This BM is in the foundation wall of the west side of the Osoyoos Post Office on 78th Avenue, one block north of Highway 3. It's been painted gray along with the rest of the wall but is still quite easy to spot. As a bonus, there's a gravity net station tablet below it.
From
NRCAN:
Osoyoos
Post office near corner of 85 street and 78 avenue, tablet in west sidewall, 4.9 m from southwest corner, 24 cm below cinder block siding.
NTS map sheet - 082E03
Unique Number - 75C505
Marker Type - Permanent agency marker
Inspected in- 1998
Established by - Geodetic survey division - nrcan
Status - Good