Laguna de Santa Rosa clogged by litter, debris

  • Jenna Sarmiento with the Sonoma County Youth Ecology Corps remove debris creating an artificial dam along on the Laguna de Santa Rosa on Monday, July 22, 2013. The heaps of debris cause local flooding and make the invasive Ludwigia plant problem worse. (Conner Jay/The Press Democrat)

If you've ever littered in or around the Santa Rosa plain, there is a reasonable chance that the object you threw away is now lodged in one of several garbage-strewn accidental dams clogging up the Laguna de Santa Rosa.

And it's causing serious headaches for nearby landowners, environmentalists, and county water officials.

"Eventually all that garbage that comes out of Santa Rosa, out of Rohnert Park, out of Cotati, that comes down Mark West Creek, winds up here," said Mike Thompson, assistant general manager of the Sonoma County Water Agency, on Monday as he surveyed a series of cleanup sites along the Laguna near Guerneville Road.

Dam Removal


The debris has accumulated over at least three decades in a series of dams along a narrow stretch of the 22-mile Laguna, which eventually drains into the Russian River. There are about 10 separate sites, Thompson said, though their exact sizes and locations are not yet clear.

The blockages appear to have slowed the flow in the channel through the Laguna, leaving stagnant pools where none existed before, perfect breeding grounds for mosquitoes, and allowing for the spread of the invasive weed Ludwigia, which has clogged the waterway in recent years, muscling aside native plants and animals.

The dams also may have changed the drainage patterns on the properties along the Laguna, causing flooding and making the ground a muddy mess far into what should be the summer planting season.

Carlos Soria, manager of Rancho Laguna, said the farm has lost all or part of its 150-acre corn crop to flooding in several recent years, costing the operation up to $300,000 each time.

Moreover, the slow drainage means it is taking progressively longer for the low-lying corn fields to dry out after the rainy season. Where the farm once was able to plant corn in May, it is often now well into June before the crop is in the ground.

Nearby Aggio Dairy lost much of its 70-acre, feed-corn crop to a flood after the rainstorms in June. It's not clear how much the family-run dairy lost, Joe Aggio said, but it will cost a considerable sum to buy feed for the cows elsewhere.

"It's a lot of money," he said. "How are we going to get reimbursed for it?"

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