For 70 years, a concrete barrier sealed off Alameda Creek in California from the bay. The water behind it was widely considered lifeless, with no salmon or steelhead returning to spawn. In the fall
For 70 years, a concrete barrier sealed off Alameda Creek in California from the bay. The water behind it was widely considered lifeless, with no salmon or steelhead returning to spawn. In the fall of 2025, work crews finally removed that barrier, and within days, two Chinook salmon were observed swimming upstream through water that had been inaccessible to them since before the first moon landing…
California pulled a concrete wall from a dead creek, and what happened to the salmon stunned biologists. The barrier had blocked the waterway for decades, leaving the stretch virtually lifeless.
For seventy years, a concrete barrier blocked Alameda Creek in California, and the water behind it was widely considered lifeless. In the fall of 2025, work crews finally removed that wall. Within days, two Chinook salmon were swimming upstream through water that had been inaccessible since before the first moon landing.The fish were not placed there by humans, and no one guided them to the creek….