Sanjap,
To evaluate if the pole is blocking any signals (and it is - just which ones and how much value they have are the question), you need to have it realigned to the other portions of the arc first so that you can discriminate between whether the pole is blocking your LOS to the satellite and simply the dish not being aligned properly.
Since you say that the pole is approximately where 116W would be. Then try the following:
Set up satellite 105W with TP 11855MHz Vertical polarity (linear) and 3548Ks/S SR.
Scan and see if you can pull in the MACYS TV channel.
Set up satellite 110W with TP 12355MHz Horizontal polarity and 20,000Ks/S. Scan and see if you can pull in the channel D500. This is an "in the clear" test card channel from DN (on the circular side).
111.1W Anik F2, TP 11848MHz Vertical polarity on the linear side, with SR 3270.
Scan for channels "Learn 1", 2 and 3.
113.0W SatMex 6, TP 12079MHz Horizontal polarity on the linear side, SR 25635.
Scan for MACTV.
116.8W SatMex 5, TP 12060MHz Vertical polarity on the linear side, SR 3078.
Scan for Televida Abundante.
119W with TP 12370MHz Vertical polarity and 20,000Ks/S.
Scan and see if you can pull in the NASA channel (on the circular side).
121W with TP 12013MHz Vertical polarity and 20,000 Ks/S.
Scan and see if you can pull in the channel D121. This is another "in the clear" test card channel from DN (on the linear side).
123W G18, TP 11731MHz Horizontal polarity on the linear side, with 13240Ks/S.
Scan for Channel Three VBA (Pentagon).
If you know that your dish and motor are aligned for all other sats on the arc, beyond these that I have listed, then you should be able to evaluate which satellites are being occluded by the power pole. You should at least catch a glimpse of these satellites, if the pole is not blocking them.
I am guessing that 2 - 4 degrees of the arc is going to be completely blocked for sure and up to 6 degrees of the arc will be weakened. Beyond this, you may not notice much of a problem due to the power pole, but it probably is reducing your signal in some extent and the only way you would realize the difference would be to chop down the pole (yeah right

) or relocate your dish mount (

).
RADAR