1. After the humans first make contact with the apes in Muir Woods, Caesar decides on a show of force and arrives at the human compound with hundreds of cohorts, dozens of which are, like Caesar, on horseback. Everyone is surprised to see him, but how do hundreds of primates and dozens of horses cross the Golden Gate Bridge into the city unnoticed? Earlier in the film, a checkpost is shown at the former toll plaza on the southern end of the bridge with plenty of people monitoring it. Throughout the film, smaller groups of 2-3 primates slip onto the peninsula unnoticed by swinging their way across the undercarriage of the bridge, but horses are not capable of doing that. I do concede, however, that maybe the toll plaza was only being monitored while there was a group up north looking for the dam.
Further, the dam is so vital because, as a character claims, the "the city used to run on nuclear power, but that ran out years ago." Okay, a) that's not true- the entirety of San Francisco's municipal energy needs are met by the hydroelectric power plant at Hetch Hetchy reservoir; and b) how does nuclear power run out, exactly? From some rudimentary poking around online, I've learned that world uranium stores are enough for at least another 200 years of nuclear energy at current consumption rates. I've also learned, however, that without regular maintenance and intervention, the water in nuclear power plants' cooling systems will evaporate in a matter of weeks, leading to a core meltdown and a massive, toxic fire. California's last remaining nuclear power plant, Diablo Canyon, is a good 230 + miles south of San Francisco, far enough to be out of the immediate danger zone when an inevitable meltdown happens. Instead of saying the nuclear power 'ran out,' it may be more accurate to say the plant melted down- but considering the timeline within which that would happen (a matter of weeks), it's unlikely the aftermath of the simian flu outbreak would have settled down enough to have a well-organized group of survivors in a centralized location relying on said energy. So, in conclusion, it's most accurate to simply never mention it to begin with.