PROJECT ALERT NOTICE (OR) High Water NW Oregon

Date: Sat, 05 Nov 2022 11:21:50 EDT

Summary: High Water Northwest Oregon, some weekend work is planned

Parts of NW Oregon have received 3-6+ inches of rain over the last 24 hours pushing several sites near or above minor flood stage. The main rain event was last night and today. Coastal Rivers and Willamette Basin Rivers are the most impacted, with three streamflow gages current at or above the flood stage.

Following the current precipitation event, there is a forecast for a significant cold weather event to last through at least the end of the coming.

Currently (11/15 am), there are plans for two crews to be out-measuring the high-flow conditions at several sites today, but additional crews (2) are also active with WQ samples in post-wildfire monitoring sites located on the Santiam and McKenzie Rivers. A team is also out for event sediment sampling on the Lower Columbia River, and depending on conditions, they may also sample Sunday.

No down sites, but USGS database staff and Portland Field Office Chief have communicated with local NWS staff and the emergency Duty officer for Clackamas County Disaster Management about concerns with data at one location - discrepancy between NWS and USGS data. That issue was addressed last night, but a verification site visit is being planned for today.