, a recent finding by the Park Service has determined that a proposed arch would have negative effects on historic sites. The number of sites affected is substantial, with dozens impacted by the arch's construction. The types of sites that would be adversely affected include major buildings and districts, as well as notable landscapes.

Further information on this development can be found through KTSM 9 News, which has reported on the Park Service's finding. Details on the specific sites and the nature of the adverse effects are available from the source, providing a more comprehensive understanding of the situation and its implications for historic sites in the area.