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Progress Continues On $250M Columbus LOT Project
The microtunneling boring machine (MTBM) is lowered into the Gowdy shaft for Columbus, Ohio’s Lower Olentangy project.
By Cindy Riley CEG CORRESPONDENT
Currently more than two-thirds complete, Columbus, Ohio’s Lower Olentangy Tunnel project (LOT) is designed to minimize the amount of sewage that overflows into the Olentangy River during flooding. The $250 million undertaking includes a main tunnel of approximately 17,000 ft. of 12-ft. diameter tunnel, at an average depth of 50 ft. This portion is mined with a tunnel boring machine (TBM) and constructed of precast concrete segments.
“Delivering a project of this size requires continuous, close coordination between all parties to effectively complete the work and navigate any issues that may arise,” said Jeremy Cawley, project manager of the city of Columbus Division of Sewage and Drainage (DOSD). “We are very fortunate to have, and greatly appreciate, the high level of sharing, cooperation and commitment provided by all the firms involved.”
The city of Columbus is under two Ohio Environmental Protection Agency consent orders to improve water quality and reduce the potential for human contact with waterborne pollutants by reducing combined sewer overflows and sanitary sewer overflows into creeks and rivers during wet weather events. Granite Construction serves as the prime contractor on the project, while Black & Veatch is responsible for construction management and inspection services, overseeing and monitoring all aspects of the work.
In addition, Delve Underground is a sub-consultant to DLZ, which is the prime design consultant responsible for the overall design delivery. Delve’s duties included assistance with the design of the tunnel and shafts on the project.
According to Cawley, construction is going well.
“Granite completed the mining of the southern portion of the main tunnel from Gowdy Field to Vine Street, which is approximately 5,000 linear feet, and is continuing with the construction of all associated shafts. They are mining the northern reach of the main tunnel and have completed 5,500
linear feet to date. They also are working on the deep rock connector tunnel to the existing OARS tunnel and have finished the mining of the 1,100 linear feet, 90-inch micro-tunnel to the 2nd Avenue site, as well as the jet grouted safe havens along the alignment.”
The Gowdy shaft, which is the TBM launch location, was constructed via slurry wall panels and has a figure-eight shape.
Clint Wilson/Black & Veatch photo
Clint Wilson/Black & Veatch photo Gowdy shaft construction
Cleveland Browns, Partners to Expand Footprint in Berea
District 46, a mixed-use neighborhood adjacent to the CrossCountry Mortgage Campus, will be developed by Ohio-based DiGeronimo Companies and will include a community field lined for multiple sports for youth, high school and adult participation.
Plans include 30,000 sq. ft. of retail space to support the new pedestrian-friendly neighborhood.
Berea City Schools, the city of Berea, DiGeronimo Companies, Haslam Sports Group and University Hospitals are teaming up on the creation of District 46 at CrossCountry Mortgage Campus. An expansion of the existing footprint of the Cleveland Browns in Berea, this new neighborhood will be more than 16 acres and utilized for a variety of spaces benefiting the region with an anticipated opening in early 2027.
District 46, a mixed-use neighborhood adjacent to the CrossCountry Mortgage Campus, will be developed by Ohio-based DiGeronimo Companies and will include a community field lined for multiple sports for youth, high school and adult participation; an upscale hotel that will be developed in partnership with Crawford Hoying and operated by Shaner Hotel Group; a sports medicine facility operated by the team health-system partner, University
Hospitals (UH); market-rate apartments; a field house for community use; a parking garage; and 30,000 sq. ft. of retail space to support the new pedestrian-friendly neighborhood.
“The city of Berea and Mayor Kleem have been incredible partners to us at the Browns and the Haslam Sports Group, and we’re thrilled to work with them on this expansion project that will benefit so many members of our neighborhood,” said David Jenkins, Haslam Sports Group chief operating officer. “We’re thrilled to be working with local developer DiGeronimo and additional partners University Hospitals and Berea City Schools on District 46 at CrossCountry Mortgage Campus and know this development will be transformative for this community.”
“On behalf of the city of Berea, we’re excited to deepen our existing working relationship with the Haslam and
Johnson families as well as the Cleveland Browns as we begin to create District 46,” said city of Berea Mayor Cyril Kleem. “For our residents and our community, these new spaces will continue to enhance all our city has to offer and will bring new opportunities for growth that we're extremely excited about.”
“We’re proud to work with the Cleveland Browns and the city of Berea on this incredible project which will be transformational for the area,” said Vic DiGeronimo Jr., DiGeronimo Companies chief executive officer. “With so many great partners involved in District 46 from the northeast Ohio region, we’re thrilled to help bring this vision to life and see the positive impact it will have for years to come.”
More development plans will be released in the months to come.
AES Ohio Powers Economic Development With Major Upgrades
AES Ohio, a subsidiary of The AES Corporation, is embarking on a transformative journey to enhance the region’s infrastructure, paving the way for economic development and community growth. This initiative includes a facility that will improve the capacity and reliability of electric service in Fayette County and the entire AES Ohio transmission system.
At the heart of this project is a $175 million investment near the new L-H Battery Company (a joint venture between LG Energy Solutions and Honda) site, representing the most significant construction project for AES Ohio in three decades. This project includes the installation of 13.5 mi. of new transmission lines and a new substation, critical for supporting the expansion in Fayette County and beyond.
“Our collaboration with the L-H Battery Company is not just about enhancing infra-
structure — it’s about empowering communities, creating jobs and leading the charge toward a sustainable, electrified future,” said Tom Raga, president of AES Ohio. “We are
proud to be at the forefront of this transformative era for Ohio.”
AES Ohio began delivering power to the LH Battery Company site Aug. 1, 2024, and by
Oct 11, the project hit a major milestone, transitioning from one project team to another, in the first step toward completion of Phase 1.
The project has three phases aimed at improving the grid’s reliability and resilience. Phase 1 is nearing completion, which is scheduled for the end of 2024. The Fayette substation has two 345 kV lines and uses two transformers to supply the L-H Battery Company.
Phase 2 involves constructing a new Jeffersonville substation, replacing the existing substation with completion expected by 2026.
Phase 3 plans include building a new Octa substation and linking it with the Fayette and Jeffersonville substations, further enhancing reliability of the area. This phase is slated for completion in 2028.
For more information, visit aesohio.com/transmission-improvements.
Haslam Sports Group rendering Berea City Schools, the city of Berea, DiGeronimo Companies, Haslam Sports Group and University Hospitals are teaming up on the creation of District 46 at CrossCountry Mortgage Campus.
Haslam Sports Group rendering
Haslam Sports Group rendering
Ohio University Announces Investment From Kokosing
Ohio University received a significant investment from Kokosing Inc., which will support facilities and educational resources for experiential learning in construction management at the Russ College of Engineering and Technology.
In recognition of their generosity and vision, Ohio University will name the laboratory located in room 116 of the Charles R. and Marilyn Y. Stuckey Academic and Research Center as The Kokosing Teaching Laboratory. This investment will help continue to develop the facility, which serves as a hub for hands-on learning and student projects in construction management education.
“This investment from Kokosing not only supports the future success of our students but also strengthens the foundation of industries that drive our nation’s infrastructure,” said Ohio University President Lori Stewart Gonzalez. "We are grateful for their generous support, which enhances our ability to offer students hands-on learning experiences that are critical for thriving in today’s construction industry.”
The Kokosing Teaching Laboratory will serve as a focal point for real-world student projects, positioning the college to explore future developments to meet evolving industry needs. The lab will provide students with invaluable experiences on large-scale construction projects, such as highway infrastructure, foundation slabs, bridges and buildings, allowing them to apply classroom knowledge to practical, industry-relevant projects.
“We are honored and grateful for Kokosing's generous support, which will be instrumental in delivering practical, highquality experiential learning for our students,” said Russ College of Engineering and Technology Dean Patrick Fox. “This investment will help us prepare graduates to meet the needs of a rapidly changing con-
struction sector, which is critical to the growth and infrastructure of our region.”
Kokosing Inc., a third-generation, familyowned company based in Westerville, Ohio, is one of the largest contractors in the Midwest and Mid-Atlantic regions. Recognized for its expertise in tackling complex construction challenges, Kokosing brings a wealth of experience across a wide range of projects, including water/wastewater treatment, industrial manufacturing facilities, transportation infrastructure, power generation, marine and more.
“We are humbled to be able to support Ohio University and the Bobcat students through the naming of The Kokosing Teaching Laboratory facility,” said Kokosing co-CEO Bryce Burgett. “When we first heard of Ohio University’s plan to create a student project makerspace to serve as the foundation of Russ College’s construction management offerings, we were excited to pay it forward by supporting students looking to join the construction industry. Thank you to our OU alumni team members who have made significant contributions to Kokosing during their careers.”
This partnership aligns with Ohio University’s strategic priorities of fostering industry collaborations that enhance student learning and workforce development in critical sectors like engineering and construction.
The Kokosing Teaching Laboratory will continue to play a vital role in preparing Ohio University students to meet the future needs of the construction industry. As the industry evolves with new technologies, sustainability practices and innovative building techniques, this laboratory will equip students with the practical experience necessary to excel in this dynamic field, paving the way for them to become future construction leaders, the university said.
Ohio University photo
The Charles R. and Marilyn Y. Stuckey Academic and Research Center
ODOT Updates Blaine Hill Arches of Memory Rehabilitation Project
The Ohio Department of Transportation (ODOT) Blaine Hill Arches of Memory Rehabilitation Project will rebuild the historic U.S. Route 40 bridge in Belmont County, Ohio. The project includes enhancements to the structural integrity by replacing the superstructure and maintaining the bridge’s historical character, all to facilitate the bridge’s reopening.
The design plans for this vital project are in development. Michael Baker International is the firm designing it. ODOT anticipates construction to begin by 2027 but is actively working with the design firm to accelerate plan development.
Although funding is secured for this project, ODOT has submitted a grant application to the Bridge Investment Program for the Blaine Hill Bridge rehabilitation project for additional funding support. The Bridge Investment Program is one of the many available grants within the United States Department of Transportation’s Bipartisan Infrastructure Law.
“ODOT prioritizes safety above all else. We recognize that the closure is inconvenient for those living and working in the area and are making every effort to expedite the project,” said Tom Corey, ODOT District 11 deputy director “We want to ensure this work keeps this vital bridge in service to our community for decades to come.”
The Blaine Hill Viaduct is crucial in connecting the local communities of Blaine, Boydsville, Lansing and Brookside. Rebuilding the bridge will restore connectivity for these communities and provide mobility options for local and regional freight and vehicular demand while preserving the historic bridge for future generations.
Preserving the bridge’s historical value while modernizing its function is critical to the project. The project will integrate durable materials such as advanced concrete sealants and resilient design elements that extend the bridge’s lifespan and protect its architectural integrity. These decisions will align with broader regional goals of maintaining vital infrastructure while respecting historic preservation.
Vantage Selects Turner Construction Corp. for $2B Expansion Project
Turner Construction Company has begun work on a $2 billion project to expand Vantage Data Centers’ campus in New Albany, Ohio. The start of construction was celebrated with a groundbreaking ceremony attended by representatives from Vantage, Turner and leaders from local organizations. The campus is Vantage’s first project in the Midwest and will provide secure and reliable infrastructure for cloud technologies and artificial intelligence. Situated on 70 acres, the data center will provide 192 megawatts of capacity across more than 1.5 million sq. ft. It will be built in alignment with Turner and Vantage’s sustainability goals and will seek to achieve LEED Silver accreditation. The campus will be included in Vantage’s commitment to achieving net zero operational carbon emissions by 2030 across its global portfolio.
“We are excited to work with Vantage on this significant project,” said Matt Kunz, vice president and general manager, Turner Construction Company. “More than $2 billion will be invested in the campus over the next few years as they meet the need for the increased demand for scalable and sustainable digital infrastructure in the region. We are looking forward to working with Vantage and the local community on the project.”
“We’re excited to add the Buckeye state to our growing North America platform. Ohio is a strategic market for us and our hyperscale customers, and we appreciate the warm welcome we’ve received from business, government and community leaders,” said Dana Adams, president, North America of Vantage Data Centers. “Our investment in New Albany will further strengthen the state’s economy and its reputation as a hub for technology and innovation, and we look forward to being a collaborative partner here in central Ohio.”
The first building will be opened in 2025.
ODOT photo
Built in 1932, the reinforced concrete bridge consists of four iconic arch spans. ODOT closed the bridge in 2024 due to substantial deterioration, including significant leaking and cracking on the deck and damage to the columns and concrete structure.
ODOT photo
Although funding is secured for this project, ODOT has submitted a grant application to the Bridge Investment Program for the Blaine Hill Bridge rehabilitation project for additional funding support.
ODOT photo
Michael Baker International is the design firm. ODOT anticipates construction to begin by 2027 but is actively working with the design firm to accelerate plan development.
Vantage photo
The start of construction was celebrated with a groundbreaking ceremony attended by representatives from Vantage, Turner and leaders from local organizations.
Vantage rendering
Turner Construction Company has begun work on a $2 billion project to expand Vantage Data Centers’ campus in New Albany, Ohio.
LOT Will Improve Water Quality, Reduce Pollutants
LOT from page 1
“This was done in order to provide flexibility during construction and required dual launches of the TBM,” Cawley said. “The contractor completed the southern section of the tunnel first, to potentially allow flow to that portion of the tunnel while they continue construction of the northern section, should issues arise during that piece. This would allow the city to still meet the date requirements of their CSO consent order while the other work is finished.”
Work began in 2021, with substantial completion scheduled for the end of September 2026.
“The main challenges for this project are and have been controlling the ground and successfully creating the intervention safe havens via the jet grouting process,” said Cawley. “The soft ground geology in Columbus varies widely, and has a large number of cobbles, boulders and gravel which make it very challenging to mine. Because of this, the contractor has to monitor the ground conditions and muck continuously in order to adjust methods and additives to prevent surface settlement and clogging of the machine.”
see LOT page 9
Clint Wilson/Black & Veatch photo
The secant pile rig from Goettle drills at Vine Street.
Clint Wilson/Black & Veatch photo
The Gowdy shaft construction done by Keller.
Clint Wilson/Black & Veatch photo
The TBM was delivered to the site in November 2022.
Crews Due to Complete New Tunnel in September 2026
LOT from page 8
Key tasks remaining for crews include completion of the main tunnel; the deep rock connector tunnel; final build out of all the shafts; as well as the DSR 873 redirection jack and bore. Due to most of the work being subterranean, the weather hasn’t had a major impact.
Heavy machinery used on the project includes the new Herrenknecht 14-ft. 7-in. earth pressure balance TBM, specifically designed for the geology of this project and considered the most vital piece of equipment. The TBM was constructed at Herrenknecht’s main facility in Shwanau, Germany, and was shipped to Toledo, Ohio, via barge. From there it was transported by Edwards Moving and Rigging in three separate pieces to the Gowdy Field launch site. Setup and lowering of the machine into the shaft was assisted by an 800-ton Maxim crane.
The Herrenknecht AVN 2500 90-in. microtunnel boring machine also is being utilized, along with two HS-3180 Liebherr cranes; two Comacchio jet grout rigs; and smaller pieces of equipment.
The main tunnel materials required are the precast segmental tunnel liners being produced by CSI Concrete Systems in Macedonia, Ohio, and the 90-in. micro-tun-
neling pipe, which was produced by Rinker Materials in Columbus.
Cawley noted the hole through at Vine Street went according to plan. Granite slowed production to more safely excavate through the secant pile shaft walls and came in on line and grade. Work on the 36-in. relief sewer has been completed and was performed with a combination of traditional open-cut excavation and jack and bore methods.
Construction related to the connector tunnel is ongoing. Granite has completed roughly 30 percent of the rock excavation.
“The rock tunnel is approximately 170 feet below the surface, and is being constructed in karstic limestone,” Cawley said. “Due to the karst features, Granite is conducting phased grouting of the rock to control the water. The excavation is being completed via drill and blast, sequential excavation methods.”
While plenty of work remains, Cawley said he’s pleased with what’s already been accomplished, due to the talented team assembled to carry out the multi-year project.
“Getting to work alongside and learn from the professionals involved has been an absolute privilege. It’s also very rewarding to know this project will provide such a positive and long-lasting impact to the city and region as a whole.” CEG
Clint Wilson/Black & Veatch photo
The North Launch — a look down the constructed tunnel segments into the TBM from inside the Gowdy shaft.
Gov. DeWine Urges Ohioans to Consider Apprenticeships
The week of Nov. 18 marked the 10th anniversary of National Apprenticeship Week, and Ohio Gov. Mike DeWine, Lt. Gov. Jon Husted, Ohio Department of Commerce Director Sherry Maxfield, Ohio Department of Job and Family Services (ODJFS) Director Matt Damschroder, and Opportunities for Ohioans with Disabilities (OOD) Director Kevin L. Miller joined together in encouraging individuals seeking career opportunities to consider an apprenticeship.
“One of the ingredients of our economic success, innovation and growth in Ohio is our range of quality apprenticeship programs,” said DeWine. “Apprenticeships provide a
clear pathway to a great-paying, lifelong career. Ohioans who take on an apprenticeship earn money while they learn a new skill, they avoid student loan debt, and — when they complete their programs — they can even receive a nationally recognized credential.”
Ohio currently ranks third in the nation and first in the Midwest in the number of apprentices, with more than 23,000 enrolled in an apprenticeship program.
“Pre-apprenticeship and apprenticeship programs are incredibly valuable because they offer an earn-while-youlearn model that benefits both employers and employees,” said Husted. “Without the high cost of college, participants
gain hands-on skills, real-world experience and a paycheck instead of a tuition bill. It’s a winning solution that builds a skilled workforce without the burden of debt.”
Given Ohio’s rapid growth, workers in skilled trades are in high demand. Whether it be in construction, plumbing, HVAC, electric, welding, pipefitting or any other trades, these positions are highly sought after and offer competitive salaries — even at the apprenticeship level. After as few as five years as an apprentice, individuals in a trade often earn more than twice the state median income.
“Apprentices working in skilled trades provide us with places to live and places to work, which is particularly needed right now in Ohio because we are in an economic boom, where more businesses are moving into the state and the demand for residential housing keeps growing and growing,” Maxfield said.
In addition to being able to earn a competitive wage, young Ohioans in apprenticeships can receive hands-on training while avoiding student debt. If advanced education is desired, in many cases, employers will offer to pay for an individual to earn college credit toward an associate or bachelor’s degree available at many state colleges and universities.
ODJFS oversees ApprenticeOhio, which registers programs that meet national criteria for quality and safety. Each ApprenticeOhio program is run by a sponsor: usually an employer, a group of employers, or a labor/management committee. Apprentices earn wages while learning skills for a job in the sponsor’s industry. They complete at least 2,000 hours of structured on-the-job training and 144 hours of classroom training, typically at a local college or university.
“Apprenticeships are an especially great option for those exploring new careers, including veterans,” Damschroder said. “Ohio has more than 1,400 veteran apprentices. Some programs offer veterans advanced standing or credit hours for their military experience and training. In addition, eligible veterans can use their GI Bill benefits to help pay for books and supplies.”
November also marked Hire-a-Veteran Month in Ohio, Damschroder noted.
The Ohio Department of Commerce oversees a unique program to introduce high school students to real-world, hands-on experience that can lead to future apprenticeships.
The Manufacturing and Construction Mentorship Program allows 16- and 17-year-old students who are not part of an established technical education program to work in a manufacturing or construction setting with dedicated mentors.
Additionally, OOD’s Ohio Vocational Apprentice Program, which was launched in 2019 under the leadership of Gov. DeWine, creates inclusive pathways for Ohio students and adults with disabilities to gain important work experience and pursue careers in state government.
“OOD is committed to removing barriers to employment for Ohioans with disabilities,” Miller said. “By partnering with state agencies and private businesses, we establish apprenticeship programs that empower students and adults to gain valuable skills and thrive in the workforce.”
Ohio has more than 200 occupations that offer apprenticeships, in fields as diverse as construction,
