I took a photo as it seemed an interesting design. Wondering what the symbols were, I began to do some research. Incredibly, I was not the first person to take notice of a manhole cover! 😊 There was even an exhibition in 1996 on the subject in the public courtyard of the Wadsworth Atheneum. It was in counterpoint to the exhibition inside about Samuel Colt, inventor of the Colt 45. As a statement on gun violence, artist Bradley McCallum melted down 11,194 guns confiscated by Connecticut police, creating the commemorative manhole covers that were installed in the city streets of Hartford after the exhibition.
The earliest manhole covers were stone or wood slabs used to cover trenches that carried sewage away from cities. They date from 3500 BCE. With the industrial revolution in the mid 19th century when more complicated water, sewer and gas systems were installed they were updated and often marked with what system was down below.
Getting back to “my” manhole cover, I found that the design was based on the seal for the city of Santa Fe, with symbols from the coats of arms of Spain and Mexico, plus the 13 stars for the United States.
Manhole covers have been called “The Art of the Streets”. Diana Stuart wrote a book called “Designs Underfoot: The Art of Manhole Covers in New York City”.
She laments the fact that these bits of urban architecture are being lost to urban renewal. There is one way to preserve these objects, and that is by collecting them, and people have done so, but maybe not in city apartments, as they are rather heavy. Most are made of cast iron and weigh between 100 and 250 pounds, depending on their size!
Most manhole covers are monochromatic, and you have to be looking for them to notice their design. You certainly can’t see them when you are driving over them. In Japan, however, manhole covers are created as colorful works of art. This actually makes people want to look down, that is, if they have the time. The vast majority of municipalities have their own manhole covers as a point of pride and creative art. As an example, here is one from Shizuoka City commemorating, among other things, the World Cultural Heritage site of Mt. Fuji and Miho Matsubara Beach.