Heavy Civil GCCM Services for Black Diamond Trunk Capacity Upgrade

The contract involves providing heavy civil general contractor/construction manager (GC/CM) services for the Black Diamond Trunk Capacity Upgrade project in Washington, aimed at enhancing conveyance capacity and system reliability to prevent overflows and protect public health and the environment. The scope includes preconstruction activities such as managing project meetings, addressing constructability and risk issues, developing cost estimates and construction plans, exploring cost-saving measures, supporting small business participation, and collaborating on logistics, scheduling, and permitting processes. The project is valued between five million and fifteen million dollars, with a focus on ensuring efficient project delivery and system improvements. The solicitation was posted on August 29, 2025, with a response deadline of September 11, 2025. The project is managed by King County, Washington, and falls under NAICS code 236220, which pertains to heavy civil engineering construction. The primary point of contact is Melissa Jordan, who can be reached via email for further inquiries. This contract emphasizes comprehensive preconstruction planning and coordination to facilitate successful project execution, ultimately enhancing infrastructure capacity and environmental safeguards in the region.