How do I get a coordinated frequency pair assigned for my repeater

How do I get a coordinated frequency pair assigned for my repeater.

I am thinking about putting up a 70cm repeater up on my High School, where they have a very tall roof.

By the time It is ready to put it up, I want to make sure a frequency pair is reserved for the repeater.

Who do I contact / where can I get a frequency coordinated for the repeater?

That may require some effort by your club to check all the coordinated repeaters to see which are still up and running. It is not unusual to see repeaters still registered long after they have gone of the air. If that is the case you should be able to register that previously used frequency pair for your club repeater (attempt to contact the registered owner of the former repeater to see whether it is permanently gone or just off the air for maintenance/repairs).

Even if all the repeaters in the region are still operational (just not used very much), you may still be able to get coordination for your club repeater but it will take more effort. You need to plot the reach of your planned repeater (coverage maps) and then show that it doesn't overlap with any other repeaters sharing the same frequency pair you are applying for.
Your regional repeater coordination group should have guidelines for that process (which may involve running your repeater uncoordinated for some period and checking for interference reports).
http://www.dslreports.com/forum/r30020018-FM-repeater-activity-in-your-area

Canada there are coordinators assigned by the RAC (Radio Amateurs of Canada, equivalent to your ARRL), but they are really just a recommendation/suggestion. They are not assigned by Industry Canada (FCC equivalent) and there is no regulation/law that says you have to follow them.

That being said, we have nowhere near the same population density as some of the major US cities so frequency coordination is much less of a problem and in many areas there is pretty much just one or two repeaters within range of each other usually sponsored by a single club.

While it's nice that there aren't enough amateurs in most areas to cause band congestion, it's also unfortunate that there aren't more active amateurs around.

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Here is a state list of U.S. frequency coordinators from the NFCC. Just select your particular state or U.S territory.Contact the CCARC.net folks - they run the repeater coordination here in Colorado. That said, my understanding is that there are no available allocations in either the 2m or 440 bands, except for some room for digital (MotoTRBO or DSTAR) modes. That said, reach out to them, their web page lists http://www.ccarc.net/wordpress/coordination-support/ as the place to go to request a coordination.

And since TASMA is the local frequency coordinator, you must work with them. Around here we have WNYSORC (pronounced "winnie-sork" ) which covers both sides of the border.



As for antenna and reach, location is probably even more important then in real estate
In our ARES group we have one repeater for city wide communication and another repeater that is covering the entire county (and is used by County ARES/RACES for that purpose). The repeaters are of comparable power but one is at low elevation and the other on the top of a peak.

Western New York - Southern Ontario Repeater Council
http://www.wnysorc.org/coord_faq.php