Despite the denial of the key permit, Dakota Access LLC has indicated its intention to continue advancing the pipeline project. Legal options that the company could pursue include:

1. Court Challenges: Dakota Access LLC could challenge the permit denial in court. The company may argue that the decision is arbitrary, capricious, or in violation of applicable laws and regulations. Legal challenges could involve filing lawsuits in federal or state courts.

2. Alternative Permitting Paths: The company may explore alternative permitting options or potential variations to the proposed route. This could involve seeking permits from different agencies or authorities or pursuing approval under different laws or regulations.

3. Negotiations and Agreements: Dakota Access LLC could engage in negotiations with relevant stakeholders, including landowners, Native American tribes, and government agencies, to find mutually acceptable solutions or agreements that could facilitate the pipeline project.

4. Political and Public Pressure: The company may also seek to generate political and public support for the pipeline project, potentially lobbying for favorable policies or seeking intervention from elected officials or agencies.

5. Potential for Delays: Any legal challenges or alternative permitting paths could lead to significant delays in the project's timeline, as these processes can be lengthy and complex.

It's important to note that the ongoing dispute surrounding the Dakota Access pipeline involves multiple legal, environmental, and political factors, and the exact course of action taken by the company and other parties involved is subject to change based on future developments.