Click here for this month's Web extras:
From "New hope for old bridges"
From "Structural cured-in-place pipe for trunk water main pipe"
From "Payload finally pays back"
Click here for Web extras from the 2011 Public Works Manual
Bridges & Culverts
From "NEW HOPE FOR OLD BRIDGES"
AASHTO's new inspection guide may help boost repair funding.
Buy a copy of the AASHTO Bridge Element Inspection Manualhere.
Click here for a video overview of AASHTO's Pontis bridge management software.
Administration & Management
FROM "STRUCTURAL CURED-IN-PLACE FOR TRUNK WATER MAIN PIPE"
Minnesota cities sign a joint powers agreement to install an emerging rehabilitation technique.
A robotically controlled cutting device reinstating a water service lateral from inside the pipe.
After the completion of hydrostatic pressure testing, the end of each water service's corporation stop is located via closed circuit television equipment (CCTV) by looking for a protruding dimple they cause in the liner surface. This photo shows a dimple caused by the end of a 1-inch-diameter corporation stop.
Using CCTV, the head of a cutting tool attached to a robot is moved into position over the center of the dimple. Once in position, the cutting head removes the portion of the liner covering the entrance to the service pipe.
This robot has just finished cutting open the entrance to a corporation stop. The robot and its attached cutting head have been retracted out of the way. Liner cuttings lay on the side wall and bottom of this rehabilitated 12-inch-diameter trunk water main pipe.
After reinstatement of all of the water service pipes, the line is flushed, disinfected, and put back into service.
FROM "PAYLOAD FINALLY PAYS BACK"
New emissions standards factor vehicle use into the equation.
Update: U.S. EPA and NHTSA's first-ever fuel economy and emissions standards for heavy-duty vehicles
Background: "Feds Propose Mileage, Greenhouse Gas Standards for Heavy-Duty Trucks," ProSales magazine (Oct. 25, 2010)