The Spillway Deflector project was a modification to Spillway #1 & #8 at Little Goose Dam in Walla Walla, Washington. The contract involved the installation of two spillway deflectors, two pier nose extensions, and the installation of a new trash boom frame. Installation of the spillway deflectors required the fabrication and installation of a 30-foot tall by 70-foot long bulkhead to the dewater spillway. AAC partnered with Jesse Engineering of Tacoma, Washington to build the bulkhead.

The in-water work window for this project was November 1, 2008 through March 1, 2009.