Coastal threatsSea level rise will make Oregon’s existing flooding problems worse

By Kristy Dahl

Published 5 February 2018

The hot spots of sea level rise in the United States tend to be located on the East and Gulf Coasts, where sinking land and changes in ocean circulation are amplifying the global sea level rise rate. But when we take a deeper dive into our interactive maps of chronic flooding due to sea level rise, it’s clear that small but significant areas within many of Oregon’s idyllic coastal towns–Coos Bay and Tillamook, for example–are also at risk of chronic inundation in the coming decades. Because it will take decades for the benefits of emissions reductions to be felt, today’s business owners may not benefit from such reductions themselves. But for the towns of coastal Oregon to continue to be dynamic, thriving places for the next generation of entrepreneurs and residents, the case for building resilience to flooding and reducing carbon emissions is clear.

In 2013 Annie Pollard opened her pub, the 7 Devils Brewing Co., in Coos Bay, Oregon. Less than two years later, the pub flooded during a heavy rain that coincided with a high tide, and Pollard found herself stacking sandbags and mopping up floodwaters. While high tide flooding is relatively infrequent in Coos Bay, when it does occur, businesses like Pollard’s are at risk, and inundated roads cause traffic in town to snarl. Pollard and other business owners are acutely aware that such floods could become a much bigger problem for Coos Bay in the future.

Sea level rise in Oregon
The hot spots of sea level rise in the United States tend to be located on the East and Gulf Coasts, where sinking land and changes in ocean circulation are amplifying the global sea level rise rate. But when we take a deeper dive into our interactive maps of chronic flooding due to sea level rise, it’s clear that small but significant areas within many of Oregon’s idyllic coastal towns–Coos Bay and Tillamook, for example–are also at risk of chronic inundation in the coming decades. And residents of coastal Oregon like Annie Pollard are considering what that means for their homes, businesses, and communities.

Life in coastal Oregon
The Oregon coast is dotted with small towns that contribute to the state’s economy. “A lot of port facilities are right at sea level,” notes Bill Bradbury, the former Secretary of State of Oregon, and they are “definitely part of the economic infrastructure along the coast.” In Tillamook County, in northern Oregon, fertile lands for agriculture sustain, among other businesses, the Tillamook Cheese Factory.

These industries are intimately connected to the water. Regular flooding of Tillamook, for example, helped to make the land as fertile as it is today. And a network of seawalls and other structures have held back the sea since the 1800s in order to maintain the land for agriculture.