There isn't much information available about the Timeship project under Steven Valentine in Texas, but it is speculated that the project failed due to various reasons. One of the reasons could be the lack of funding and support from the government and investors. Another possible reason could be the complexity of the project, as it aimed to create a self-sustaining, time-traveling city that would be able to withstand any kind of disaster. The project may have also faced technical challenges and setbacks, as creating a time machine is not an easy feat. Additionally, the ethical implications of time travel may have also been a factor in the project's failure, as it raises questions about altering the past and the potential consequences that could arise. Ultimately, the failure of the project underscores the difficulty in achieving such a grand and ambitious goal, and serves as a reminder of the importance of careful planning, funding, and collaboration in large-scale projects.