MontanaPBS is just $20,000 away from its $1.3 million goal for an over-the-air broadcast tower for viewers in the Great Falls area, reports the Great Falls Tribune. Currently, Great Falls may be the largest American city without an over-the-air PBS signal. Sally Newhall, co-chair of the “Tower to the People” fundraising effort, said the project has a construction deadline of the end of the year, and an October 2010 deadline to match a $75,000 Murdoch Foundation grant. “I feel really positive about it,” Newhall added.