Write a concise narrative tracing the Lake Washington crossing from conception to opening, highlighting the political battles, budgeting hurdles, and engineering feats that shaped it. Use a guiding metaphor (e.g., stitching or bridging worlds) to weave together planners, engineers, voters, and commuters. Include at least one concrete turning point (a veto, a court ruling, a cost overrun, or a breakthrough in floating-bridge technology) and explain its impact on the timeline. End with a forward-looking reflection on how this half-century journey reshapes regional mobility and identity.