Heavy machinery work on a Bundaberg creek has environmentalists concerned for the safety of the sea turtles who are frequenting the area for mating season.

The work on the well known turtle nesting site is being criticised as it is taking place during the middle of turtle nesting season. 

Sea Turtle Alliance President Ainsley Gatley says this work will make it difficult for turtles to lay their eggs and for hatchlings to dig to the surface.