel Inc → B & E Land Development; 2010-06-05 to 2015-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Dennis J  Lamke → B & E Land Development; 2010-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis J  Lamke → D & M Sand & Gravel Inc; 2010-06-05 to 2015-08-16; source msha-controller-operator-history
- **operator_operates_mine:** PLT Sand & Gravel → B & E Land Development; 2015-08-17 to 2026-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Andrew F Wojtkowski et al → B & E Land Development; 2015-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew F Wojtkowski et al → PLT Sand & Gravel; 2015-08-17 to 2026-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Richard N Wojtkowski et al → PLT Sand & Gravel; 2015-08-17 to 2026-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Albert S Wojtkowski et al → PLT Sand & Gravel; 2015-08-17 to 2026-07-05; source msha-controller-operator-history
- **operator_operates_mine:** B & E Land Development → B & E Land Development; 2026-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis E  Condron → B & E Land Development; 2026-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis E  Condron → B & E Land Development; 2026-07-06 to current/open; source msha-controller-operator-history