Evanston spent 27 percent more than predicted on each alderman it sent to the National League of Cities convention in Washington, D.C., last month.
Plans for the conference drew attention after the council was forced to cancel its March 12 regular meeting because a majority of aldermen planned to go to the conference.
In prior years only one to three members of the nine-member City Council had made the trip to the gathering of city officials from around the nation.
City Manager Wally Bobkiewicz had predicted that the event would cost the city about $1,500 for each of the five aldermen who planned to attend.
A summary of expense reports for the event that Bobkiewicz provided Monday to Evanston Now shows the actual cost worked out to an average of $1,917 for each of the four aldermen who actually went to Washington.
Alderman Peter Braithwaite, 2nd Ward, had to cancel out of the trip at the last minute because of a family emergency. That cost the city a $75 conference registration cancellation fee and $342.60 for an airline ticket that can be used for a later trip.
The highest expense reimbursement reported for the event was $2,360 for Alderman Coleen Burrus, 9th Ward.
But Burrus spent five days in Washington, while the other aldermen were only there for four. She also picked up most of the tab for meals the aldermen shared during the conference.
Expenses reported by the other aldermen on the trip didn't differ by much. Aldermen Jane Grover, 7th Ward, spent $1,811. Alderman Mark Tendam, 6th Ward, spent $1,747 and Alderman Melissa Wynne, 3rd Ward, spent $1,751.
The aldermen defend the cost of the trip based on what they're able to learn from conference sessions and the opportunity it provides to meet with federal officials about city issues.
The aldermen and city staff produced a nine-page report summarizing what they took away from conference sessions.