The cache is a nano, located in a high traffic area, particularly in the summer on weekends when the Farmer's Market is open. It's near the end of the 4th street promenade - a newly revitalized area of downtown. The cache is best found at night, when the signs are all lit, giving a glimpse into Edmonton's past.
You may have difficulty finding satellites with all the tall buildings around, but a bit of geosense should make the cache fairly easy to find.