With a top drug-detection dog in tow, sheriff's deputies in King County, Washington, seized more than 200 pounds of methamphetamine, heroin, and nearly $90,000 in suspected drug proceeds in a Dec. 17 operation that law enforcement officials say struck a significant blow to a Sinaloa cartel-linked drug pipeline feeding the Pacific Northwest.

The large haul highlights continued cartel presence in western Washington and comes amid ongoing efforts to disrupt transnational drug networks.

In an operation dubbed "Operation Eastbound and Down: The Last Chapter," King County deputies confiscated 214 pounds of methamphetamine, 5 pounds of heroin, and $89,780 in cash.

Investigators estimate the street value of the drugs at roughly $2 million.

One suspect was arrested and booked into Snohomish County Jail. The sheriff's office declined to disclose the location of the seizure, citing the ongoing investigation.

The bust is part of a coordinated crackdown on cartel-linked distribution networks moving meth, heroin, fentanyl, and cocaine into King, Snohomish, and Skagit counties.

Local officials say earlier phases of the enforcement effort targeted a regional distributor believed to be coordinating shipments from the Sinaloa cartel in western Washington.

King County's top drug-detection dog, Quinn, marked the 30th deployment of the year during the operation. Deputies credited the canine unit with playing a central role in locating the concealed drug load.

Law enforcement officials have emphasized that cartel-linked trafficking rings operating in the region transport dangerous substances from Mexico and other points of entry across the United States.

Federal authorities previously announced indictments and dismantling efforts targeting suspected Sinaloa cartel distribution rings in western Washington, where methamphetamine, cocaine, heroin, and fentanyl were found.

Authorities say the broader operation has already yielded hundreds of pounds of illicit drugs seized and multiple arrests, underlining a persistent challenge in disrupting drug supply chains.

The latest action underscores law enforcement's sustained pressure on organized crime networks contributing to drug distribution in the U.S. Officials maintain that such operations aim to reduce the availability of hard drugs and to weaken transnational criminal organizations' foothold in regional markets.

The seizure arrives amid broader national concern over cartel activity and illegal drugs moving into the United States from Mexico and elsewhere.

Federal and local partnerships have been key components in efforts to thwart illicit drug trafficking across state lines and in local jurisdictions.