Proposal may alleviate flooding at base of Hollywood Hill
Undersized culverts and a near 90-degree turn in the stream channel are said to be the culprits further aggravating flooding problems on 148th Avenue NE at the bottom of Hollywood Hill near the Hollywood Schoolhouse.
King County Surface Water Management has issued a determination of nonsignificance on a proposed drainage improvement project which would remove the 90-degree turn in the channel behind the schoolhouse, replace 300 feet of culvert along 148th Avenue NE, and upgrade the culvert under 148th Avenue NE.
The project would also place large rocks, logs, and rootwads in the stream channel in the upper ravine to reduce water velocity, stabilizing eroding streambanks and trapping sediment. Also, boulders would be placed near the 15010 NE 146th Place driveway, and the streambank there would be revegetated.
Comments to SWM on the determination must be received by May 3.