Jeff Wilson Everyday DIY Blog

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.

Reduce, reuse, recycle. This is the simplest mantra of the environmental movement and the guiding principle for families and small programs across the nation. How does this principle apply to infrastructure, specifically asphalt pavement? We already use as little asphalt pavement as we can, but this is more an economic decision. We recycle asphalt pavement to build new pavement. We reuse it as clean fill. What else can we do with it? Can we use it to collect solar energy?

Located in Freeport, Pennsylvania, about a 30 minute drive north of Pittsburgh, Buffalo Township’s water treatment plant produces over 700,000 gallons of fresh water daily. The plant provides drinking water to over 5,000 residents in Buffalo Township and Freeport Borough. It is also the fresh water supplier for the Municipal Authority of South Buffalo Township. Join Buildipedia for a photo tour of Buffalo Township’s water treatment plant, as we trace the flow of water from the Allegheny River to its distribution throughout the utility.

Buffalo Township’s wastewater treatment plant is located along Buffalo Creek in Pennsylvania, beneath the State Route 28 bridge. This type of wastewater treatment plant is perfect to serve smaller communities. It supports 6,000 people with 3,100 sewer connections to homes and businesses throughout Sarver, Pennsylvania, and the vicinity. It’s an excellent example of an efficient wastewater infrastructure that uses extended aeration to treat raw sewage, without any initial sedimentation.

The American Society of Civil Engineers (ASCE) includes Levees on its 2009 Report Card for America's Infrastructure, giving them a D–. The category of "Levees" covers major flood control works. However, what about the water that causes the flooding that levees protect against? Throughout drainage basins comprising thousands of square miles, stormwater runoff makes its way downstream. Obviously some systems convey that stormwater and even control it. ASCE says nothing about these storm sewer systems, but they form a vital part of America's infrastructure.

Information on low-flow plumbing fixtures abounds, and low-flow and waterless urinals are now in widespread use. Flush volume for toilets has evolved to 1.6 gallons per flush, or less than half of the 1980s' standard of 3.5 gallons. The fact that low-flow fixtures can save money in utility costs is clear and easy to calculate with a review of a water bill and an estimate of each fixture’s cycles per month. An enticing payback period for a new fixture purchase can be calculated based on water use alone. However, some facility managers argue that the utility savings offered by these plumbing fixtures are not matched by the unforeseen maintenance and repair costs that they generate. The question of whether low-flow plumbing fixtures offer a good return on investment (ROI) arises.

Thermal imaging or infrared thermography is a nondestructive maintenance method that uses infrared cameras to measure the amount of thermal radiation emitted by objects, which is converted to temperature. Normally, to measure the temperature of objects near room temperature requires the detection of radiation in the infrared wavelength range (which is much longer than that of visible light, i.e., approximately 400–700 nanometers). Infrared images are normally colorized so that objects that emit more thermal radiation than others will appear as brighter colors (yellow, red, and white). Cooler objects appear in darker blue, purple, or green colors. Although thermal imaging normally detects only surface temperatures, infrared signatures often indicate temperatures inside structures.

For several years universities in the United States have been looking into the feasibility of using asphalt pavement to collect solar energy, or, more correctly, to harvest the solar energy that asphalt pavement is already collecting. Researchers have found that the technology exists for harvesting this energy, and its implementation may not be that far off.

Throughout the last 10 years LEED (Leadership in Energy and Environmental Design) has developed into an efficient and effective solution for building owners to reduce expenses and limit the environmental impact of their buildings. Although many LEED projects take the form of typical commercial, institutional, government, and healthcare facilities, LEED provides many other sectors the ability to differentiate and produce a truly rare project, none more so than the Twin Oaks Landfill in Grimes County, Texas, which achieved LEED Silver certification.