Oh Man islandbreeze, I wish I knew that you were going. There are a few of them left. They are on the south side of the building in a sunked landscaped area. The one's along the east side of the building have been removed a few years ago. I will check the next time I am out there. I believe they left a few of them in place. I wouldn't expect the staff to know what they are. They are narrow single trunked one's that almost crawl along the ground. They have been a fixture at this library for years and very few people ever noticed them. My sister in law thought that they were some kind of yucca, but they had too large of a crown and very pointing narrow (yucca like) leaves that almost resemble a Joshua Tree. There are several in Windsor, and they are the needle palm type and seem to do very well. My wife's aunt live along Riverside Drive and we have seen several homes with them planted.

While they too took a while to arrive due to fabrication template and specs of measurements, my WindowWell Experts covers came and are just as they were advertised. All four clear acrylic well covers fit the well precisely (we got the minimal slope covers) and clip on to the well edge, leaving a very small air gap for breathing below. They are very clear, something I notice each morning when picking up the paper. It's an aesthetic component I like. Sure enough, the night they were put on they got their first trial: heavy, heavy ran during the night. They worked perfectly in keeping the water out of the house crawl space. While the wait was long, they are worth it: durable, sharp looking, easy to install, and fit into the landscape. I have no hesitance in recommending them. This post was edited by SparklingWater on Fri, Feb 15, 13 at 17:48

I am considering buiding a wooden frame on which I will attach cut plexiglass with hinges. Any ideas on how to produce the semicircle frame to fit the window well with a 5 to one slope to allow the plexiglass to shed water?

Most everything out there is going to be intended for egress and therefore much deeper projection from the building. I don't know of anything to recommended to you to meet those shape criteria as pictured. Rockwell does make a pretty well but it is an egress compliant design.