Department of Defense PSC Z1KF contractors in Washington

MAINTENANCE OF DREDGING FACILITIES. Use this deeper state-buyer-PSC page to see which visible contractors sit closest to this exact overlap in the public AwardRegistry layer.

Washington + Department of Defense

Last updated: April 7, 2026

Visible recipients

Mapped obligations

$476,654,828

Visible recipients tied to Department of Defense, Washington, and PSC Z1KF

Manson Construction CO

Seattle, WA

Manson Construction CO is a federal category business profile based in Seattle, WA. The current public data layer shows $223,706,344 in visible federal obligations across 86 awards or transactions. Department of Defense appears as the strongest visible awarding agency. Top industry concentration is in NAICS 237990 (Other Heavy and Civil Engineering Construction). The profile also shows meaningful product and service activity in PSC Y1KF.

$476,654,828