But both wharves, along with the nearby piers for both the nation's ballistic missile and Seawolf-class submarines, would see waves in excess of 20 feet, the new research shows. The Navy built the new wharf in the past decade because it said an existing wharf couldn't keep up with the loading and unloading of ballistic missiles on the Navy's eight Bangor-based Trident submarines. That report was released to activist Glen Milner of the anti-nuclear weapons group Ground Zero Center for Nonviolent Action, which had sued the Navy over safety concerns at the new wharf and its location. For instance, a 2018 analysis conducted by the Navy at the completion of construction of a missile-loading wharf concluded tsunamis from a Cascadia quake would have little consequence. The new research by the state's Department of Natural Resources, in conjunction with federal agencies and the University of Washington, is the most complete analysis of a Cascadia subduction zone-caused tsunami ever undertaken for the Puget Sound region. It also is at odds with prior research of the risk to Kitsap's waterfront areas, including its naval installations in Bremerton and at Bangor. "As we look at it, this is the most likely worst-case scenario," according to Corina Allen, the state's chief hazards geologist and a co-author of the study, mapping and modeling project. Other lowland areas of Puget Sound, particularly near the mouths of streams including Clear Creek in Silverdale and within Eagle Harbor on Bainbridge Island, would flood as well. In Sinclair Inlet, the waves would be smaller, the state says, but would still inundate the Puget Sound Naval Shipyard with about a foot of water and likely push more than 3 1/2 feet of water through Gorst, closing the highway. In Hood Canal, the 9.0 quake in the Cascadia Subduction Zone off Washington's coast would slosh water back and forth like in a bathtub, topping the Navy's submarine piers and pushing waves as high as 14 feet onto the shore at Belfair. BANGOR - A powerful and incessant tsunami generated by the next Cascadia megaquake would crest Navy piers and wharves, flood critical state highways in Kitsap County and inundate other lowland areas of Puget Sound, according to new modeling released Tuesday by the state's Department of Natural Resources.
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