After delaying the process for several years, California sold $1.2 billion worth of bonds to help fund construction of 118 miles of the high-speed rail line in the Central Valley. The bond sale, however, will only partially fund the $64 billion project, and no funding source has been identified to complete it.
Minnesota's MnRoads, a pavement testing facility in Albertville, will begin new research in June. Old cells along the tracks will be dug up and analyzed for a final time, and tests will begin on cold-weather effects of "fiber-reinforced concrete, asphalt overlays of concrete pavements, cold central plant recycling and concrete partial depth repairs."
Pull planning -- a collaborative effort by all involved in a construction project, which means a total of "hundreds of years of experience" -- can create a construction schedule that can be tweaked at each milestone. The goal is to streamline the project, cut costs and increase efficiency.
Cities have traditionally built tunnels or storage basins to prevent combined sewer overflow, but some communities are looking now to green technology such as planted swales and "bio-retention cells" to solve the problem. Five cities explain what they're doing to mitigate CSO.
Bloomberg New Energy Finance says the cost of solar energy, already the cheapest source of power in some regions, could drop an additional 36% by 2025. Here’s a look at the many ways solar is accessible, including on the roofs of vehicles, on huts in Mongolia and towering apartment buildings in larger cities.
Construction should start today on a Centene Corp.'s multiphase office expansion project in Clayton, Mo. The first phase of the $770 million expansion involves building a 28-story tower.
Preliminary construction work started last month at the $400 million Pensacola Bay Bridge project in Florida, and crews today will begin to install a temporary trestle for materials delivery. Skanska USA is the contractor.
After working out some kinks, ETH Zurich's In Situ Fabricator1 robot could make it much easier to fabricate building elements on-site, as the machine adapts to a site's changing environment. In recent tests the robot built a wavelike, 1,600-brick wall and welded steel to create a curved mesh for concrete.
The $4.2 billion Rover natural gas pipeline under construction in Ohio has received a notice of two violations from the Ohio Environmental Protection Agency for dumping 2 million gallons of drilling mud into local wetlands. Energy Transfer Partners halted construction at one of the sites to clean up the mess and construct barriers to keep the mud from entering public water systems.
St. Louis is required to spend $4.7 billion over the next 23 years to take care of 13 billion gallons of raw sewage that flows into the Mississippi River annually. The city will build a massive tunnel system and is working with the Environmental Protection Agency to find innovative ways to reduce the cost of the project, including spending $100 million on a green infrastructure initiative.
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