Gretchen Hamel was taken into custody for OWI on October 29.
She was found passed out behind the wheel of her vehicle in the 6100 block of Beachtree Drive at about 10:30 p.m.
The police report says her vehicle had crossed lanes and was up over a curb.
Tests indicate she had a .181 blood alcohol content.
Hamel said she was on the way to her apartment from a friend’s home.
The Des Moines Register reports the Washington D.C. resident resigned the morning after the incident.