Okay, let’s tackle this. So Art Huckelbridge has 46 years of experience as a Professor Emeritus of Civil Engineering. While his experience is extensive, it's in academia rather than industry. Design skills are valuable, but the rate may be lower due to the non-profit nature of a university. Location is Cleveland, Ohio, which is a relatively affordable market. Considering his experience and skills, a rate of $100 per hour seems reasonable, on the lower end of the scale for a designer with his background.