Seems the state’s eastbound engineers weren’t talking with the westbound engineers on the Nalley Valley interchange in Tacoma.
According to a Tacoma News Tribune story, the Highway 16 off-ramp to Sprague Avenue was built in the wrong spot. When the highway was changed from two lanes to three, engineers needed to shift the off-ramp to make room for the extra lane. But that wasn’t communicated between the design teams and the engineering plan went out with the off-ramp in the wrong place. Contractors followed the plan.
The mistake was caught back in October when the off-ramp was 90 percent completed, but it didn’t come to light until now. Engineers spent the winter redesigning. Last week, the pavement was torn up. A contingency fund will cover the $890,000 to remove pavement, lower the grade and rebuild the offramp.
Nobody will be disciplined, but new safeguards are being put in place so nothing like that happens again, said Kevin Dayton, administrator for the state Department of Transportation’s Olympic Region,