HomeMy WebLinkAbout2018.06.18 CC Minutes - Gravel Roads Workshop ra
CITY OF Minutes
HUGO CITY COUNCIL MEETING
GRAVEL ROADS WORKSHOP
EST.1906 HUGO CITY HALL
wwwdhugonn.us00
14669 Fitzgerald Avenue North•Hugo,MN 55038 MONDAY,JUNE 18, 2018 —6 P.M.
Call to Order
Acting Mayor Petryk called the meeting to order at 6:02 p.m.
PRESENT: Haas, Klein, Miron, Petryk, Weidt (arrived at 6:09)
ABSENT: None
ALSO PRESENT: City Administrator Bryan Bear, City Engineer Mark Erichson, Public Works
Director Scott Anderson, WSB Engineering Mike Rief, and City Clerk Michele Lindau
City Administrator Bryan Bear provided background reminding the Council about the discussion
last fall regarding the condition of the gravel roads. Staff had been directed to communicate with
residents on the roads that were not preforming up to standards and gather feedback. Staff had
been working on a solution, and he introduced WSB Engineer Construction Services Manager
Mike Rief.
Rief provided background on himself stating he had worked with pavement type issues, with
pavement design, and pavement and material forensics for over 20 years and has been with WSB
for the last 13 years. He worked closely with Public Works Director Scott Anderson on
identifying the roadways that were bad, and they reviewed the history and conditions present
when the issues were occurring.
Public Works Director explained that in 2007, all gravel roads went into the dust control program
using modified Class 5 gravel, and the portion of small particles of silt and clay (i.e."fines")
appeared to have increased. In 2010, it was observed that the roads became muddy, and in 2012,
they increased to a"pudding" substance. The City has since added rock and sand to provide a
temporary fix.
Rief added that the problems seemed to occur after a rain event that followed a blading event.
After blading, the roads become very permeable, and moisture remained on the road for an
extended time. He felt the City's maintenance practices had been the proper ones.
Test pits were dug in five different areas that showed the upper two layers had different
composition. Some showed limestone that was very dusty, some showed course rock, but of most
concern was three inches down where they found gravel that was stuck and bonded together. The
binding component is foreign to aggregate surface roads. Silty soils will attract water, and there
was also a high percentage of clay found that retains water. Layers with fines locked the water,
and clay prevented the water from going down. Mike concluded there was a need to clean up the
aggregate, modify the dust management, increase the slope where needed in a few places to
maintain 4-6%, and incorporate compaction into the blading process to tighten the surface.
Hugo City Council Meeting Minutes for June 18,2018—Gravel Roads Workshop
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Removing and replacing the poor material would cost $350,000 for the seven miles of gravel
roadways.
Another option was to reclaim the materials and blend in other product. He suggested reclaiming
the top 10" of aggregate materials and blend in materials to meet a class five aggregate.
Compaction and grading could be done by City staff. Rief recommended a test section of 1.67
mile that would cost $9,000 plus $3,000 to rent the equipment. If it worked, the remaining 5.5
miles could be done for $39,000 in 2019.
The Council had questions on why there were so many fines, what roads would be done first, how
to ensure it does not happen again, and why not do the entire project.
Public Works Director Scott Anderson replied that he was not positive why they ended up with so
many fines, but the thought was that the fines were compacted when gradation was performed,
but later broke down. Rief stated that he was confident the material beneath was good. They
would also be looking at reducing the dust control application rate to see how the roads perform,
and additional testing could be done to ensure the supplier was providing the City proper gravel.
Anderson responded to the question on completing the entire project. He stated that the roads that
turn to "pudding" are good most of the time when dry. He said he was hesitant to do the entire
project without testing it first, and would like to get through next spring before doing all the
roads. The City had been adding sand as a temporary fix, which has helped. Scott stated that the
roads have been performing fairly well with the last rains.
Weidt suggested a test road be done two ways to see which is better, and Rief suggested doing a
side by side analysis. The Council agreed they should do all they can.
City Administrator stated he would have a recommendation prepared for Council consideration at
their July 2, 2018, meeting.
Adiournment
Klein made motion, Haas seconded, to adjourn at 6:56 p.m.
All Ayes. Motion carried.
Respectfully Submitted,
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Michele Lindau
City Clerk