At that distance you should be able to get a reasonable guess.
Fibre cabinet to PCP (original cabinet) +2m + distance underground to pole (Just look at the line of poles to get a good estimate of route), + 7m to get to the top of the pole, +drop wire to house + 2m (catenary) + internal routing to master.
At around 1300 feet you are at the point where performance will start to tail off but certainly an excellent result. Mine is around 450-480m and I am down at around 65Mb potential.
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