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model proposed 2026-09-03 · water, rivers, cities

The Lagoon at Ross Island

Four of the past five summers have brought toxic cyanobacteria blooms to the Willamette in Portland. Researchers say the cause is a man-made lagoon, 120 feet deep from a century of gravel mining, and that restoring the river's flow through it is the fix. What would it take, and who pays?

by orbital