12 x 42 ironing board cover_large wipeable tablecloth

Drain channels, also known as trench drains or drainage channels, are linear systems designed to redirect surface water away from driveways and other paved areas. These channels collect water runoff during heavy rains, melting snow, or even from everyday precipitation. By channeling this water away, drain systems help prevent flooding, erosion, and water pooling, which can weaken the driveway’s surface over time.

Other manhole shapes can be found, usually squares or rectangles. For example, in the United Kingdom nearly all manhole covers are square or rectangular and very occasionally triangular, but almost never circular. Nashua, New Hampshire, is unusual for having triangular manhole covers that point in the direction of the underlying flow. In 2011, the city began gradually phasing out the triangles,^[9] which were made by a local foundry, because they were not large enough to meet modern safety standards and a manufacturer for larger triangles could not be found.^[10] Some manhole covers in Hamilton, Bermuda, are triangular, and hinged. Some triangular water-main covers also exist in San Francisco.^[11]

3. Safety Features