TRACK I-C = SEWER CONSTRUCTION & REHABILITATION

jan-31

9:00-9:25 a.m.
Risk Management on Infrastructure Tunnel Projects
Speakers
Matt Koziol, P.E., Project Engineer, Schnabel Engineering
Description
Following a consent decree mandate by the EPA, the District of Columbia Water and Sewer Authority embarked on a $2.7 billion project to reduce Combined Sewer Overflows (CSOs) into the Potomac and Anacostia Rivers by 98%. Currently eight years into its 26-year schedule, the program involves a large network of tunnels, structures and other utilities. The program has been divided into separate contracts, each in a different stage of design or construction with varying procurement methods and multiple interfacing issues between them. Early on, program leaders determined that risk management would be of utmost importance to keep this “mega-project” on schedule, on budget, viewed in a positive light, safe, and effective. This presentation outlines the risk management process utilized for this project, summarizes the different types of risk analyses, explains the advantages of managing risk, and identifies decisions made as a result of the process.

koziolMatt Koziol, P.E., has seven years of professional experience in the tunneling and underground construction industry and has been working on the DC Clean Rivers Program as a risk manager and moderator for the past three years. He received his B.S. in Civil Engineering from Washington State University and M.S. in Civil Engineering, specializing in Geotechnical Engineering, from the University of Washington.


9:30-9:55 a.m.
Unique Methods to Rehab Both Ends of the Spectrum
Speaker
Rick Gage, Vice President Sales, LMK Technologies
Description
Mainline pipes and their lateral connections vary in sizes. Therefore, there is a need for a variety of trenchless rehabilitation techniques that complement each situation. This presentation focuses on the challenges and solutions of renewing the connections in 6” and 27” or greater mainline pipes without digging. Small-diameter mainline pipes have always been challenging.  These repairs are very similar to the installation methods practiced in ASTM F2599. The mainline tube and lateral tube are simultaneously inverted as a one-piece, main-to-lateral connection utilizing molded hydrophilic gaskets. Until now, standard and repeatable trenchless rehabilitation solutions have not been available to adequately repair large diameter pipes and their connections to the lateral. The finished product provides a water-tight connection by utilizing molded, hydrophilic gaskets.


10:00-10:25
Los Angeles Cost-Effective Urgent Repair Contract
Speaker
Salem Garawi, P.E., Civil Engineer, LA Bureau of Engineering
Description
The city of Los Angeles maintains the largest wastewater collection system in the United States with over 6,700 miles of sewer. Many of the pipes are old and in need of urgent repair. The Super Expedited Wastewater Emergency Rehabilitation for Sewers (SEWERS) contract is a unit price contract for the urgent repair of damaged sewers ranging up to 24” in diameter through the establishment of a list of pre-qualified, on-call contractors. The SEWERS program issues over 200 construction orders per year, repairing 8 miles of sewer pipes for a construction amount of $5 million per year. This contract has allowed for making timely, cost-effective repairs to keep the wastewater collection system operational. This presentation will focus on how the SEWERS contract is developed and implemented.

garawiSalem Garawi, P.E., has over 25 years of experience with the City of Los Angeles. Currently he is the project/construction manager of the Super Expedited Wastewater Emergency Repairs for Sewers Program (SEWERS), as part of the Wastewater Conveyance Construction Division (WCCD) in the Bureau of Engineering. The SEWERS program issues over 200 construction orders per year repairing 8 miles of sewer pipes for a total of $5 million.


10:30-10:55 a.m.
One-Voice for Sewer Condition Assessment Data
Speakers
Phil Lewis, Ph.D., P.E., Assistant Professor; Hossein Khaleghian, Doctoral Candidate; and
Yongwei Shan, Ph.D., P.E., Assistant Professor; Oklahoma State University
Description
Although there are widespread claims that the nation’s sewer infrastructure is failing, these claims are often undocumented except in the region where the sewer is located. There is a need for a national inventory to publicly present empirical data that accurately represents the condition of sewer systems. The benefits of such an inventory include: empirical data to justify increased spending on failing infrastructure; benchmarks of the national sewer infrastructure by region; identification of deterioration mechanisms in sewers; and a means for national dissemination of the data. This session reports on collaboration between Oklahoma State University, the National Association of Sewer Service Companies (NASSCO), and several sewer industry consultants to develop a unified inventory of sewer pipeline condition assessment data called One-Voice, addressing its strengths, weaknesses, opportunities and threats.

shanYongwei Shan, Ph.D., P.E., is an assistant professor in the School of Civil and Environmental Engineering at Oklahoma State University, with research interests in data management for infrastructure assets; data analytics for asset management; and construction productivity, workforce and emerging technology. He earned his Ph.D. from the University of Colorado, M.S. from the University of Kentucky, and undergraduate degree from Chongqing University in China.


11:00-11:25
Interceptor Design Challenges Working Around Buried Utilities
Speakers
Chris Brooks, P.E., Senior Project Manager; and Amanda Gentry, EIT, Engineer II; RJN Group Inc.
Description
Large-diameter gravity sewer interceptor design presents a variety of challenges for the design engineer, the greatest of which is working around buried utilities. This process becomes more difficult every year due to aging infrastructure, urbanization, community revitalization efforts, and unforeseen things like the natural gas exploration (fracking) boom in Dallas-Fort Worth. Unfortunately, information about these high-pressure gas lines can be uncertain, difficult to find or unavailable due to industry mergers and other circumstances. All of this makes utility coordination of sewer designs even more challenging and poses significant liability issues for the design engineer ultimately responsible for designing around or relocating these valuable gas mains. This presentation will discuss real-world examples of how such underground conflicts can be managed, mitigated or avoided.

amanda-gentryAmanda Gentry is a civil engineering graduate with a degree focused on environmental engineering. At RJN Group Inc. she has provided a variety of design support services for wastewater collection improvements involving large- and small-diameter pipelines, as well as small-diameter water line design and existing infrastructure condition assessment. Her experience includes evaluations for capacity improvements, utility locates and research, and preparation of plans and specifications for wastewater collection system facilities.


11:30-11:55 a.m.
Cost-effective Structural Culvert Point Repair
Speaker
Will LeBlanc, Global Sales Manager, HammerHead Trenchless Equipment
Description
Cured-in-place-pipe (CIPP) spot repair offers an alternative, permanent solution to culvert replacement, even for culverts with deteriorated inverts and joint separation. CIPP can also offer significantly better economy in some culvert remediation jobs. A CIPP culvert repair typically consists of a composite lining formed in place from one or more bands of fiberglass material impregnated with silicate resin. The technique is appropriate for all round and oval culverts of a variety of materials, including clay, concrete, steel, cast iron, stone, corrugated metal and plastic. The presentation also features a case study of a railroad culvert cleaning, repair and replacement contractor who used the CIPP repair method to renovate culverts for a railway located in Anchorage, AK.


TRACK 1-D


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