HomeMy WebLinkAboutItem 05.b❖ Water Main Installation
LAKEVILLE PUBLIC WORKS
Christopher Petree, Director
May2012
The Engineering Division, working with a
developer, recently completed the
installation of a new high pressure water
main extension to expand residential
development east of the downtown area.
The unique thing about the water main was
that a portion of it was installed from CSAH
50 to Hartford Way and didn't involve
cutting a trench across sensitive landscape
areas. The 2000 feet of pipe was pulled
underground using directional boring or
horizontal directional drilling. This is a
steerable, trenchless method of installing
underground pipes, conduits, and cables in
a shallow arc along a prescribed bore path
by using a surface launched
drilling rig, with minimal impact
on the surrounding area. The
pipe was pulled in two segments
and joined in the middle. Holes at
either end of the process were
used to feed and pull the pipe
through. The process will work
with just about any pipe; this
installation used a flexible 8 -inch
high density polyethylene pipe
with each of the pieces joined by
heat fusion. This type of joint is
proof. The major segments of the pipe were connected with metal
flanged connectors. The installation of this water main provides two irrigation
services in Aronson Park and domestic water service to a park building.
leak
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❖ Storm Sewer Cleaning
The Utilities and Streets
Divisions teamed up to clear
a plugged storm sewer on
Jackpine Trail. The plug was
such that some storm water
was able to get through, but
it was enough to slow the
drainage of collection ponds
upstream. Using the jetter
on the Vactor, Utilities staff
entered the system at the
first manhole downstream
from the plug. The jetter,
with a special nozzle,
pushed up the pipe by
2000 psi water pressure
pushed at the plug in an
attempt to penetrate or
dislodge whatever was
restricting the water flow.
After much work, the
flow was improved
sufficiently to discern that
the problem was a small
log jammed into the pipe
which created sediment
build up behind it. When
that log was removed, a
second log was found under some of the sediment. Using the crane from the
catch basin repair trailer, Streets staff looped the cable around the second log
and pulled it out of the manhole. With the removal of the second log and the
remaining sediment, the storm sewer was restored to normal flow and the
upstream ponds were able to release some of the water from recent rains.
❖ Boulevard Mowing
The City has approximately 85
miles of City owned boulevards
and rural roadway ditches that it
mows every year. The primary
purpose is to maintain a clear
space along the edge of the
roadway for the safety of
motorists and pedestrians.
Keeping the grass and weeds
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cut down along the side of the road improves sight lines for motorists around
corners and at intersections. It also contributes to the aesthetics of the City
and presents a groomed look to the rural road segments. Mowing is
completed twice per year during the summer using a tractor with a side and
rear flail mower attachment.
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