Written By: Samantha Justice, P.E. Dams and Spillways Are a Critical Part of U.S. Infrastructure With estimates of 91,804 structures nationwide, dams and spillways are essential for controlling flooding, water distribution, and providing hydroelectric power. However, these structures cannot last forever. The average age of dams and spillways in the U.S. is now 61 years (USAFacts), significantly over the typical 50-year lifespan of these structures. Aging infrastructure can lead to serious consequences if safety precautions are not taken or measures are not implemented to address identified problems promptly. Continual inspection and upkeep are crucial for any dam manager. The 2021 Infrastructure Report Card by the American Society of Civil Engineers rated the condition of U.S. dams with a “D” grade, highlighting the pressing need for repairs and maintenance (Home). State and federal regulations provide a framework for assessing and maintaining dam and spillway structures, requiring at least yearly audit inspections to identify areas needing repair or replacement. Performing these repairs can help extend the lifetime of dams, maintaining essential services without excessive costs or increased failure potential. Understanding Areas of Concern for Existing Structures The vast majority of America’s rivers and lakes have existing dams and spillways, and as such,… Read more »
Posts Tagged: Engineering
The Dangers of Breaking Specs and Bid Shopping
Written by Sam Justice, P.E. Building roads, housing, and other critical infrastructure is a great responsibility taken on by engineers, architects and project owners. Ensuring that these structures are safe and reliable for years and decades is of the utmost importance at all stages of design and construction. The Challenge of Maintaining Quality in Construction The design team creates building plans and the associated specification that capture the essence of their vision as they work to write the guiding documents for their project. They make decisions about product types, grades, and take great pains to build into their documents citations of certifications and standards to assure only quality materials are allowed on the site. However, product competition and budget demands are a concern seen in many projects that can challenge the specifications intended to produce the best possible structure. Substandard “or equal” substitutions can be encountered in the critical moments between design, bid awards, and construction. It is up to the specifying engineers and architects to hold their spec in all phases of the process to ensure the right materials and installation procedures are used. The Bidding Process and Material Selection Contractors often produce bids with the materials indicated by the… Read more »
7 Key Factors to Choosing the Right Geocell
Choosing the Right Geocell Does excellent quality and support matter to you? Of course it does. But, you are smart enough to know that there is no free lunch. Low cost alternatives are less expensive for a reason. So, what do you need to look for to recognize the right geocell for your project? Quality Feedstock Insist upon verifiable proof that your geocell is manufactured only with virgin high density polyethylene. While it is possible to achieve poor weld strength with virgin materials, it is impossible to achieve consistently excellent weld strength unless only virgin high density polyethylene is used. Integral Components Choose a geocell that offers connection components, tendons, stakes, load transfer clips and installation tools that are specifically tailored for the system. Using rope, staples, bent rebars (J hooks) and zip ties that are not specifically designed for use with a geocell engineered solution is unwise and potentially catastrophic. Use only designs that recognize the critical nature of these components to the overall success of the project. Experience and Warranty Choose a manufacturer who has thousands of projects and decades of experience. It is shocking how little some manufacturers understand about the principles and practices of engineering and… Read more »
Women in Engineering: Meet Sam Justice, P.E., Design Engineer at Presto Geosystems
International Women in Engineering Day (INWED) takes place every year on June 23 to celebrate the work and achievements of women in the field of engineering. INWED provides an opportunity to raise the profile of women engineers and highlight the career opportunities available in this industry. Historically, women have been under-represented in the academic and professional engineering fields; however, numbers have increased over the years. In 1960, about 1% of all engineers were women. In 2019, women made up approximately 20% of the engineering workforce. Organizations like the UK’s Women’s Engineering Society (WES) hope to see these numbers grow even more as they work to provide young women with resources and opportunities that encourage them to pursue careers in engineering. The organization launched Women in Engineering Day in 2014, and the holiday became globally recognized in 2017. Each year, people participate in hundreds of INWED events across the globe. In honor of INWED 2021, we’re sitting down with Presto Geosystems’ very own Civil Design Engineer, Sam Justice. Backed by a decade of specialized engineering experience, Sam is an accomplished civil engineer with a proven history of guiding complex projects to successful outcomes. She holds a geotechnical engineering degree from… Read more »
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