You can see plenty of phone/power wires coming off of the poles, but you cannot see any wires strung between that small forest of insulators at the top of each pole.
That might suggest a particular upgrade project, and therefor date the card.http://www.altuschamber.com/
... The Altus Chamber of Commerce might know
Or, you could work your way down from:http://www.wfec.com/about-wfec/member-co-ops
... Western Farmers Electric Cooperative (WFEC), one of whose twenty-odd members serves Altus AFB
/s/ ikeyPikey (who has had some luck eMailing a postcard to the locals and asking for a date range)