Finance Committee - 3/6/2019 Page 6
From: Dan Kooken, Purchasing Manager
Re: 2019 CIPP Lining Project
MOTION BY ALDERWOMAN KELLY TO ACCEPT, PLACE ON FILE AND, CONTINGENT UPON BOARD
OF ALDERMEN APPROVAL, AWARD THE CONTRACT TO KENYON PIPELINE INSPECTION, LLC, IN
THE AMOUNT OF $2,825,135. SOURCE OF FUNDING IS DEPARTMENT 169, WASTEWATER; BOND
FUNDS
ON THE QUESTION
Mayor Donchess
And if you could briefly explain what the lining does and how it differs from replacement of a sewer line and the
difference in cost that would be, I’m sure, enlightening.
Amy Gill, Senior Staff Engineer
Thank you. Ms. Amy Gill from Engineering. This project is the annual lining project that the City puts out to
address aging and deteriorating sewers. What the City is trying to do in order to use the most cost effective
approach in taking care of our aging and deteriorating mains is to use trenchless technology to put in in fact the
liner that goes inside the existing sewer that is in the ground as opposed to digging up the pipe and replacing
it. The lining entails a fabric that is impregnated with an epoxy material that, it’s like an inside out sock, you
push the inside out sock through the existing sewer in the ground and then they heat up that pipe and it
becomes a hardened structure around the pipe that is in the ground. Essentially there is no digging up of the
roadway at all, so therefore you don’t have any street repair, but you do get a sewer that is structurally sound.
Mayor Donchess
And the cost of this is significantly less than replacement?
Amy Gill, Senior Staff Engineer
Correct. When you replace of course you have to dig a trench that is typically, depending on the size of the
pipe, 8 to 10 feet wide and then you have to excavate and replace the fill and the asphalt and sidewalks and
curbing and other things that may be in the way of the sewer when you excavate. When we do do the lining
project we also do address the manholes. If they are aging as well, we do a lining of those usually with either
epoxy material or cement lining in order to keep the integrity of that as well.
Alderwoman Kelly
Thank you. Does it extend the life of the sewer before replacement and how long?
Amy Gill, Senior Staff Engineer
Typically Trenchless Technology has been around for 50 years. They say, because people are using it more
and more, they say 50 to 60 years but it wouldn’t be unusual to get more than that. They haven’t been in the
ground long enough to know.
Alderman Klee
Thank you. | know that in the City as you said we have the aging sewage and | know we have done some work
on some of them. | apologize, | was trying to look for this earlier today, how many miles are we planning on
doing, like with the streets, how many miles are we planning on doing and how many years are we planning on
doing it over? | would assume that we’ve got a long time, just because with our streets we are doing 11 miles
or something.
