Aerial videos showed running water rushing through the home in the area just north of where SR-203 meets NE and 124th Street.
"A 2-foot wall of water with debris in it," said homeowner Bob Siko. "Could have swept my children away."
Siko says he's grateful he, his wife and four boys were not home when the torrent of mud, water and wood came crashing through his property.
"(The water) was 4-5 feet high when it came down," Siko said. "And it definitely could have took my family." The water also flooded a pasture which is used for a local Christmas tree lot.
Siko said the flood should have never happened. He claims he contacted the county last spring expressing concerns about the beaver dam and the huge lake that formed behind it after smaller breaches sent water across his land.
Siko says a county worker came out, inspected the dam, and said he would pass along his report to the Army Corps of Engineers.
"If the county told me it's far too big to be safe seems like maybe the Army Corps of Engineers should have come out and taken a look at that and verified that," Siko said.
A spokesperson for King County Emergency Management says she trying to find out which county department, if any, responded to Siko's complaint.
"They take this very seriously there are people who monitor those for the county," said Lynn Miller. "This one wasn't on the radar it didn't have a level of threat, as I understand it."
Siko says he wants answers eventually, but for now, just wanted to clean up and express gratitude to those helping with the clean up.
"I had friends beat me out here," he said. "By the time I got home, I had people standing here, 'What do you need?' "
Some roads in the area were covered in water after after the dam broke just after 11 a.m. But road crews were able to reopen the roads just before 2:30 p.m.