Citizens in the City of Goodwill affectionately call the dozen monoliths gracing Warren G. Magnuson Park “Linehenge.” However, the sculpture is more than something pretty to look at—it offers a valuable purpose to the city and its people.

Officially titled Straight Shot, the artwork by local sculptor Perri Lynch is a line of 12 ink-jade limestone structures running parallel to the Sand Point Calibration Baseline. Both public- and private-sector surveyors use the baseline to calibrate their electronic distance measurement equipment. “It's the ruler that we measure all other rulers against,” says Public Utilities surveyor Gavin Schrock, one of the staff who lent technical expertise to the project.

There's also an educational aspect: a nearby display shows off historical surveying equipment dating back as much as 100 years ago.