Underground Construction - July 2019 - 33

lines. Other options, such as sliplining,
were also considered. Sliplining was ruled
out due to the amount of flow capacity that
would be lost as a result of a large reduction in the inside diameter. In addition, the
number of bends in the pipeline were not
ideal for a sliplining solution.
Shahrzad Tavana, senior engineer
with the city of Plano, explained that "we
chose CIPP due to the minimal disruption
it would cause to the environmentally
sensitive White Rock Creek area."
As low bidder on the project, Insituform
was chosen in August 2016 to do the work
using its flagship CIPP process. Insituform
is the originator of the CIPP process,
with its first installation taking place in
the UK in 1971.
"We felt comfortable choosing
Insituform as the contractor based
on its longevity in the industry and
recommendations from neighboring
municipalities," Tavana added.

Project overview
According to the city, the work was
performed at two locations generally
identified as White Rock Creek and Prairie
Creek after the two nearby creeks. The
White Rock Creek portion of the job ran
from Spring Creek Parkway to Plano
Parkway and consisted of approximately
16,300 feet of 24- to 36-inch sanitary
sewer interceptor.
Adjacent to this first portion was 1,000
feet of an 18-inch sewer main running
parallel to Plano Parkway, 450 feet of 15inch sewer main and another 150 linear
feet of 15-inch sewer main. The Prairie
Creek portion of the project consisted of
approximately 2,500 feet of 21-inch sewer
main located along the banks of Prairie
Creek continuing downstream. In total,
the project included 19,984 feet of sewer
main rehabilitation.
About half of the project ran directly
through the very exclusive Gleneagles
Country Club. Work running through the
club's 36-hole golf course brought several
challenges. First, two special access roads
had to be built for equipment access in
order to prevent damage to the greens and
fairways. Additionally, most of the work
had to be done within a six-month period
due to the requirements of the golf course.

Other tricky setups included nonconventional pipe dispersion structures
running under a drainage channel and
location of manholes next to tee-boxes
on the golf course. The clean and TV
(CCTV) company, Nezat Training, cleaned
up to 5,000 feet at a time directly next
to the golf course without having to be
on the premises.
In addition to the challenges presented
by work on the golf course, the contractor
also had to deal with three separate HOA
groups, work delays due to rain and had to
coordinate with a North Texas Municipal
Water District Lift station.
Insituform received a notice to proceed
on Oct. 25, 2016, with an agreement
that the work would be done within 300
calendar days. The golf course work could
only be done during the off-season from
November to February, with allowances
for restoration and other minor items up
through March and April. The contractor
completed the rest of the work within the
allowed timeframe by mid-2017.
Before the work could proceed, the line
had to be completely bypassed. Running
straight through the golf course, the bypass
was anchored off next to the creek in order
to keep it out of the fairway. Bypass work
was done by Maverick Pump.
Once the bypass was setup, the CIPP
tubes were wet-out at an Insituform
facility in McGregor, Texas. The tubes
were kept in a refrigerated truck for the
two-hour drive to prevent premature
exotherm and delivered straight to the
job site for installation.
Accessibility on the job site was the
primary issue for completing the job in
the allowable time and making sure that
all stakeholder concerns were addressed.
In addition to access roads capable of
supporting fully loaded 18-wheel tractor
trailers, the contractor had to build a
scaffold system from an adjacent road
off the side of a bridge at two separate
locations due to limited access. This
helped the crew perform an installation
on a concrete-lined drainage channel on
the golf course, as well as an installation
off a bridge adjacent to one of the busiest
streets in Plano. Another installation shot
required manhole access in a bunker on the
18th green of the Queens Course.

Gleneagles Golf Club was playable for
the entire project duration. Minimal
restoration of the golf course was required
and performed by a subcontractor that had
developed a working relationship with the
golf course over the years. The city of Plano
and Gleneagles Golf Club were pleased with
the effort provided by the engineer and
contractor to minimize adverse impacts
during construction.
The entirety of the project was
completed in 22 separate installation
shots, most of which used the traditional
water inversion and water-cure
installation process. Four of the lines
were rehabilitated using Insituform's
air-inversion steam-cure (AISC) method to
help cut down on water usage and provides
a quicker cure for shorter segments.
Many of the shots measured more
than 1,000 feet in length, and the longest
installation on the project ran more than
1,500 feet. Rehabilitation of the access
manholes using CIPP was performed
concurrently with the Insituform CIPP
installations by Infrastructure Rehab USA
out of Shreveport, Louisiana.

Conclusion
The project was completed ahead of schedule
by mid-summer 2017. The bypass was
removed, and the lines were back in service
shortly thereafter. The success of this project
was predicated on the ability to manage risk
associated with providing the appropriate
rehabilitation method, along with sufficient
installation access while mitigating impact
in a difficult golf course location.
The project is a prime example of
the benefits that can be realized, even
on difficult projects, when the owner,
engineer and contractor work together
throughout all phases.
Tony Almeida, P.E., Halff & Associates
added, "The project challenges were
unique, but what amazed me was how all
of the stakeholders on this project came
together in a spirit of cooperation to make
this project a success." *
FOR MORE INFORMATION:
Halff & Associates, (214) 346-6200, halff.com
Insituform, (636) 530-8000,
aegion.com/about/our-brands/Insituform
Nezat Training, (281)788-5221, nezat.com
Infrastructure Rehab USA,
(888) 277-5485, irehabusa.com
UConOnline.com | JULY 2019

33


http://www.halff.com http://www.aegion.com/about/our-brands/Insituform http://www.nezat.com http://www.irehabusa.com http://www.UConOnline.com

Underground Construction - July 2019

Table of Contents for the Digital Edition of Underground Construction - July 2019

Contents
Underground Construction - July 2019 - FC
Underground Construction - July 2019 - IFC
Underground Construction - July 2019 - Contents
Underground Construction - July 2019 - 4
Underground Construction - July 2019 - 5
Underground Construction - July 2019 - 6
Underground Construction - July 2019 - 7
Underground Construction - July 2019 - 8
Underground Construction - July 2019 - 9
Underground Construction - July 2019 - 10
Underground Construction - July 2019 - 11
Underground Construction - July 2019 - 12
Underground Construction - July 2019 - 13
Underground Construction - July 2019 - 14
Underground Construction - July 2019 - 15
Underground Construction - July 2019 - 16
Underground Construction - July 2019 - 17
Underground Construction - July 2019 - 18
Underground Construction - July 2019 - 19
Underground Construction - July 2019 - 20
Underground Construction - July 2019 - 21
Underground Construction - July 2019 - 22
Underground Construction - July 2019 - 23
Underground Construction - July 2019 - 24
Underground Construction - July 2019 - 25
Underground Construction - July 2019 - 26
Underground Construction - July 2019 - 27
Underground Construction - July 2019 - 28
Underground Construction - July 2019 - 29
Underground Construction - July 2019 - 30
Underground Construction - July 2019 - 31
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Underground Construction - July 2019 - 33
Underground Construction - July 2019 - 34
Underground Construction - July 2019 - 35
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Underground Construction - July 2019 - 40
Underground Construction - July 2019 - 41
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Underground Construction - July 2019 - 49
Underground Construction - July 2019 - 50
Underground Construction - July 2019 - IBC
Underground Construction - July 2019 - BC
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