Discussing current issues in engineering
Following a deadly earthquake in Lombok, Indonesia, Dr. Jan Bernal-Sánchez writes on researching ways to improve building foundations in this article. Earthquakes are one of the deadliest natural disasters, according to the Centre for Research on the Epidemiology of Disasters, and despite constant improvements in both civil engineering and emergency systems, deaths often adversely affect low-income people living in developing countries.
Dr. Bernal-Sánchez writes that previous attempts to alter building foundations to make them stronger have been successful, but installation is typically expensive and difficult. His solution is to introduce foundations made from local soil mixed in with scrap tire, a material that overpopulates landfills but can still be put to good use.
The proposed rubber-soil mixture helps to absorb vibrations from a potential earthquake and can even change the natural frequency of the soil foundation.
Research is still ongoing to perfect the soil-to-rubber ratio, but with the right amount of reliable simulation tests and funding, this study shows promising results to help avoid high death tolls from earthquakes in the future.
As the year comes to a close, we’re thankful for the opportunity to spend time with friends and family and all the wonderful connections we’ve made with our community. In the spirit of the season, here are some fun facts about the numerous December holidays:
Hoping that you and yours have a happy holiday and a joyous new year!
Engineers at the University of California, Berkley, have developed a new way to remove contaminants from stormwater, according to an article published in Science Daily in August of 2018. By using sand coated with manganese oxide that reacts with and destroys pollutants, this innovative technology could be a long-awaited answer for communities that urgently need greater access to fresh water supply. The engineered sand could help purify the stormwater that infiltrates underground aquifers and create safe reservoirs of drinking water for these communities.
Currently, cities already use stormwater reclamation as ways to remove contamination from stormwater runoff, but fully developing this sand could create a safer, more efficient solution. This is especially pertinent in California, the place of its invention, where recent wildfires and other natural disasters make access to fresh water urgent and essential. Experiments are still ongoing, and the team of scientists and engineers hope to move on to performing field tests to work on making the sand sustainable and less labor-intensive to regenerate.
The full article can be found here on the Science Daily website.
The article “Rising Above” in the November 2018 issue of the magazine by The American Society of Civil Engineers features historical and modern information on the Bayonne Bridge, which originally opened in 1931. Stretching across Staten Island, New York and Bayonne, New Jersey, the bridge was once the largest steel arch bridge in the world with a span of 1,675 feet, and its significance led to its designation as an ASCE historic civil engineering landmark in 1985.
The Bayonne Bridge Navigational Clearance Project was tasked with expanding the bridge’s height to accommodate newer, taller ships. According to the article, the notable undertaking started with a feasibility study “that addressed and documented 41 options that were evaluated for technical feasibility, constructability, environmental impact, schedule, and cost.” A tunnel was initially considered as a different option, but the Port Authority decided not to demolish the landmark and update it as it stands instead.
Design began in 2011, when civil engineers began working to rehabilitate and strengthen the arch, planning for new roadways, and thinking of ways to stage construction that still allowed commuters to continue using the bridge during the project. The roadway project was completed in February of 2017 and it received the American Council of Engineering Companies 2018 Grand Conceptor Award in April of 2018 for the project’s economic benefit, scale, and complexity. Workers are still putting up the final touches on the bridge, with completion projected for mid-2019.
More details and pictures of this impressive project, as well as the complete article, are available here at the ACSE website.
In a publication by the U.S. Department of Housing and Urban Development, a study takes a look at ways to expand housing opportunities through inclusionary zoning (IZ). The study, conducted by the Urban Institute in 2012, focused on two counties in Maryland and Virginia to examine the effectiveness of IZ programs.
Inclusionary zoning requires builders of new residential developments to set aside a certain percentage of housing units for low-income residents. The Urban Institute found that counties implementing inclusionary zoning had stronger housing markets as long as programs are kept up to date with affordability levels and unit requirements. Research into housing agencies’ and nonprofit organizations’ use of IZ-produced units can help developers understand how to sustain and extend IZ affordability in other counties.
Although the study concludes more research is necessary to evaluate the costs and benefits of IZ programs, it shows that IZ programs provide important aid to those who need it. If more regions choose to implement IZ practices, the benefits of high-quality school districts and employment opportunities will become more easily accessible to residents who rely on affordable housing availability.
To learn more, check out the complete report, "Expanding Housing Opportunities Through Inclusionary Zoning: Lessons from Two Counties."
In the September 2018 issue of “Civil Engineering” magazine from the American Society of Civil Engineers, an article by editor-in-chief Laurie A. Shuster discusses the rising class of young engineers. In her editor’s note, she writes that “millennials want to be a part of something greater and more important, beyond what benefits just themselves. And they find that in their careers as civil engineers.”
Millennials’ affinity with growing technology and social media grants them the skills to easily adapt and self-teach new programs that would typically take more training for those who grew up in different technological ages.
From her experience attending ASCE’s Younger Member Leadership Symposium, Shuster notes young engineers’ big picture visions, ambition, and desire to improve their communities beyond themselves. Our future generation of engineers looks bright!
The Harrisonburg Planning Commission will hold a public hearing this Wednesday, October 10th at 7pm in City Council Chambers (409 South Main Street) to consider the City’s Comprehensive Plan. According to the city’s official notice, everyone will have the opportunity to express their views at this public hearing and at others held by the City.
Wednesday’s meeting will discuss the proposed Comprehensive Plan, which includes an updated Land Use Guide and Street Improvement Plan.
It’s important for our community and its citizens to participate in public hearings to make sure any questions and concerns from the public can be considered for upcoming projects. Please consider attending!
Comments may also be sent to Thanh.Dang@harrisonburgva.gov or addressed to the Department of Planning & Community Development and will be shared with the Planning Commission and City Council.
With recent flooding along the East Coast, flood management and prevention is a priority for civil engineers more than ever. While there’s no way to know exactly how much damage a natural disaster will cause ahead of time, it’s part of our job to think ahead and have plans set in place for any situation.
Solutions before and after a flood include a comprehensive stormwater approach and floodplain protection and recovery, along with traditional methods when needed to safely divert excess water and other storm run-off after heavy rain. With recent flooding after hurricanes hit the East Coast, flood prediction and disaster management are especially relevant ways to address the issues that come with natural disasters.
The October 2018 issue of PE Magazine features the article “Overwhelmed,” which discusses the measures officials must take for future flood prevention after Hurricane Harvey. According to the Harris County Flood Control District, 4.7 million residents of the Texas county were affected in some way by the flooding, and Hurricane Harvey stands as one of the country’s costliest weather events at $125 billion. Some structures, such as the Texas Medical Center, didn’t experience damage because of protocols, improvements, and systems implemented after Tropical Storm Allison in 2001. Even so, with the wide-reaching damage that occurred across the state, it’s important to think ahead by implementing improvements that work to minimize disaster impact before it strikes.
While location is always a consideration before starting a new project, living in a floodplain can make building in easily-flooded areas inevitable. Understanding potential risks and thinking ahead makes all the difference when it comes to the environment. Our firm offers Feasibility Studies, Environmental Impact Reports and Environmental Site Assessments to help you understand how to get started. Our team is here to provide you with the high-quality engineering services your project deserves. Contact us to get started.
You’re interested in buying a piece of property and have a vision for developing it……now what?
Don’t jump into purchasing just yet! Make sure your vision can become a reality by considering these questions first:
Commissioned engineers determine feasibility by identifying clear or hidden problems that may occur during the planning, design, government review, and construction stages. These problems are identified through a comprehensive analysis of information related either directly or indirectly to the property. This data is comprised of three main categories: legal condition, physical condition and regulatory concern.
It’s important to note that feasibility is more than just a technical consideration. Engineers also consider more ambiguous problems such as citizen opposition, or governmental preferences and push-backs. This collective information will become an essential tool for planning and development, and with effective preparation comes success.
Are you interested developing a piece of land, but not sure of the risk? If so, give us a call! We offer Feasibility Studies, Environmental Impact Reports and Environmental Site Assessments. Our team is here to provide you with the high-quality engineering services your project deserves. Contact us to get started.
During site development it’s important to have and maintain a good erosion and sediment control (ESC) plan. It's not only wise to have one, but chances are your locality requires you have one because of the property destruction and drinking-water pollution that can occur. Erosion and sediment control plans are a combination of various temporary installations that either contain, filter or stabilize sediment during land-disturbing activities. The Virginia Department of Environmental Quality (DEQ) states that these measure help "prevent soil movement or loss, enhance project aesthetics and eliminate appreciable damage to off-site receiving channels, property and natural resources."
All jobs sites must have, at minimum, a silt fence for catching runoff sediment and it must be installed prior to development. More effective methods for erosion control include diversion dikes and sediment traps for channeling the runoff and settling trapped sediments. Methods for stabilizing sediment include vegetation establishment, in which developers lay either temporary or permanent seeding that’s covered by hay or mulch.
Does your upcoming development project need an engineered ESC plan? If so, give us a call! Our team is here to provide you with the high-quality civil engineering services your project deserves. Contact us to get started today.
Colman Engineering, PLC
A professional engineering firm located in Harrisonburg, VA