Do all the other Steady Ed designed courses feature asphalt around the baskets? The courses he designed for the Hamilton County Oh park district all have the asphalt around the basket, it's a bit goofy.
Guarantee the asphalt was a park add-on to combat erosion around the baskets. I've seen courses half as old as the Steady Ed designs where the sleeves are exposed up to a foot below the collar, when they started with the collar more or less flush with the ground. Asphalt at least delays that effect, and is probably more cost effective than trucking in dirt and/or wood chips every couple years to fill the area instead.
Oldest Steady Ed course I've played is Beaver Brook Campground. The current owners, who weren't the owners when the course was installed, claim they were told by Ed himself that the course was somewhere between the 3rd and 10th course he designed and installed. His record keeping was notoriously bad, but apparently the first ten after Oak Grove were a part of one big trip around the country for Ed and he remembered Beaver Brook being one of his stops.