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<\/a>The birth of the tunnel is linked to the demise of the Alaskan Way Viaduct, and that process has a ways to go yet.\u00a0 Some parts are still standing, while others are completely gone:\u00a0 the effect is like the isolated buttes that persisted during the street regrades a century ago.\u00a0 The legacy section in this first picture survives because of its involvement with the Columbia Street pedestrian walkway from downtown to the ferry docks (which are themselves being made-over, as the seawall recently has been).\u00a0 The land that the remnant stands on did not exist when the Denny Party arrived; it was later made from fill.<\/p>\nBelow is my mid-80s picture of the Viaduct from near the Pike Place Market, heading south toward the unsuspecting Kingdome (itself reduced to rubble in 2000)\u00a0and then veering around to the right:<\/p>\n<\/a>Fill is now the destiny of the viaduct itself.\u00a0 When it was decided that the rubble would be placed in the now-empty Battery Street Tunnel, I imagined that trucks would busy themselves backing in and dumping their loads in the darkness.\u00a0 But no, the choice was made to funnel the debris in from the top.\u00a0 I guess I shouldn’t have been surprised to see those long trucks rumbling by our house.<\/p>\n<\/a>I caught up with one of the trucks between Fourth and Fifth Avenues.\u00a0To the pedestrian, it was always the grates in the sidewalk that marked the underground path of Highway 99 — but the narrower openings in the middle of the roadway are, naturally, where the dust goes in. The truck pulls up next to a big metal quarter-pipe-like trough, a spray of water materializes to suppress airborne particulates, and the hopper of the truck lurches sideways to dump its load into the old tunnel below the street.\u00a0 There’s a video here<\/a> of such a truck dumping its load, a block away between Third and Fourth Avenues.<\/p>\n