Clanking noise from a grated sewer cover since the spring or 2011. The round cover is located in the SW corner of the intersection of Irving Park Road and N. Pine Grove Ave (see photo). The noise is caused every time an east-bound vehicle rolls over this sewer cover, causing a clanking sound that I can clearly hear from my east-side unit at Lake Park Plaza. 311 was called to report to the Chicago Dept. of Water but no response to date.
NOTE: Though some "adjustment" to the cover was done late summer 2011, the noise level returned within a month of this "repair." Therefore, issue remains the same.