As the world celebrates Earth Day 2021, local experts warn the historic Arcata dikes holding back Humboldt Bay will be overtopped monthly, possibly in as soon as 30 years, due to rising sea level from climate change. 
"There is no stopping sea level rise for the next century or next couple of centuries," said Aldaron Laird, an environmental planner specializing in local sea level rise who is currently working with Greenway Partners on several local projects. "It's just going to keep right on going."

Wiyot Tribe Natural Resource Specialist Adam Canter said Arcata has a site on McDaniel Slough that is at risk — one of 52 Indigenous cultural sites around Humboldt Bay that could be inundated in the coming decades.

Jennifer Kalt, director of Humboldt Baykeeper, identified three sites in Arcata that are at risk of tidal inundation in the coming decades that have tested positive for dioxin contamination: one on Janes Creek, another on Butchers Slough and the former Little Lakes Industries site off I Street near the Arcata Marsh and Wildlife Sanctuary. 
Last year the Arcata City Council voted to submit an application for a federal assessment grant of $300,000 for the same property and received the grant earlier this year.Last year the Arcata City Council voted to submit an application for a federal assessment grant of $300,000 for the same property and received the grant earlier this year.
Arcata Community Development Director David Loya said he is hopeful that the city will get the cleanup grant and the cleanup will begin as early as this fall, but he anticipates next summer is more likely.
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