# Relationship history for MSHA mine 5001452

Current hierarchy: **Cody K  Dusenberry; Robert  Knapp Jr → Northwest Gold LLC → Cripple Creek Mine**

- 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:** Noel S  Tanner  et al → Cripple Creek Mine; 1983-07-01 to 1990-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Windfall Gold Mining Corp → Cripple Creek Mine; 1984-06-17 to 1985-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Mc Donald B W → Cripple Creek Mine; 1984-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Donald B W → Windfall Gold Mining Corp; 1984-06-17 to 1985-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Anvil Mining Inc → Cripple Creek Mine; 1985-08-21 to 1990-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Noel S  Tanner  et al → Anvil Mining Inc; 1985-08-21 to 1990-05-06; source msha-controller-operator-history
- **operator_operates_mine:** Anvil Mine Joint Venture → Cripple Creek Mine; 1990-05-07 to 2011-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Anvil Mining Inc & Mat-Su Inc → Cripple Creek Mine; 1990-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anvil Mining Inc & Mat-Su Inc → Anvil Mine Joint Venture; 1990-05-07 to 2011-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Northwest Gold LLC → Cripple Creek Mine; 2011-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert T  Knappe Sr et al → Cripple Creek Mine; 2011-06-16 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert T  Knappe Sr et al → Northwest Gold LLC; 2011-06-16 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Noel S  Tanner et al → Northwest Gold LLC; 2011-06-16 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Knapp Jr et al → Cripple Creek Mine; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Knapp Jr et al → Northwest Gold LLC; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cody K  Dusenberry et al → Northwest Gold LLC; 2012-01-01 to current/open; source msha-controller-operator-history