Map of major cities along the Pugest Sound with two of the larger Girl Scout camps - Camp River Ranch and Camp Robbinswold - highlighted. While there will be an overview of all Girl Scouts of Western Washington's camps, there will be a focus on River Ranch and Robbinwold.
An Introduction to Girl Scout Camps in Western Washington
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The Probability of Geologic Disasters at Camps River Ranch and Robbinswold
This map focuses on the chance of liquefaction and tsunami hazards for Camp River Ranch and Camp Robbinswold. Liquefaction is when a solid material becomes liquid. This can happen to the Earth when there is soil that is loosely packed and waterlogged. If that soil gets shaken, for example in an earthquake, it can become liquid and cause landslides and structure failures. Liquefaction probabilities are higher in logging areas and areas along rivers. The Hood Canal would be at risk for tsunami waves if a large enough tsunami-triggering event were to happen. The tsunami hazard data was constructed off of the Cascadia Magnitude 9.0 earthquake scenario. It is also important to note that both areas fall into a D-1 seismic class. This means that if a large enough earthquake were to strike there would likely be considerable damage to any of the structures located on the camps.
Map of Historic Earthquakes and Landslides Near Camp River Ranch
The previous map, and any following interactive maps, show historic earthquakes, landslides, wildfires, and a couple of data points that explain the damage that happened to an area after a major earthquake.
The legend can be found in the bottom left corner of all maps. If you feel like exploring the area, but want to come back to the highlighted camp, click the home button in the bottom right corner above the zoom options. To the left of that you can see a locator map to better understand where in North America the map highlights. If you want to see the map in full screen, look to the top right corner of the map frame.
All earthquakes that are recorded are over Magnitude 1. You can click on the symbols to learn more about the magnitude, depth, and date of the earthquake. The earthquakes are separated into two data sets. One is any earthquakes before 2013, while the other is earthquakes from 2013-present.
Map of Historic Earthquakes, Landslides, and Wildfires near Camp Robbinswold
The Probability of Wildfires and Flooding at Camps River Ranch and Robbinswold
This map focuses on the chance of wildfires and flooding for Camp River Ranch and Camp Robbinswold. It is good to note that if the Tolt River dam were to fail, the meeting place for residents of Carnation, would be at the highest point in Camp River Ranch. Resident's would have approximately twenty minutes to get there. A dam test alarm can be heard every Wednesday around 1PM during the summer. While there wasn't direct flood information for the Hood Canal, there was information for the Skokomish River which is a major river leading into the Hood Canal and is located approximately 17.6 miles south of Camp Robbinswold.
This chart shows all times the Tolt and Skokomish River have flooded since 2013. Action Stage floods are not included in the chart.
This chart shows the amount of times each flood stage has been recorded in the past decade for the Tolt and Skokomish Rivers. Flood stages for the North Fork of the Tolt River, near Carnation are Action Stage: 8.4 feet (not included in chart), Minor Flood: 9.4 feet, Moderate Flood: 10.4 feet, and Major Flood: 10.9 feet. Flood stages for the Skokomish River, near Potlach are Action Stage: 15 feet (not included in chart), Minor Flood: 16.5 feet, Moderate Flood: 17.5 feet, and Major Flood: 18 feet. The only major flood that has occurred at the Skokomish River in the last decade was recorded on December 5th, 2023.
