"trying to add a city phase 1 4 sites" Well that narrows it down. Manchester or Nashua? Both of those are ASTRO 25 systems, so you enter the bandplan into the Harris just as it is on either system. They happen to use the same bandplan, which is the "not always 100% the same for all ASTRO 25 systems, but usually the same for most of their 700/800 systems" as Kevin mentioned.
Premium subscribers can see bandplans if they are added to the database. Both of these systems have the bandplans noted in the sites details. Hint: ASTRO 25 channel table (bandplan) starts at 1, most others start at 0.