U.S. Infrastructure: Small Flood Control

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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.

Low-Flow Plumbing Fixtures: Are They a Good Return on Investment?

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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: An Important Maintenance Tool

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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.

Asphalt Pavement Solar Collectors: The Future is Now

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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.

LEED Silver-Certified Landfill: The First of Its Kind

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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.

Just Say NO ..... to Detention Ponds

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Civil engineers design them, landscape architects loath them, developers wonder why we need them and municipal engineers often require them - I hate them. Retention and Detention ponds have become the standard for stormwater management on commercial and residential projects throughout most of the US. They were originally intended for flood control and were later incorporated into water quality requirements as well. They serve in their capacity to attenuate peak flows from new development reasonably well, but their usefulness stops there. Here are a few of the reasons that I'm not a fan of detention/retention ponds:

Pelamis Wave Energy Converter: Renewable Energy from Ocean Waves

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The notion of harnessing energy from the sea has captured the human imagination for years. With interest in renewable energy at an all-time high, steps are being taken to turn this idea into a reality.

As the global need for renewable energy sources continues to surge, one innovative company has released technology that could have a major impact on utility and energy companies, as well as their customers, well into the future. The Pelamis Wave Energy Converter, made by Scottish company Pelamis Wave Power, is the first commercial machine that can generate electricity from offshore wave energy. Since the company first tested its prototype wave energy converter between 2004 and 2007 in Scotland, four additional Pelamis machines and two designs – the P1 and the second-generation P2 – have been created.

Haiti Orphanage by HOK

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HOK Architects has partnered with the U.S. Green Building Council to rebuild a Haitian orphanage. As early adopters of biomimicry principles, HOK Architects took inspiration from the native Kapok tree for the building’s design.

The lives of thousands of children were devastated by the magnitude 7.0 earthquake in Haiti on January 12, 2010, but thanks to a building initiative, many of these children will soon have a new place to call home.

Pervious Pavement: Pavement That Leaks Like a Sieve

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Contractor to Contractor: In this first of a two-part series, contractor-turned-homebuilder Fernando Pages Ruiz discusses permeable pavement, which allows rain and snow to seep into the ground.

What Is Pervious Pavement?

Pervious concrete came to the attention of the building community in the United States after Congress passed the Clean Water Act in 1987. With restrictions in the amount of stormwater runoff permitted from roads, parking lots, and other impermeable surfaces, some developers began to look for environmentally friendly alternatives. They found it in an exotic, water-sucking concrete first tested in Florida about 30 years ago as a flood-control device. Engineers placed highly porous concrete paving in spots along Florida roadways frequently submerged by heavy downpours. The permeable surface provided a quick-drying roadway that didn’t stay flooded after the storm.

Green Home of the Month: Ross Street House in Madison, Wisconsin

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This month’s featured home in Madison, Wisconsin, is the personal residence of Carol Richard, AIA, LEED AP, and founding partner of Richard Wittschiebe Hand, an award-winning firm in Atlanta, Georgia.

Architect Carol Richard isn’t new to the challenges and rewards of designing and building green homes. In fact, she has spent her entire career helping her clients to marry livable, modern aesthetics with sustainable design. So when she and her husband, mechanical engineer Fred Berg, began to make plans to build their full-time residence upon retirement, the experienced duo was determined to pour all of their collective knowledge and expertise into a sustainable-living dream home.

Dealing with Discrepencies Between a Contracted Price and the Final Payment Application

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Welcome to the On Site channel’s Construction Administration Column. What should you do when there is a discrepancy between the amount on a payment application and the amount that was contracted? Here David A. Todd, P.E., CPESC, gives his opinion.

Columnist David A. Todd, P.E., CPESC, has 37 years of experience in the architecture, engineering, and construction (AEC) industry and has performed much construction administration during that time. He will answer questions from our readers or from his own practice and will provide answers based on his understanding of the construction process and administration of the construction contract. The focus will be on the customary duties of the owner, contractor, and design professional as typically described in the contract documents.

Through These Photographer’s Eyes: The Glass House, Part Three

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In September 2011, publisher Rizzoli New York released The Glass House, a photo tour of Philip Johnson’s famous estate. The book includes text by Philip Johnson himself and by architecture critic Paul Goldberger, and is the official Glass House book of The National Trust for Historic Preservation. Robin Hill’s photo “Glass House Dawn” was selected to appear on the book’s cover.

Below is the final piece of a three-part installment wherein Robin Hill shares his experience of photographing the Glass House estate. View Part One and Part Two for the rest of the story.

My journey continues in its roundabout way, and I am now upon a gate, the likes of which I have never seen before. It is most unusual. I try to find a historic connection to its design but find none. What I do find is a beautifully scaled, welcoming structure that entices one to enter. It is everything that an entrance way to a gated community is not. Even when the barrier is down, it feels open. The Pillars rise high on both sides and are painted a welcoming tone of brown, quite different from the brown that smothers the library. Slung low across the bottom quarter is a brushed aluminum tube that splices the composition perfectly, both in terms of its height and its color. The gate is also quite a trick of visual play, as it actually consists of four pillars, not two as it appears from the full frontal view. The pillars on either side stand back to back with their identical twins behind them. This is a very clever way of hiding the mechanism that lifts and lowers the gate. The wires are hidden from the front view and delicately balance the gate between the two pillars. The engineering is sublime and gives a gentle equipoise to the whole structure. There are not enough Os in the word "smooth" to describe this gate.