| Kerf | |
| Artist: | Thomas Sayre |
| Type: | Sculpture |
| Material: | Concrete |
| Metric Unit: | cm |
| Imperial Unit: | in |
| City: | Portland, Oregon, United States |
| Coordinates: | 45.4627°N -122.6372°W |
| Mapframe: | yes |
| Mapframe-Zoom: | 13 |
Kerf is an outdoor series of two pigmented cast concrete sculptures by Thomas Sayre, installed at the MAX Orange Line's Southeast Tacoma/Johnson Creek station in the southeast Portland, Oregon portion of the Ardenwald-Johnson Creek neighborhood, which straddles the border between Portland (and Multnomah County) and Milwaukie, Oregon (and Clackamas County).
According to TriMet, the pieces were "earth-cast" on site and represent "the influence of wheels on the area, from a 19th-century sawmill on Johnson Creek to the wheels of the MAX train".[1]