©Jeffrey S. Juel 2013 The Chinook River Bridge Tide Gates and The Indisputable and Inconvenient Truth about Sea Level Rise By Jeffrey S. Juel, PE (Civil Engineer) Abstract: This paper discusses the bridge and the tide gates located where Highway 101 crosses over the Chinook River in SW Washington State. The bridge and the approaches to the bridge were designed to be just a few feet higher than the highest tides. The designer signed the final drawings in March of 1926. This was a more than a half century before anyone in the state of Washington started thinking about Global Warming and Sea Level Rise. The Chinook River’s estuary has been severely degraded by the operation of these tide gates. The State of Washington has spent hundreds of thousands of dollars tinkering with a fundamentally-flawed tide gate design that was installed there (regrettably with my help) in 2008. Everyone knows that Global Warming is causing the polar ice caps to melt. The science is settled. If sea level rise is really happening, the bridge and the approaches at the Chinook River will have to be raised in the near future. Why not simply deny permits to the Department of Transportation and wait for the rising sea level to wash-out the bridge and the approaches? When the lowlands of the estuary are flooded by sea level rise, the state will not need to do anything or buy any property. The estuary will be restored to full tidal exchange for free. Due to sea level rise, the Chinook River estuary and the surrounding wetlands will be bigger and better than ever! (… or not.) Keywords: Chinook River; Tide Gate; Global Warming; Al Gore; Charlatan; Sea Level Rise; Hoax; The Highway 101 Bridge over the Chinook River The Chinook River and its 12 square mile watershed are located in SW Washington State. The mouth of the river is 3.5 miles east of the town of Ilwaco on the north shore of the Columbia River Estuary.