The U.S. Army Corps of Engineers, Portland District, is seeking contractors capable of driving approximately 45 steel piles (18-24 inches in diameter) at various locations along the Columbia River between River Mile 30 and 120. The work includes installing signage atop each pile and providing 20-25 cubic yards of rock scour protection per pile using controlled dumping methods. The in-water work window is from October 1, 2027, to November 30, 2027, with vibratory hammer driving allowed in October and November, and impact hammer driving limited to November only. No budget amount is specified. This is a sources sought notice, not a solicitation, and responses will inform acquisition decisions.