Underground Infrastructure - July 2023 - 9

" This legislation will increase the capacity of
our entire water system in the (Las Vegas) valley
while protecting our unique ecosystems and the
residents and businesses in Henderson, " Cortez
Masto said in a statement.
Federal funds are not part of the $2.5 billion
project cost, and construction is not expected to
begin for at least two years, said Bronson Mack,
water authority spokesman. Construction is not
expected to disturb the desert surface, although
survey work would be conducted.
Southern Nevada water users will fund the
work, Mack said, and the approximate 40-mile
pipeline won't increase the amount of water
the region draws from the drought-depleted
Lake Mead reservoir behind Hoover Dam. The
Las Vegas area, in the Mojave Desert, is home
to 2.4 million residents and attracts some 40
million visitors per year. It is almost completely
dependent on water from the Colorado River.
San Francisco Gets $369 Million
Loan for Stormwater
Infrastructure Upgrades
San Francisco officials and the U.S.
Environmental Protection Agency announced
a loan worth $369 million through the Water
Infrastructure and Innovation Act to improve
storm drains and other infrastructure in the city.
Transporting wastewater and stormwater
flows to treatment facilities will become more
efficient with improvements to pump stations.
Developments include construction of the new
Treasure Island Wastewater Treatment Plant to
meet future water demands.
The funding comes on the heels of storm
drain system failures last winter. The loan will help
the city fund " resiliency projects " to relieve areas
prone to flooding with stormwater upgrades.
SFPUC will " modernize aging wastewater and
stormwater infrastructure to enhance seismic
resiliency, " according to television station KRON4.
Companies Reach
$1.18 Billion Deal to Resolve
PFAS Pollution Complaints
Three chemical companies said they had
reached a $1.18 billion deal to resolve
complaints of polluting many U.S. drinking
water systems with potentially harmful
compounds known as PFAS.
DuPont de Nemours Inc., The Chemours Co.
and Corteva Inc. said they would establish
a fund to compensate water providers for
contamination with the chemicals used
widely in nonstick, water- and grease-resistant
products, as well as some firefighting foams.
Oefner Provides Updates on Houston Wastewater Program
Daniel Oefner, ENV SP, P.E.,
Assistant Director for Wastewater
Operations at the city of Houston,
was the guest speaker at the
Underground Construction
Technology Association's Gulf
Coast Chapter luncheon on June 7
at Maggiano's Little Italy, Houston.
About 100 people gathered at
the bi-monthly networking and
informational luncheon.
Starting out with an overview of
LEFT: Daniel Oefner, Assistant Director for Wastewater
Operations, City of Houston. RIGHT: About 100 people
attended the UCTA's Gulf Coast Chapter luncheon on June 7.
the Houston system, Oefner said that 70.97 percent of piping material was plastic and 29.03
percent consisted of non-plastic materials including concrete. He stressed that the goal of the
wastewater department was to provide relief for customers within 24 hours.
Oefner related that the EPA Consent Decree that Houston is operating under started in 2021
and is in effect until 2036. Part of that agreement requires the city to assess its entire system
within 10 years. That includes 6,200 miles of gravity force mains and 129,600 manholes.
He pointed out that Houston is aggressively attacking sanitary sewer overflows (SSOs). " We
are striving to stop SSOs before they happen. " Part of that strategy involves the installation of
3,000 new smart monitors to date with more on the way.
Oefner said the department is committed to the remediation of structural deficiencies of
category four or five as defined by the NASSCO Pipeline Assessment and Certification Program.
He added that as far as challenges facing the city, " supply chain and materials are still an
issue, but staffing remains the bigger issue. " UI
FOR MORE INFORMATION:
UCTA, uctaonline.org
Described as " forever chemicals " because
they don't degrade naturally in the environment,
PFAS have been linked to a variety of health
problems, including liver and immune-system
damage and some cancers.
The compounds have been detected at
varying levels in drinking water around the nation.
The Environmental Protection Agency in March
proposed strict limits on two common types,
PFOA and PFOS, and said it wanted to regulate
four others. Water providers would be responsible
for monitoring their systems for the chemicals.
The agreement would settle a case involving
a claim by Stuart, Florida, one of about 300
communities that have filed similar suits
since 2018 against companies that produced
firefighting foam or the PFAS it contained.
DOE Progresses on
Underground Ventilation Shaft
at Nuclear Repository
The U.S. Department of Energy says it's making
progress on a new ventilation shaft at the
nation's only underground nuclear repository
that will allow the facility to ramp up operations
as it disposes of tons of waste from decades of
research and bomb making.
Contractors dug more than a third of a mile
into the New Mexico desert to build the shaft
and were about 250 feet from reaching the final
depth in mid-June.
Ventilation at the Waste Isolation Pilot
Plant has been an issue since 2014, when a
radiation release contaminated parts of the
underground facility and forced an expensive,
nearly three-year closure.
Carved out of a salt formation, the
subterranean landfill located outside of Carlsbad
received its first shipment of radioactive waste
in 1999. The idea is that the shifting salt will
eventually entomb the waste.
Officials said about 13,000 yards of concrete
were used to line part of the new utility shaft,
while the remainder will be lined with steel
mesh and bolts to keep the salt walls in place.
The work involves geological mapping, drilling
and blasting before all the material is excavated
to make way for the shaft.
Officials said the whole ventilation system is
expected to be done by mid-2025. UI
UndergroundInfrastructure.com | JULY 2023 9
http://www.uctaonline.org http://www.UndergroundInfrastructure.com

Underground Infrastructure - July 2023

Table of Contents for the Digital Edition of Underground Infrastructure - July 2023

Underground Infrastructure - July 2023 - 1
Underground Infrastructure - July 2023 - 2
Underground Infrastructure - July 2023 - 3
Underground Infrastructure - July 2023 - 4
Underground Infrastructure - July 2023 - 5
Underground Infrastructure - July 2023 - 6
Underground Infrastructure - July 2023 - 7
Underground Infrastructure - July 2023 - 8
Underground Infrastructure - July 2023 - 9
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Underground Infrastructure - July 2023 - 52
https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-november-2023
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https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-august-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-july-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-june-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-may-2023
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https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-march-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/underground-infrastructure-february-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/january-2023
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