Clark County Landslide Risk To Be Studied Thanks to Federal Grant

Clark County Landslide Risk To Be Studied Thanks to Federal Grant

Geological Survey awarded $299,250 to survey portions of Clark County for landslide threats; Grant was made possible by the Cantwell-authored National Landslide Preparedness Act

WASHINGTON, D.C. - Today, U.S. Senator Maria Cantwell (D-WA) announced that the Washington Geological Survey had been awarded $299,250 to conduct a landslide inventory along State Route 14 in Clark County. The grants were awarded by the United States Geological Survey (USGS) under the Cantwell-coauthored National Landslide Preparedness Act.

Washington is one of the most landslide-prone states in the country, and landslides in the Columbia River Gorge have the potential to block or destroy State Route 14, which runs along the Columbia River and connects communities and businesses in central and eastern Washington to southwest Washington. Landslide inventories are conducted by state and federal agencies to gather data about where landslides have occurred in the past, which can then be used to understand which areas are most susceptible in the future. This knowledge allows planners to avoid activities that can trigger landslides and helps emergency services prepare and better respond to their occurrence.

The National Landslide Preparedness Act, which directed the USGS to award grants such as the one announced today, was introduced in 2020 by Sen. Cantwell and Representative Suzan DelBene (D, WA-01), and became law in 2021. The information collected under the Act helps communities plan for and respond to natural hazards, update the nation's topographical maps, and inform public safety, national security, planning, infrastructure, transportation, agriculture, and natural resource management.

Last week, the USGS released a new, highly detailed map which shows that nearly 44% of the country could experience landslide activity. The map, which USGS creates regularly as a result of the 3D Elevation Program in the National Landslide Preparedness Act, shows that a significant area of Washington state is susceptible to landslide activity. The new map expands the scope of assessment to include the entire country, using much higher resolution data than was previously available.

In February, Sen. Cantwell joined U.S. Senator Lisa Murkowski (R-AK) in introducing a bill to reauthorize and expand the National Landslide Preparedness Act for 10 years, through Fiscal Year 2034.

Fatal landslides in Washington and Alaska have highlighted the urgent need to better understand and prepare for landslide hazards. The 2014 landslide near Oso, Washington took the lives of 43 people and devastated a community in about two minutes, and a number of recent landslides in Southeast Alaska have killed 12 people - including in Ketchikan last month, in Wrangell in November 2023, and in Haines in December 2020, among others. Landslides kill 25 to 50 people and cause between $1.6 billion and $3.2 billion in damage in the U.S. annually, according to the U.S. Geological Service and National Research Council. These statistics are expected to worsen because of climate change.