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At least 22 highway bridges in Washington state sit on hollow concrete columns that are at risk of instantaneous implosion in a major earthquake. The state doesn't know how to fix them. In addition, the state knows of 474 bridges that are at risk of crumbling in a big quake. The state has insufficient funds to fix them. Highways that are part of the Puget Sound region's “seismic lifeline” emergency aid routes were found by KUOW to contain dozens of seismically vulnerable bridges. The state does not publish the totality of its infrastructure needs, in contrast to its seismic cousin California. Until KUOW published a map showing the locations of the endangered bridges, no such public information was available.