Boundary monument 19B?
Canada /
British Columbia /
Fort Langley /
World
/ Canada
/ British Columbia
/ Fort Langley
benchmark (survey), boundary marker

As per standard practice there are two boundary monuments straddling the road at this border crossing; neither matches the listed location of Monument 19A. If standard numbering is used, they should be 19A and 19B, or 19A-YY and 19B-YY to denote the year they were adjusted.
www.internationalboundarycommission.org/coordinates/49thParallel.htm
www.internationalboundarycommission.org/coordinates/49thParallel.htm
Wikipedia article: http://en.wikipedia.org/wiki/Canada–United_States_border
Nearby cities:
Coordinates: 49°0'8"N 122°29'5"W
- Boundary monument 58 70 km
- East Sooke Regional Park Pike Road parking lot 115 km
- Boundary monument 106 193 km
- British Columbia–Idaho–Washington tripoint (BCIDWA) 398 km
- Boundary monument 207 437 km
- Boundary monument 211 450 km
- Boundary monument 219 463 km
- Boundary monument 220 465 km
- Boundary monument 221 469 km
- Mount King Edward 496 km
- Aldergrove Park 2.1 km
- Homestead Golf Course 5.2 km
- Berthusen Park 5.2 km
- Northwest Washington Fairgrounds 7.3 km
- Abbotsford International Airport 9 km
- Runway 07/25 9 km
- Laxton Lake 10 km
- Judson lake 10 km
- 0 (zero) Avenue 10 km
- Langley, British Columbia 13 km