The mystery of the broken power poles is solved, or at least Tucson Electric Power believes it knows what happened.
TEP says a power pole near Interstate 10 and Prince Road broke when its anchor failed about 1:30 Monday morning.
TEP says, when the pole at Runway Drive and Gardner Street fell over, it pulled electrical wires attached to other poles.
That's how TEP ended up with six damaged poles, and about 750 customers with no power starting at about 1:30 Monday morning.
A TEP spokesman says it is very rare to have a pole completely fall over when its anchor fails.
Spokesman Joseph Barrios says says usually the pole just leans over and the lines sag.
He says, in this case, the pole that fell had higher voltage transmission lines attached to it from one direction, and lower voltage distribution lines attached from other direction.
Barrios says 21 commercial customers still don't have power and probably won't until sometime Tuesday afternoon.
He says no one was hurt.
Barrios says TEP crews will be working all night and through Tuesday until repairs are completed.
Runway Drive and Gardner Street will remain closed in the area where the crews are working.
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