Underground Construction - April 2018 - 33

asbestos cement pipes. PVC was
also the pipe material with the
lowest break rate in USU's 2012
study.
Corrosion can be a major
cause of water main breaks, with
75 percent of all utilities reporting corrosive soil conditions. This
study has shown that cast iron
pipe in a high-corrosion soil has
over 20 times the break rate of
one in a low-corrosion environment. Similarly, ductile iron pipe
in a high-corrosion soil has over
10 times the break rate of one in
a low-corrosion soil.

Findings
Other national benchmark findings of Folkman's study include:
* Nationwide, one mile of
installed water main serves
308 people.

* 85 percent of water pipes
are less than 12 inches in
diameter.
* The percentage of water mains
over 50 years old has increased
from 22 to 28 percent in the
past six years.
* Pipe material usage varies
significantly over geographic regions, suggesting pipe
selection and use is based on
historical preference versus
comparative cost analysis or
environmental conditions.
* Since 2012, the percentage of
installed water mains that are
beyond their useful lives has
doubled from 8 to 16 percent
* Cast iron (CI) pipes represent the largest pipe material
inventory, and 82 percent of
all CI pipes are more than 50
years old.

* Construction-related failures
were equivalent for both PVC
and ductile iron pipes, pointing to the need to improve
construction practices for
underground infrastructure
regarding installation, location
services and inspection.
* Conservation benchmarks
include a national drop in average supply pressure to 69 psi
(from 77 psi in 2012), which
is well below the maximum
operating pressure of water
mains, extending pipe life,
as well as reducing leaks and
breaks.
* Average daily gallons per day
per person is 137 which is
slightly less than in 2012 and
suggests successful water conservation efforts across the
country.

* Estimated average water loss
due to leakage is 10 percent,
showing that pressure reduction, leak detection and pipe
replacement have contributed
to reducing water loss in water
distribution systems.
This comprehensive study
contributes to the continuing
efforts of the EPA's Aging Water
Infrastructure (AWI) research,
Virginia Tech's Sustainable
Water Infrastructure Management (SWIM) Program, the U.S.
Conference of Mayors' Water
Council, and the asset management and water infrastructure
condition assessment efforts of
the American Water Works Association (AWWA) and American Society of Civil Engineers
(ASCE).

UConOnline.com | APRIL 2018

33



http://www.wyoben.com http://www.UConOnline.com

Underground Construction - April 2018

Table of Contents for the Digital Edition of Underground Construction - April 2018

Underground Construction - April 2018
Contents
Editor’s Log
Newsline
Washington Watch
Pipeline Projects
Utility & Communications Construction Outlook
CGA Issues Report Examining Advancements, Gaps in Underground Safety Tech
Modern Utility Investigations to Eliminate Some Project Risk
Digging Safely Starts With a Call or Click
Last-Minute Design Change Benefi ts Akron Project
DCA Convention Breaks Attendance, Auction Records
Study Warns Pipe Failures are Cause for Concern
First Look: Elgin Introduces Vertical Cuttings Dryer For HDD fluid Management System
Industry Honors Vic Weston with 2018 MVP Award
UCT Emerging Technology: Next-generation Technology Achieves Firsts for SIPP, Rehab Industries
Product Focus: CIPP Liners
Rehab News
Business
New Products
Equipment Spotlight
Business Cards
Sales Reps
Events
Ad Index
Underground Construction - April 2018 - Underground Construction - April 2018
Underground Construction - April 2018 - IFC
Underground Construction - April 2018 - Contents
Underground Construction - April 2018 - Editor’s Log
Underground Construction - April 2018 - 3
Underground Construction - April 2018 - Newsline
Underground Construction - April 2018 - 5
Underground Construction - April 2018 - 6
Underground Construction - April 2018 - 7
Underground Construction - April 2018 - Washington Watch
Underground Construction - April 2018 - 9
Underground Construction - April 2018 - Pipeline Projects
Underground Construction - April 2018 - 11
Underground Construction - April 2018 - Utility & Communications Construction Outlook
Underground Construction - April 2018 - 13
Underground Construction - April 2018 - 14
Underground Construction - April 2018 - 15
Underground Construction - April 2018 - CGA Issues Report Examining Advancements, Gaps in Underground Safety Tech
Underground Construction - April 2018 - 17
Underground Construction - April 2018 - 18
Underground Construction - April 2018 - 19
Underground Construction - April 2018 - Modern Utility Investigations to Eliminate Some Project Risk
Underground Construction - April 2018 - 21
Underground Construction - April 2018 - 22
Underground Construction - April 2018 - 23
Underground Construction - April 2018 - Digging Safely Starts With a Call or Click
Underground Construction - April 2018 - 25
Underground Construction - April 2018 - 26
Underground Construction - April 2018 - 27
Underground Construction - April 2018 - Last-Minute Design Change Benefi ts Akron Project
Underground Construction - April 2018 - DCA Convention Breaks Attendance, Auction Records
Underground Construction - April 2018 - 30
Underground Construction - April 2018 - 31
Underground Construction - April 2018 - Study Warns Pipe Failures are Cause for Concern
Underground Construction - April 2018 - 33
Underground Construction - April 2018 - First Look: Elgin Introduces Vertical Cuttings Dryer For HDD fluid Management System
Underground Construction - April 2018 - Industry Honors Vic Weston with 2018 MVP Award
Underground Construction - April 2018 - 36
Underground Construction - April 2018 - UCT Emerging Technology: Next-generation Technology Achieves Firsts for SIPP, Rehab Industries
Underground Construction - April 2018 - 38
Underground Construction - April 2018 - 39
Underground Construction - April 2018 - Product Focus: CIPP Liners
Underground Construction - April 2018 - Rehab News
Underground Construction - April 2018 - Business
Underground Construction - April 2018 - 43
Underground Construction - April 2018 - 44
Underground Construction - April 2018 - 45
Underground Construction - April 2018 - New Products
Underground Construction - April 2018 - 47
Underground Construction - April 2018 - 48
Underground Construction - April 2018 - 49
Underground Construction - April 2018 - Equipment Spotlight
Underground Construction - April 2018 - 51
Underground Construction - April 2018 - 52
Underground Construction - April 2018 - Business Cards
Underground Construction - April 2018 - 54
Underground Construction - April 2018 - 55
Underground Construction - April 2018 - Ad Index
Underground Construction - April 2018 - IBC
Underground Construction - April 2018 - BC
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