Warning Letter involving NORTHWEST PIPELINE LLC. PHMSA's enforcement data identifies the cited regulations as 192, 192.463(a), 192.467(d), 192.475(b)(3), 192.731(a). The case was opened on 2005-11-02 and is reported as closed as of 2005-11-02. Open the official case record for notices, responses, orders, and the latest status.

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Retrieved: Aug 20, 2026
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