Yes! Several states and several sovereign Indian Tribes have plans for horse slaughter facilities. This is possible because of a recent bill passed by both houses of Congress and signed by the President that would once again allow USDA to provide meat inspectors for horse meat.
Slaughter of horses has never been illegal in the US. It has been illegal in some states under state laws. But, in 2007 Congress pulled all USDA inspectors out of horse slaughter plants so the meat could not be sold. This, in effect, stopped the building of slaughter facilities in states that did not ban it on the state level (like Illinois and Texas).
Animal Rights nuts vow to challenge the new law, but challenges can only be made on the Constitutionality of the law and there is nothing that would allow this low to be over-turned.
If you want to follow the whole process, you can join a group called the United Horsemen. Their website is United Horsemen
Sue Wallis in Wyoming started this as a lobby group that could counter all of the rubbish and rot put out there by the HSUS and PETA.
We have been members since its inception one year ago. Finally, someone is lobbying for the interest of horse people all over America. Until now, we have not had a voice. The result has been a collapse of the horse market and the starvation and neglect of hundreds of thousands of horses -- all caused by their loss of value after the last remaining slaughter plants were closed in the US.