{Re}habitat

As stated in Watts it Matter to You? Electricity Generation, the American Society of Civil Engineers (ASCE) assigned the United States’ ENERGY infrastructure a grade of “D+” on their 2009 Report Card for America’s Infrastructure. Electricity transmission, which is the second of three installments on energy, covers transmission lines and grid networks, “green” power transmission, and "smart" grids. Electricity distribution will be covered in installment three as we follow the path of electricity from a power generating facility to your home or business.

As stated in Watts it Matter to You? Electricity Transmission, the American Society of Civil Engineers (ASCE) assigned the United States’ ENERGY infrastructure a grade of “D+” on their 2009 Report Card for America’s Infrastructure. “Electricity Distribution” explains the final step in the path of electricity from a power-generating facility to your home or business. It covers the electric utility business model, how the distribution infrastructure drives generation and transmission decisions, and metering electricity.

In most cases, property owners are required by regulation to maintain pond embankments and outfall works as related to structural integrity and dam safety. Proper maintenance also lessens the liability of pond and lake ownership by reducing the likelihood of failures that can impact downstream property. Owners or property managers may believe that proper maintenance is occurring only to later learn that they need expensive repairs. This situation illustrates that many contractors providing routine maintenance, such as landscapers, are not trained to properly identify issues that can be problematic or lead to increased cost of ownership.

Theodore (Ted) E. Scott is the Managing Member of Stormwater Maintenance, LLC, in Hunt Valley, Maryland. He has provided our audience some insights into the inspection, maintenance, and repair of storm water systems. There are three categories of these systems that we’ll investigate: surface basins, underground structures and drainage systems.

The City of Takoma Park, Maryland, needed to replace a failing retaining wall that supports a roadway in a small residential development. The Linden Avenue site is directly adjacent to Sligo Creek, which is a tributary of Anacostia Creek, a river undergoing a significant restoration effort. T. E. Scott & Associates, Inc., designed a replacement for the failing retaining wall infrastructure, created a pocket park for the local residents, and provided water quality treatment for the unmanaged watershed. This combination of aesthetic and environmental improvements adds value to the project. We’ll look at some stormwater flow design calculations, a storm water flow splitter, an urban modular wetland unit, a step/plunge pool, and an interesting retaining wall design.

Wastewater systems is the sixth topic in our U.S. infrastructure series. The American Society of Civil Engineers (ASCE) assigned the United States’ WASTEWATER infrastructure a grade of “D-” on their 2009 Report Card for America’s Infrastructure. Here we explore the funding issues that effect the aging treatment plants and waterways that make up our nation's wastewater infrastructure.

Zach Kent is a stormwater engineer for Modular Wetlands in Oceanside, California. We learned about Modular Wetlands’ urban wetland unit in our case study, “Water Quality Retrofit and Retaining Wall Remediation.” We've partnered with Kent to provide a perspective on some dynamics within the stormwater management industry over the last decade, including new processes and technologies designed to meet higher regulatory standards.

Although there are far more residential fires than those involving non-residential structures, commercial fires still have a hefty price: in 2009 the 103,500 non-residential fires cost 105 lives and over $3 billion in losses, according to the U.S. Fire Administration. Preventive actions are critical to avoid these losses altogether. That’s where a properly designed and installed fire alarm system comes in.