Posted coordinates are bogus! There is no container in the middle of the river so no need to get wet.
This is a Bonus Cache for the Mennonite Settler Adventure Lab. Posted coordinates are near the start of the Adventure Lab.
The final coordinates are obtained in the Advenure Lab.
The final is at N 38 02.ABC W 097 21.DEF
We gave this a Difficulty of 2.5 because it is a field puzzle.
TOTT may be helpful in retrieving log from container.
Log only so BYOP