C+S June 2021 Vol. 7 Issue 6 (web)

C+S June 2021 Vol. 7 Issue 6 (web)

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CONTENTS

PAGE 13

THE COVER A Texas-Sized Endeavor – story on page 10

CHANNELS ENVIRONMENTAL + SUSTAINABILTY 13 Underwater Visualization Drives Timely, Successful Habitat Restoration Project STRUCTURES + BUILDINGS 16 The Durability Factor with Cold-Applied versus Hot-Applied Liquid Waterproofing 18 The Shark Habitat Challenge TRANSPORTATION + INFRASTRUCTURE 20 Leading the Charge: Engineers Play a Key Role in Developing Electric Vehicle Infrastructure WATER + STORMWATER 22 Army Corps Partners with Community for First Line of Coastal Defense 2020 Atlantic Hurricane Season 24 Wilmington’s Riverfront Park 26 Sarasota Project “Hurricane-Proofs” Sewage Spills 30 City Park Golf Course Opens as a Key Project in Denver’s Platte to Park Hill Stormwater Program 32 Land & Water Improves Ecological Status of Southmere Lake as it Safeguards UK Waterways 33 Sun & Water BUSINESS NEWS 36 Envision is the Solution for Building Back Better – ISI’s ‘Sustain it or Explain it’ Blog SOFTWARE + TECHNOLOGY 37 Turnagain Marine’s Secret to Delivering the Icy Strait Berth II Seven Months Ahead of Schedule 38 The Future of Roadside Infrastructure 39 Completing the Picture: The Future of Hydraulic Modeling is Two Dimensional SURVEYING 41 The Ingenious Way 1 Alliance Geomatics Combats Survey Equipment Theft departments 8 Events 43 Benchmarks: Where did the pandemic affect industry firms on the income statement? 44 Reader Index Columns 5 Engineering Front Line: How will PFAS impact the AEC Industry? Stephanie Warino 7 Looking Back, Moving Forward: The Lake Leatherwood Dam Luke Carothers

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VOLUME 7 ISSUE 6 csengineermag.com

publisher Chad Clinehens, P.E. | 479.856.6097 | [email protected] media director Christy Zweig | 479.445.7564 | [email protected] Production & circulation manager Anna Finley | 479.435.6850 | [email protected] ART director Maisie Johnson | 417.572.4561 | [email protected] Editor Luke Carothers | [email protected]

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Civil + Structural Engineer (ISSN 23726717) is published monthly by Zweig Group, 1200 North College Avenue, Fayetteville, AR 72703. Telephone: 800.466.6275. Copyright© 2020, Zweig Group. Articles not be reproduced in whole or in part without the written permission of the publisher. Opinions expressed in this publication are not necessarily those of Zweig Group. Unsolicited manuscripts will not be returned unless accompanied by a stamped, self-addressed envelope. Subscriptions: Annual digital subscription is free. To subscribe or update your subscription information, please visit our website www.csengineermag.com/ subscribe/ or call 800.466.6275.

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Stephanie Warino P.G., WV LRS, PMP How will PFAS impact the AEC Industry?

There are many drivers in strategic business planning. The competitive environment, labor force conditions, funding cycles, commodity prices, international influences, and regulatory changes are all factors that drive market conditions, among others. Each factor is important and should be evaluated as a component of your strategic business planning market research. Some factors, depending on the markets you serve, can have larger impacts than other factors. One factor that will have significant, widespread impacts in the United States, and will especially affect the AEC industry and our clients, are emerg - ing contaminant groups. Emerging contaminant groups are chemicals – they can be man-made or natural. They are recently discovered, and they are classified as “emerging” because the environmental and overall health risks have not yet been quantified. There are a number of contaminants that the United States Environmental Protection Agency (EPA) classify as “emerging”. The most potentially impactful emerging contaminants under continuing investigation are a group of extensively produced, man-made chemicals called per- and polyfluoroalkyl substances (PFAS). This group of chemicals are extremely pervasive in the environment, are soluble in water, bioaccumulate, and do not break down easily. PFAS can be found in food, household items, in the workplace, in drinking water, and in living organisms. Many of the facilities in which AEC works could be sources, have produced or have utilized PFAS. These potential sources include aviation facilities, car washes, chrome electro - plating, anodizing, and etching services, coatings, paints, and varnish manufacturers, fire-fighting foam manufacturers, landfills, municipal fire departments and firefighting training centers, paper mills, petroleum refineries and terminals, photographic film manufacturers, polish, wax, and cleaning product manufacturers, polymer manufacturers, printing facilities where inks are used in photolithography, textile and carpet manufac - turing, and wastewater treatment plants. AEC and our clients will need to understand the technical and business implications for these emerging contaminants and the levels at which ac - tion could be needed. For chemicals which have been fully assessed and have a known, quantified health hazard, under the Safe Drinking Water Act, the EPA will issue a Maximum Contaminant Level (MCL). Currently, the US EPA is on a path to developing a drinking water standard for two of the most widely studied PFAS – and there are 4,700 PFAS. And the safe threshold right now is incredibly low. Currently, the EPA Health Advisory levels are 70 parts per trillion. Not only that, but specialized sampling methodology and equipment needs to be used to prevent sample contamination - much of the commonly used sampling equipment used to collect samples (tubing, sample containers, and sampling tools) may themselves contain PFAS. Upcoming legislation that seeks to have PFAS designated as a hazardous substance under the Comprehensive Environmental Response, Com - pensation, and Liability Act (CERCLA) would have significant and far-reaching effects in nearly all the markets that we, in AEC, operate within. This legislation, if approved, can result in enormous liabilities for both AEC and our clients. Sources of PFAS are incredibly varied and encompass many of the facilities in which the AEC industry works. Sites should be evaluated for emerging contaminant potential prior to property transfer and subsequent redevelopment. Already over 30 states have PFAS policies of some sort in place, which is predictive of the eventual federal outcome. This is just one group of emerging contaminants, and there are certainly others out there, including but not limited to 1,2,3-trichloropropane, 1,4-dioxane, 2,4,6-trinitrotoluene, dinitrotoluene, hexahydro-1.3.5-trinitro-1,3,5-triazine, and numerous others, including vapor intrusion, which is being investigated as an emerging contaminant (even though it’s really an exposure pathway for various volatile chemicals, and not a specific chemical). But PFAS are by far the most ubiquitous and lasting in the environment, and the most likely to have wide-ranging health effects due to their high rate of use, and their pervasiveness. The most immediate impacts, of course, will be to assess and address groundwaters and surface waters sources for potable water uses, as well as to address wastewater treatment. Both issues have some extremely wide-ranging implications, and it doesn’t stop at finding an unimpacted source of drinking water or designing a wastewater treatment plant to remediate for PFAS. For example, once you determine your existing source is contaminated, then not only is there the issue of finding a new water source, but also the issue of identifying the responsible party. This leads to the issue of investigating, delineating, and remediating the contaminated groundwater. With a re-designed wastewater treatment plant, there will be PFAS-contaminated byproducts that will need proper disposal. And so far, we’ve only talked about water and wastewater. Think about the environmental fate and potential remediation implications of PFAS in soil, in sediment, in landfills, and even as a contaminant in air. Remediation effort costs can range into the millions. For the AEC industry, our involvement in development projects, if there is environmen - tal due diligence, should include attention to this issue. Environmental risk is always manageable to some degree with careful, up-front due diligence – these steps are normally taken in a Phase I Environmental Site Assessment, which is an extremely commoditized task in the AEC in - dustry, so much so that they are sometimes conducted and produced using software. The more commoditized it has become, the more it becomes a sort of “check-the-box” mentality. AEC and our clients have a lot of challenges ahead of us with PFAS regulatory changes likely to be in the not-so-distant future. In addition, strategic market research may also be warranted for your firm to assess the potential business aspects - what clients are we currently serving that may be impacted, and not only how will it affect them and our operations. As a highly innovative industry full of brilliant people, we are up to the challenge - as consultants we can take action now to educate ourselves and our clients, and position both parties for the best possible outcome.

STEPHANIE WARINO is a Strategic Planning Advisor at Zweig Group. She can be reached at [email protected].

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Lake Leatherwood and the dam that created it are located in Eureka Springs, Arkansas, nestled snugly in the Boston Mountains region of the Ozark Plateau. If it’s your first time visiting the area, you are bound to hear a common local legend: that the Lake Leather - wood Dam is the largest hand-carved limestone dam in the country. While this is almost certainly not true, the real story behind the dam and its history is no less interesting or significant. Plans to create Lake Leatherwood came as a result of President Franklin D. Roosevelt’s Soil Conservation Service (SCS) at the

The Lake Leatherwood Dam: Construction, Life, and an Uncertain Future Luke Carothers

height of the Dust Bowl. In 1937, Arkansas Governor Carl E. Bailey signed legislation that split the state into four soil conservation districts. Amongst the projects that improved soil quality in the four districts, the Lake Leatherwood Dam was considered the premier project. When the dam was completed in 1940, it featured a concrete-poured core covered in locally-quarried limestone. It is this on-site quarrying that lends to the myth of it being the largest hand carved dam in the country. The other contributing factor to the myth is the dam’s size: 630 feet long and 55 feet tall. Work on the project began early in 1938 under the direction of the Works Progress Administration (WPA), the Soil Conservation Service, and the Civilian Conservation Corps (CCC). Straddling two hills, the dam is impressive when approached from either angle. When approached from beneath, the cascading fresh water and natural feel of the local stone give the structure the feeling that it grew from the landscape naturally. When you traverse the walkway across the dam’s span, you are treated to commanding views of not only Lake Leatherwood, but also the lush valley to the north. On one hand, the Lake Leatherwood Dam was constructed as a soil conservation project. Prior to the dam’s construction, the northern area of West Leatherwood Creek was experiencing significant forest loss. Once completed, the dam was able to curb further soil erosion and loss, which allowed the verdant land around the creek to flourish. Additionally, the formation of Lake Leatherwood provided a stunning outdoor space for local residents to enjoy canoeing, sailing, fishing, and swimming. From its initial plan to create Lake Leatherwood, the project soon grew to include several other buildings and facilities along its shores. These additional structures are indicative of the dual purposes the project served. Approximately one mile south of the dam, on Lake Leatherwood’s western shore, the CCC constructed a stone bathhouse and a barbe - cue pit to form a larger picnic area. In order to facilitate the building of the dam, workers had to construct a new road, which is now part of Country Road 61, connecting the park to Highway 62 and making the park much more accessible to modern tourists and local residents Along this road, workers for the CCC built 6 stone culverts and 2 bridges: one single arch bridge and one double arch. In addition, the service road workers used to access the dam has been repurposed as Beacham Trail, which allows hikers to traverse the shores of the 120 acre Lake Leatherwood and cross the top of the dam. For over 80 years, travelers and hikers visiting the region who are not afraid of heights have been able to walk the shores of the Lake and cross the small walkway at the top of the dam, accessing the Eastern shore. In August 1992, the site was nominated and accepted to the National Reg - ister of Historical Places. The report submitted with the nomination noted a few issues such as spalling in a few places, but otherwise recorded the dam as being in good condition. Since that time, however, significant issues have developed with the structural integrity of the dam's stone walkway. In March 2021, the Eureka Springs Parks and Recreation Commission announced that the dam was closed indefinitely to cyclists and hikers. After finding significant dam - age to not only the railings but the integrity of the concrete itself. The commission found the reasons for such rapid deterioration twofold. On one hand, the locally sourced concrete, poured half a century ago, would not meet current standards, making it more and more susceptible to corrosion as time goes on. On the other hand, the area recently experienced the severe cold weather that affected much of the Southern U.S. in February. This bout of extreme cold weather took a huge toll on the structure, shearing off large portions of the upper railing structure. Repairs to the dam have been estimated to be upwards of $500,000, which can be a daunting number for a municipally-owned park. Luckily, the integrity of the dam itself is not thought to be in jeopardy, only the portion open to the public. Moving forward, the City plans to reassess their maintenance and inspection practices and figure out what can be done to monitor the health of the structure moving forward. Although the dam is closed to the public for now, there is hope that the proper repairs can be made to ensure its continuing use by the public.

LUKE CAROTHERS is the Editor for Civil + Structural Engineer Media. If you want us to cover your project or want to feature your own article, he can be reached at [email protected].

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events + virtual Events

june 2021

at automatica sprint 2021 as a special solution regarding the current situation. Selected teams of roboticists from academic and professional spheres will converge to solve a modern day manufacturing grand challenge in a multi-day competition. https://www.robothon-grand-challenge.com/

Movin'on summit june1-4 – MONTREAL, PARIS, SINGAPORE, & virtual

Take advantage of 4 days of inspirational and interactive phygital programming expanded to 3 continents and broadcast live from TV studios in the innovation-driven cities of Montreal, Paris and Singapore. Immerse yourself in an imaginative range of learning, connecting and collaborating environments hosted on a new, hive-like digital event platform buzzing with activities and opportunities. https://summit.movinonconnect.com/ Practical leadership skills are vital to the health and success of every company in any industry. Effective leaders motivate their teams to achieve exceptional results, inspire others to be better than they thought possible, and create an environment where their team is focused and working towards a common vision. Zweig Group’s team of management experts – who have extensive experience working with AEC firms providing solutions to the challenges facing AEC firms today – deliver practical solutions that technical professionals can put to work immediately to lead their firms to success. https://shop.zweiggroup.com/collections/webinars/products/ leadership-skills-for-aec-professionals-virtual-seminar-starting-june-8- 2021?variant=39017810460823 Leadership Skills for AEC Professionals june 8 – virtual Cloud Architecture Summit features 6-10 vendors who will show how to make the cloud a core pillar of a modern end-to-end enterprise architecture. Cloud-Native Apps, Hybrid Integration & iPaaS, Modernize with APIs, Security and Governance, Enterprise-Class DevOps, AI/ML Lifecycle. https://www.idevnews.com/registration/cloud-architecture-summit A Syposium on the BIM-to-GIS Movement in the AEC Industry. In the second The Power of Where session, our AEC industry panelists bring the reasoning and approach to their firm's BIM-to-GIS workflow to light. We will discuss the real value BIM-to-GIS brings to their projects and the lessons learned in developing their workflow along the way. This session also features excellent insight from working practitioners of BIM-to-GIS that will guide your reasons for developing your firm’s spatial intelligence program. https://info.mg-aec.com/en-us/the-power-of-where Cloud Architecture Summit june 10 – virtual THE POWER OF WHERE june 15 – virtual

business of automated mobility forum june 23-24 – munich, germany & virtual

From drone delivery to driverless cars, automated mobility provides limitless opportunities and very real challenges. Join AUVSI and SAE International for the inaugural Business of Automated Mobility (BAM) Forum for tactical insights to get your business on the path to profitability. https://www.bam-forum.org/register july 2021

International Conference on Civil Engineering and Architectural Design july 1-3 – munich, germany

CEAD Germany 2021 will make an ideal stage for worldwide, as it unites famous speakers, specialists, business people over the globe, with a generally energizing and important logical occasion loaded up with a lot of edifying intuitive sessions, world-class display, Oral and publication introductions. Civil engineering conference 2021 show’s a goal to furnish the development, business with a profoundly engaged entryway to learn, arrange, and exploit the significant developments and Learning. https://ic2020cead.org/ Each team member brings their own unique experiences and skillset to project teams. Effectively leveraging the talents of your team can optimize team effectiveness. Project Management for AEC Professionals provides people-focused, science-driven practical skills to help project leaders harness the power of their team. By addressing the most important aspects of any project – the people – this course will provide practical techniques that can be immediately implemented for a positive impact on any AEC team or business. Project Management for AEC Professionals july 6 – virtual https://shop.zweiggroup.com/collections/webinars/products/project- management-for-aec-professionals-virtual-seminar-starting-april-7- 2021?variant=39017656877207 AUVSI’s Automated Freight Summit (AFS) will take place July 7-8, 2021 as a virtual event, diving into all things automated freight – safety, insurance, workforce, policy, and more. Join a diverse set of summit attendees as we tackle key questions related to accelerating the safe deployment of automated freight across the United States already underway. https://www.auvsi.org/events/automated-freight- summit?source=search-events AUTOMATED FREIGHT SUMMIT july 7-8 – virtual

Robothon june 22-24 – munich, germany & virtual

A robotics competition held during the automatica trade fair every two years, as part of munich_i, to showcase state-of-the-art methods in robotic manipulation. This year, the Robothon® will take place

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Commercial UAV Expo Americas 2021 is where the commercial drone community gathers to learn, connect, and drive the industry forward. In addition to content about new opportunities and challenges the industry is facing due to COVID-19, industries covered include Construction; Drone Delivery; Energy & Utilities; Forestry & Agriculture; Infrastructure & Transportation; Mining & Aggregates; Public Safety & Emergency Services; Security; and Surveying & Mapping. It is presented by Commercial UAV News and organized by Diversified Communications. https://www.expouav.com/ ENGINEER is the newest trade exhibition presented by C.I.S jointly organised with Malaysia’s official professional organisation for the engineering fraternity – The Institution of Engineers (IEM). This industry trade event is aimed towards providing engineering professionals in Malaysia and the region with an exciting and unique platform to gain an insight into cutting-edge solutions and advanced engineering technologies by international leading manufacturers. ENGINEER offers invaluable opportunities to network, collaborate and exchange ideas over the four-day event. https://engineermalaysia.com.my/ ENGINEER 2021 september 8-11 – malaysia 2021 Virtual Elevate AEC Conference & ElevateHER Symposium september 13 - October 8 Our annual ElevateAEC Conference & ElevateHer Symposium will be a four-week virtual experience with over 40 speakers and 30 credit hours of networking, learning, and celebrating – all in an unlimited virtual environment. With over 1900 registrants at last year’s virtual conference, we are excited to present an evolved and more interactive virtual platform where many can gather to elevate themselves, their firms, and the industry, all from the comfort of their home or office. From Project Manager to CEO, there is something for everyone at the 2021 ElevateAEC Conference and ElevateHer Symposium. https://www.zweiggroup.com/2021-elevate-aec-conference/ The International Association for Bridge and Structural Engineering (IABSE) is a scientific/technical Association comprising members in 100 countries and counting 56 National Groups. The aim of the Association is to exchange knowledge and to advance the practice of structural engineering worldwide in the service of the profession and society. Founded in 1929, IABSE hosted a series of Congresses every four years from 1932 to 2016 and every year from 2019. https://iabse.org/ghent2021 IABSE Congress Ghent 2021 september 22-24 – ghent, belgium

Elevating Doer-Sellers: Business Development for AEC Professionals july 7 – virtual Elevating Doer-Sellers: Business Development for AEC Professionals is specifically developed to help design and technical professionals in architecture, engineering, planning, and environmental firms become more comfortable managing clients and promoting the firm and its services. Led by two retired and current CEOs with extensive experience from the design desk to the board room, this one-of-a-kind seminar presents business development techniques proven to drive real growth and value in your AEC firm. https://shop.zweiggroup.com/collections/webinars/products/elevating- doer-sellers-business-development-for-aec-professionals-virtual- seminar-starting-april-4-2021?variant=38779972518039 Intelligent >Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45

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