This is Obi Obi Creek crossing #4, along Obi Obi Road between Kenilworth and Mapleton. The Manuel Hornibrook bridge crosses the creek here, named after Sir Manuel Richard Hornibrook OBE (1893-1970) who was a civil engineer and builder. He was a highly respected builder of bridges across Queensland, New South Wales, Victoria, South Australia and Papua New Guinea as well as other major projects including Stages 2 (the Sails) and 3, of the Sydney Opera House. As one of 7 children of Catherine Hornibrook, Manuel was educated at Nambour, Obi Obi, Bowen Bridge and South Brisbane schools. At the age of 13 Hornibrook commenced apprenticeship with builder HW Fooks. In 1912, at the age of 19, Manuel with his brother Reginald established their own business which started with building drainage channels and sewerage systems. Soon the bridge building became Hornibrook's speciality. For his contribution to the science and the practice of building, he was awarded the Australian Institute of Building's first medal of merit (the AIB Medal, 1955). He was appointed an Officer of the Order of the British Empire (O.B.E.) in 1957 and knighted (as a Knight Bachelor) in 1960. Sir Manuel Hornibrook was the Chief Engineer during construction of the Hornibrook Bridge, between Brighton and Clontarf across Hays Inlet at the the mouth of the South Pine River, which was named after him.
All of this has nothing to do with Obi-Wan Kenobi, Jedi master and instructor of Luke Skywalker and later but actually earlier in time, his father Anakin Skywalker, in the Star Wars original, prequel and sequel trilogies.
Obi Obi is a rural locality in the Sunshine Coast region with a population of 211 people, according to the 2016 census. The name Obi Obi is thought to have derived from the name of a prominent indigenous clan leader, Ubi Ubi or Wubi Wubi.
Back to the cache that you've actually come here for....it is a camo painted container just above head height. There is a track nearby where you can pull off the road which gives access to the creek.