The District's sewer system contains nearly 8,000 manhole covers. Every time a road in the District is re-surfaced, the manhole cover must be raised. The District employs two full-time manhole crews.
Raising manhole covers is difficult and physically demanding work. Covers must be raised correctly to keep the road surface smooth for traffic and avoid problems with snow plows.
Crews use an asphalt recycler to minimize waste, save money, and complete the job quickly.
After the recycled asphalt has been placed and compacted, the road surface is immediately ready for traffic.