The Delaware Superior Court recently upheld a permit granted to Diamond State Port Corporation for the expansion of the Port of Wilmington. This decision affects local businesses and environmental advocates who raised concerns about the project's potential impact on recreational fishing and navigation in the Delaware River. The ruling is significant as it reinforces the authority of state agencies to approve large-scale development projects while balancing environmental considerations.

The case, Greenwich Terminals LLC v. DNREC, was filed under docket numbers N25A-08-003 KMM and N25A-08-001 KMM. The court's decision, issued on September 23, 2026, came after a lengthy appeals process involving multiple parties, including Greenwich Terminals LLC, Gloucester Terminals LLC, GMT Realty, LLC, and individual appellant Walter F. Curran.

The dispute began when Diamond State applied for a permit from the Department of Natural Resources and Environmental Control (DNREC) to expand the Port of Wilmington to the site of a former DuPont facility. The project, which involves significant dredging and construction, aims to accommodate larger ships and enhance the port's capacity. However, local stakeholders, including Curran and Greenwich, objected to the project, citing concerns about its impact on navigation and recreational fishing.

Following DNREC's approval of the permit, Greenwich and Curran appealed to the Environmental Appeals Board, which upheld the decision. The objectors then took their case to the Superior Court, arguing that the Board had committed legal errors and failed to adequately consider their evidence.

In its ruling, the court affirmed the Environmental Appeals Board's decision, stating, "The Board did not commit legal error, credibility determinations and weighing the evidence lies with the Board, and its rulings are supported by substantial evidence." The opinion was authored by Judge Miller, who emphasized that the objectors did not meet their burden of proof in challenging the Board's findings.

The court's ruling noted that the Board had thoroughly evaluated the evidence presented by both sides, including expert testimonies regarding the project's potential environmental impacts. The Board found that DNREC had satisfied regulatory requirements and that the project would not significantly harm recreational fishing or navigation in the Delaware River.

The decision is poised to have lasting implications for future development projects in Delaware. It underscores the importance of balancing economic development with environmental protection and affirms the authority of state agencies to make permitting decisions based on expert analysis and public input. The ruling may also set a precedent for how similar disputes are handled in the future, particularly in cases involving large-scale infrastructure projects.

As the project moves forward, it will be closely monitored by both supporters and opponents. Supporters argue that the expansion will create thousands of jobs and generate significant economic benefits for Delaware. Conversely, opponents remain concerned about the long-term environmental impacts and the adequacy of mitigation measures.

Looking ahead, it is unclear whether the objectors will seek to appeal the Superior Court's decision. They may consider further legal action or continue to advocate for stronger environmental protections as the project progresses. Meanwhile, Diamond State Port Corporation is expected to proceed with its plans to expand the Port of Wilmington, which could transform the region's shipping capabilities and economic landscape.