Professional Engineering Services Grosse Ile Bridge Over Trenton Channel

Wayne County is seeking professional engineering consulting services for a comprehensive review and assessment of the Grosse Ile Parkway Bridge over Trenton Channel, a 150-year-old movable bridge serving approximately 22,180 daily vehicles. The project requires a detailed engineering review, historical assessment, alternative bridge solution analysis, cost-benefit analysis, and Planning and Environmental Linkages (PEL) study. Qualified consultants must be Michigan-licensed professional civil engineers, MDOT pre-qualified service vendors, and have key personnel with at least 10 years of comparable bridge design and engineering experience. The procurement will be evaluated using a 100-point scoring system, with 40 points for experience and qualifications, 15 points for work plan and timeline, 25 points for project approach and technical solutions, and 20 points for project cost. Key dates include a pre-proposal conference on 6/24/2025, proposal submission deadline of 7/3/2025, estimated notice of award on 8/18/2025, and a contract start date of 10/17/2025, with an anticipated 18-month timeline for final report submission.

The contract offers potential evaluation credits for County Based Enterprises (up to 7%) and other advantage programs, suggesting opportunities for local and disadvantaged businesses. The project is potentially funded through a U.S. Department of Transportation grant, which will require compliance with Bridge Investment Program Agreement terms. Contractors must maintain comprehensive insurance coverage, including commercial general liability, automobile liability, workers' compensation, and professional liability insurance with specific minimum coverage amounts. While no incumbent vendor is specified, the bridge is currently rated in poor condition with load restrictions, indicating a critical need for comprehensive engineering assessment. Though a specific budget range is not explicitly stated, the detailed price sheet suggests flexibility for consultants to propose costs across six primary tasks: Mobilization, Historical Review, Alternative Bridge Solutions, Cost-Benefit Analysis, Planning & Environmental Linkage Study, and Community Engagement. The contract will be awarded based on the most advantageous proposal that meets the technical and financial requirements.