Petaluma River gets its groove back: dredging starts this fall

For the first time in five years, the Petaluma River’s going to get a good, deep clean. Come fall, the U.S. Army Corps of Engineers will be back with their floating vacuum — officially called a cutter-suction dredge — to scoop out years of built-up silt from the downtown Turning Basin all the way down to San Pablo Bay.

This isn’t just a mud-moving exercise. It’s about keeping the river navigable, improving flood flow, and making sure Petaluma’s waterfront stays a place people actually use.

Why dredging matters

If you remember the river before the last dredge in 2020, you remember the jokes about “Duck Island” and the very real problem of boats stuck in the mud. Events like the Lighted Boat Parade were scrapped, visiting yachts stopped coming, and local businesses lost millions in foot traffic.

When the dredge finally showed up in 2020, it hauled out 194,000 cubic yards of muck — plus tires, shopping carts, half-sunken boats, and even a car. Within weeks, the waterfront was buzzing again. The 2025 dredge aims to keep that momentum.

How it’ll work

Work starts in the fall for a reason — by then, salmon and other fish have finished their spawning runs, so there’s less disruption to aquatic life. The dredge will suck up sediment and pump it through big pipes to settling ponds at Shollenberger Park. From there, the mud will be reused to build up wetlands and reinforce levees, turning a maintenance chore into a habitat boost.

The payoff

• Boaters get a safer, deeper channel — no more white-knuckle trips at low tide.
• Industry can keep moving gravel, sand, and other heavy goods by barge instead of clogging roads with trucks.
• Downtown gets the visiting yachts, tall ships, and festival crowds that spend money in shops and restaurants.

The Petaluma Downtown Association calls the river “our heritage,” and city leaders see full docks and packed streets as a key part of economic recovery.

Who’s footing the bill

This year’s $7-plus million project is a three-way split:

• Federal: U.S. Army Corps of Engineers runs the operation.
• State: Coastal Conservancy chips in to make sure the dredged material is used for environmental good.
• Local: City of Petaluma maintains the placement site and adds cash from its own dredging fund.

Rep. Jared Huffman pushed for federal dollars and says the key now is keeping dredging on a four- to five-year cycle.

Looking ahead

Nobody wants another 17-year gap like the one from 2003 to 2020. The city’s exploring partnerships with other North Bay ports to share costs, and tying dredging to wetlands restoration so it qualifies for more funding.

If it works, dredging will become just another part of river life — quietly keeping the channel open so the boats, fish, festivals, and waterfront businesses can thrive.

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