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Wastewater advisory in Lake Oswego
Some wastewater may have entered Oswego Lake and the Willamette River this morning.
As a precaution, city officials are advising the public to avoid contact with water in Oswego Lake and downstream water in the Willamette River for 72 hours following the spills. The two unrelated wastewater overflows took place this morning, so the advisory will remain in effect through Saturday morning.
City of Lake Oswego Public Works Department personnel responded to reports of sanitary sewer overflow incidents on Wednesday. The first overflow was called in at 7:35 a.m. and was contained at 8:12 a.m. today at 1305 Green Tree Road and Weidman Court. The amount of spilled wastewater is estimated at 3,700 gallons. The city is investigating the cause of the incident.
The second overflow, at 16510 Old River Road near Marylhurst University, first was reported as a water leak at 9:14 a.m. today. A power outage at the Marylhurst Sanitary Sewer Pump Station caused the overflow, and power was restored at 11:10 a.m. The spilled wastewater is estimated to be 24,800 gallons.
The City notified the Oregon Department of Environmental Quality and is coordinating remediation efforts with them, the press release said.