The Manhole Riser/Collar System from Whirlygig replaces concrete grade/adjusting rings, stuffings and grout with a molded thermo-plastic form, pre-trimmed to the final grade. The radial form ...

Allows you to raise the lid and tilt the lid to match the new road crown Riser heights start at 1 ½-in. and go up in ¼-in. increments Edge milling operations remove asphalt 3 to 4 ft.

RALEIGH (WTVD) -- The latest public art project in the city of Raleigh is turning concrete sewer manhole risers along a popular greenway off North Hills Drive into a canvas. The public art project ...

This week, Lancaster Watchdog examines both raised and sunken manholes and utility covers that have long peeved motorists. Of all the complaints to Watchdog, there is one that transcends locale ...

This bid is for providing the Authority with manhole riser rings of the sizes indicated in the bid form as further outlined in the bid document. Copies of the bid document may be obtained at no ...