Underground Construction - December 2017 - 40

EDUCATION
9-9:25 a.m.
Sioux City Uses HDD to Install Twin 36" Casings for
Sewer Siphons
Speaker: David Reuter, P.E., Vice President of
Sales-Western Region,
Underground Solutions Inc.
The city of Sioux City, IA, faced multiple challenges in
relocating its sanitary, double-barrel, inverted siphon
to make way for expansion of Interstate I-29. It had to
cross beneath an urban arterial, three Union Pacific
Railroad spur tracks, an industrial manufacturer and
a river flanked by a levee on each side, all at once,
with minimal disruption, and in a time-efficient and
cost-effective manner. The answer was HDD: 800-foot
separate entry and exit connection points at 60-foot
installation depth. A 330,000-pound thrust/pullforce
maxi rig installed twin 36" diameter casings, with nested 24" and 30" carrier pipes - all fusible PVC pipe.
9:30-9:55 a.m.
Los Angeles Sewer Repair is Sensitive to
Residents' Concerns
Speaker: Ronald Rugamas, P.E., Civil EngineerWastewater Conveyance Construction,
City of Los Angeles Department of
Public Works
The City of Los Angeles' Secondary Sewer Renewal
Program successfully rehabilitated secondary sewer

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pipes (6" to 15" in diameter) on public right-of-way using open-trench method (R&R) and/or cured-in-place
liners. In 2016, the city completed two pilot projects
under the program, encountering the new challenge of
repairing sewers located on easements within private
properties. This presentation will share the lessons
learned in interacting with the local community to
facilitate the goal of improving and maintaining the
city's sewer infrastructure, while being sensitive to
residents' concerns.
10-10:25 a.m.
Substitute Service Line Improves Health, Safety of
Houstonians
Speaker: Daniel Oefner, P.E., M. ASCE, Supervising
Engineer, City of Houston-Public Works
This presentation will explore details of the unique
program developed by the City of Houston to improve
the health, safety and welfare of citizens. A few years
ago, it established the Substitute Service Line Program
to respond to failing backlot public underground
infrastructure that posed severe maintenance challenges due to a lack of recorded easements, building
encroachments, adherence to now-outdated standards
and other reasons. Instead of continuing with expensive, reoccurring maintenance costs that often did not
address the root cause, a proactive approach reroutes

private utilities to public right-of-ways, allowing older
utilities to be forever abandoned.
10:30-10:55 a.m.
Valley Forge, PA, Thermoplastic Rehab of 18,000 LF
Pipeline
Speaker: Sean Borris, Project Manager,
United Pipeline Systems
When a pipeline suffered three major failures near Valley Forge, PA, protected waterways were contaminated,
requiring immediate repair or replacement. Assessment
of the force main determined that external corrosion
had degraded the strength of the wire rope inside the
40-year-old, 30", pre-stressed concrete cylinder pipe,
rendering it unable to handle the system's operating
pressure. The presentation will provide an overview
of the repair method - thermoplastic close-fit lining
system - chosen for the 18,000-LF project. Running
through a national park, historic site and protected
habitats, plus crossing the Schuylkill River, the emergency rehabilitation required support and cooperation
of several different entities.
11-11:25 a.m.
First Major Pilot Tube Project in the Detroit Area
Speaker: Steve Matheny, P.E., Logan Clay Products
Because minimizing impact and maintaining traffic

Underground Construction December 2017
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Underground Construction - December 2017

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