The in basket: Charles Dick has a theory about why Bethel
Avenue, now undergoing a maintenance project by the city of Port
Orchard, is so terribly rough.
“Just after the county installed the new sewer line,” he said.
“There was an earthquake that caused a lot of the man holes to
sink. They have been a problem ever since, with many repairs,
but to no avail. The earthquake probably separated the pipe
joints, allowing soil to seep into the line, thus causing settling
around the manholes.
“The road is really bad throughout the whole of the northbound
lane,” he said. “It would seem that any repair will be major,
in order to fix those man holes and pipe joints before the road
base is repaired. Has anyone looked into that problem and do
you know of any plans to fix them?”
The out basket: The sewer lines and manholes are the property of
West Sound Utility District, which says the mains are fine, and
that the poor condition of the manholes has nothing to do with an
earthquake.
Brett Winters, operations manager for the district, says, “West
Sound Utility District installed the sewer main on Bethel Road in
1999. The sewer main and manhole locations are based on the
proposed road improvements by Kitsap County.”
Since then, Port Orchard has annexed the road and its
surroundings and that’s why it’s the one making pavement repairs on
a portion of it this summer
“The manholes are normally placed in the center of the road to
avoid traffic driving over them,” Brett continued. “The center of
the proposed road placed the manholes temporarily in the wheel path
of northbound vehicles on the existing road. The high volume of
traffic driving across the manhole covers has caused the adjustment
rings between the top of the concrete manhole structure and the
cover at the road surface to break down. The cover then sinks below
the surface of the asphalt as the adjustment rings degrade.
“The district has replaced the adjustment rings on the manholes
several times over the years but the long-term fix is to move the
manholes out of the wheel path of vehicles. We are working with the
city of Port Orchard during their planning process to improve the
Bethel Corridor. The alignment of the driving lane should move the
wheel path off the manholes providing a long-term fix for the
problem.
“The District has an aggressive sewer maintenance program that
provides for inspecting all manholes, televising, inspecting and
jet cleaning all sewer mains,” Brett said. “The pipe and manhole
structures are in excellent condition and we are confident that the
realignment of the driving lanes will stop the rapid deterioration
of the adjustment rings.”
Mark Dorsey, Port Orchard’s public works director, said the work
going on now is what he calls “mills and fills,” in which degrading
pavement and subgrade are ground out and replaced between Mitchell
Avenue and Vallaire Court on Bethel Avenue and between Cathie Lane
and Carl Pickel Drive on Lund Avenue, with a new overlay of the
Lund/Bethel intersection itself. The subgrade repairs can be more
extensive and include use of a geotextile fabric, he said.
More mills and fills along the rest of the Bethel corridor are
planned in 2016 and 2017.
The city must redesign the long-term improvement, which it will
begin doing in 2018. “The actual Bethel Corridor reconstruction
project is currently scheduled for 2025,” Mark said.