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If an earthquake breaks the dam ...

... Where will all the water go?

Find out at an informational session on the potential impacts of earthquake-related flooding from Hagg Lake if Scoggins Dam breaks.

Representatives from the federal Bureau of Reclamation and other agencies will speak and answer questions Thursday, Jan. 9, at 1 p.m. in Hillsboro at the Civic Center Auditorium, 150 E. Main St., and at 6 p.m. in Forest Grove in the Community Auditorium, 1915 Main St.

For the first time, dam experts will share maps showing potential flood zones in the case of a dam breach. The maps will not be available for public viewing outside the meetings.

Located near Gaston, Scoggins Dam was built in 1975. It blocks Scoggins Creek and creates Henry Hagg Lake, which stores water for a number of entities, including the Tualatin Valley Irrigation District, the cities of Beaverton, Hillsboro and Forest Grove, Clean Water Services and the Lake Oswego Corporation, a homeowners organization tied to Oswego Lake but not the city of Lake Oswego.

Releases from Henry Hagg Lake flow down Scoggins Creek and eventually into the Tualatin River, which runs through Cornelius and Hillsboro, all the way through Lake Oswego to reach the Willamette River in West Linn.

While agencies are hoping to raise the dam to store more water, it also needs to be strengthened to better withstand a potential earthquake.

For more information, contact This email address is being protected from spambots. You need JavaScript enabled to view it. or visit 1.usa.gov/1dibOT6, ready.gov/floods, floodsmart.gov and damsafety.org.




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