I found a Commemorative QLD Permanent Survey Mark (PSM). It commemorates 150 years of surveying as part of Queensland’s 150 year birthday celebrations. The Survey and Spatial Sciences Institute (SSSI) has installed 60 permanent benchmarks across Queensland allowing the public to check the accuracy of GPS units and growing awareness of the science of surveying. There is an information board next to this mark.

Q150 Commemorative Plaque
Number: 172925
Name: Q150 Logan River
Installed: 01 October 2009
D1 / T1

Thanks for the cache

Rated: for Overall Experience.