Completed in 2002, the South Anker Creek Project was ranked as the 9th highest priority project in Humboldt County under the FCSCP Migration Barrier Inventory (RTA). The culvert shown above not only served as a complete barrier to all life stages of salmonids, but was also extremely undersized. In 1999, the barrier located downstream was removed by Humboldt County. These two projects have opened access to approximately 1.4 miles of salmonid habitat on South Anker Creek.

This project is an example of a type of grade control solution. A total grade differential of 6 feet was attenuated with this installation. There are a toatl of five grade control weirs external to the culvert with a 5% weir-induced grade through the culvert. The design is a further hybrid in that it combines a concrete base with a metal box top.