Underground Construction - December 2017 - 47

Underground Construction Technology
International Conference & Exhibition

Cities across the country are balancing growth and
other municipal needs with the investments required
to rehab and replace aging buried infrastructure. Utility
managers are dealing with increasing regulatory and
customer-service demands, plus funding limitations.
Utilities have employed asset management principals
to effectively lower life-cycle costs and improve system
performance. Three perspectives on these issues and
practices will be presented:
* Denton's mature bottom-up asset management
program that has all employees engaged in reducing
life-cycle costs and improving customer service.
* Houston's challenges in managing over 6,000 miles
of buried wastewater system assets.
* Developing a strategic asset management plan for
Laredo.

Track I-D
SEWER CONSTRUCTION & REHABILITATION
8:30-8:55 a.m.
Dealing With the Sinkhole Phenomenon
Speaker: Thomas Liu, P.E., Consulting Engineer,
Wood Group
The sinkhole phenomenon has become a common
scene in today's geological formation. To pipeline
operators, the sinkhole has detrimental effects on
transporting gas and liquid products, safety and economy. Added stress from pipe bending, overburden, pipe
weight and content must be considered. In addition,
internal and external loads can deform the pipeline
to a point of becoming inoperable and dangerous.
The clear span created within a sinkhole could easily
exceed the maximum allowable unsupported length.
End conditions are also critical parts of pipe stress. This
presentation will discuss these conditions and remedial
methods that allow the pipeline to continue operating.
9-9:30 a.m.
Fort Drum Rehabilitates Four Large Road-Supporting
Parallel Pipes
Speakers: Tom Perry, President, Multi Utilities
Ventures;
Ryan Arold, Vice President & Corporate
Secretary, Arold Construction Co. Inc.
A recent rehabilitation project at Fort Drum, NY,
a 25.4-square-mile U.S. military reservation and
census-designated place (CDP), focused on four, large,
parallel, 142"-by-91", arched CMP pipes that supported
a roadway over a trout stream, with 3" to 0" separation
between each barrel and a total span of 56.3'. A
centrifugally cast concrete pipe (CCCP) solution was
selected for the key arc elements. The design intricacies
and material properties ensured a structurally sound,
watertight, rehabilitated buried bridge structure that
meets the military loading classification (MLC) for
wheeled and tracked vehicle traffic.
9:30-9:55 a.m.
PCCP Problems, Potential Solutions in Sewer
Applications
Speakers: Brett Todd, Director of Sewerage, Jefferson
Parish Sewerage Department;
Robert Delaune, P.E., Vice President &
Principal Partner, Digital Engineering
This presentation will describe pre-stressed concrete
December 2017 Underground Construction

cylinder pipe (PCCP or Price Brothers) and the
challenges faced in previous and current sewer
applications in Jefferson Parish, LA. Also discussed will
be the approach to inspection of Price Brothers pipe
in sewer force main applications. This will include the
preparation and efforts required for inspection and the
different options for performing the work, along with
the advantages and disadvantages of each.

10-10:25 a.m.
Fort Worth's Low-Pressure Sewer System Extended
to Lake Worth Shores
Speakers: Clete Martin, P.E., Principal & Conveyance
Group Leader, Alan Plummer Associates Inc.;
Walter Norwood, P.E., City of Fort Worth
Lake Worth is the second-oldest drinking water supply
lake in Texas. The city is extending water and sewer
services to areas along its shores, where residential

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Underground Construction - December 2017

Table of Contents for the Digital Edition of Underground Construction - December 2017