The manhole covers in New York are generally made of metal

 

or concrete

 

, though plastic (composite) covers

 

also exist.
All concrete covers found on the site are not manhole covers but serve as information covers

 

.
Their shapes include rectangular

 

, round

 

, square

 

, and octagonal

 

.
A bow-tie-shaped cover

 

was also identified in New York.

No colored covers were found in the city; however, golden covers

 

do exist.
The city emblem does not appear on the covers.

Many covers are designated for the City of New York

 

, for the energy company ConEdison

 

, and for other entities.

The intended function appears on some covers: sewer

 

, water

 

, traffic

 

, and others.

A relatively large number of covers bear markings indicating that they were manufactured in India

 

.

In the New York subway system, one can find a sculpture depicting an alligator emerging from a manhole

 

(from a cover typical of New York

 

).

Gregg LeFevre Plaques
New York features a large collection of plaques created by artist Gregg LeFevre. These are golden “information” covers with striking graphics, each dedicated to a specific theme.
Examples include:

Union Square Trail - a series of plaques encircling Union Square, depicting the square’s history

 

Park Avenue Plaques - plaques illustrating historic buildings in what was once the center of New York’s architectural community

 

Library Trail - plaques at the entrance to the New York Public Library featuring quotations from well-known books

 

Apollo Theater Walk of Fame - commemorating artists who performed at the venue

 

Manufacturers
Most covers do not bear the manufacturer’s name. Manufacturers identified include the American company ej

 

, General Foundries (also American, though some of its covers were produced in India)

 

, and several others.

Standards
No standard markings were found on the covers in New York City.