US 52 North Sewer ImprovementTHE CITY OF
DUB E
Masterpiece vn the Mississippi
MEMORANDUM
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May 15, 2007 ~ C~`-. ~"
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TO: The Honorable Mayor and City Council Members y ~' cp
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FROM: Michael C. Van Milligen, City Manager o
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SUBJECT: US 52 North Storm Sewer Improvement Project
(CIP#7201810 &CIP#1001122)
The City is involved in a multi-phase project to improve the storm water drainage on US
52 North. This phase of the US 52 North Storm Sewer Improvement Project consists of
replacing a 24-inch diameter storm sewer with a 48-inch diameter storm sewer from the
Flexsteel Pumping Station across US 52 that will help to alleviate street flooding.
City Engineer Gus Psihoyos recommends the City Council approve the plans,
specifications, form of contract and the estimated cost of $310,649 for the US 52 North
Storm Sewer Improvement Project.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
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Mic ael C. Van Milligen
MCVM/jh
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Gus Psihoyos, City Engineer
Pat Crahan, Senior VP of Commercial Seating, Flexsteel Industries
THE CITY OF
DUB E
MASte~piece on the Mississi~~pi
MEMORANDUM
May 11, 2007
TO: Michael C. Van Milligen, City Manager
FROM: Gus Psihoyos, City Engineer ~/
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SUBJECT: US 52 North Storm Sewer Improvement Project
(CIP#7201810 &CIP#1001122)
INTRODUCTION
The enclosed resolution is in reference to the public hearing on the US 52 North Storm
Sewer Improvement Project.
BACKGROUND
In the fall of 1993, Flexsteel Industries, Dubuque County, and the City of Dubuque
officially formed a partnership to address the inadequate drainage in the vicinity of
Flexsteel. The City and County each committed to funding an equal third, up to
$100,000, for the improvement project that was recommended by IIW Engineers. The
project was completed in the winter of 1995 for $301,672.99. The project consisted of
the construction of a levee, detention area, and pump station to handle stormwater from
Olympic Heights, Highway US 52, and Jackson Street.
In 1998, the City discovered that debris had filled the storm sewers that convey
stormwater from Olympic Heights and US 52 to the pump station. While storm sewers
are typically designed to pass sediment that naturally passes through a watershed, the
gradient, or slope, of the existing storm sewers and the high water table makes them
susceptible to debris buildup. A Fiscal Year 1999 appropriation of $338,000 was
established for drainage improvements.
It was important to design a system not susceptible to the buildup of debris. The levee
constructed in 1995 proved effective at preventing the flow of groundwater from north to
south of the levee. As a result, it was possible to lower the water surface elevation south
of the levee by reconfiguring the pump station. A lower water surface elevation would
allow two things: storm sewers less susceptible to debris buildup and a detention basin
with increased storage volume.
The drainage improvements in the vicinity of Flexsteel were split into three projects. The
first project involved the excavation of the existing Flexsteel detention basin to increase
the available storage volume. It was completed in the fall of 1999 for $32,760.26. The
second project, completed in the spring of 2001 for $70,205.91, involved adding a
second pump to the pump station with the capability of lowering the water surface
elevation two feet below the level previously achieved level established in 1995. The
last phase involves storm sewer reconstruction.
In addition to the storm sewer improvements associated with the US 52 North Storm
Sewer Improvement Project, planned additional improvements involve adding ten
additional catch basins to better drain US 52. When complete, the current number of
catch basins on US 52 will be doubled.
The Iowa DOT has indicated that the second project could include substantial Iowa
DOT funding support. In addition, it can be done in conjunction with Iowa DOT's
resurfacing of US 52 from W. 32"d Street to the Northwest Arterial.
DISCUSSION
The US 52 North Storm Sewer Improvement Project consists of replacing a 24-inch
diameter storm sewer with a 48-inch diameter storm sewer from the Flexsteel Pumping
Station across US 52 that will alleviate street flooding.
BUDGET IMPACT
The total estimated project cost is as follows:
Construction
Contingency
Engineering
ROW/Easement
Total Project Estimate
The project will be funded by the following:
Balance of CIP#1001122, Jackson & Aquin Drainage
Portion of CIP#7201810, US 52 Storm Sewer
$ 243,144
24,314
40,119
3,072
$ 310,649
$ 165,560
$ 228,000
According to the guidelines provided by Iowa DOT District Engineer Jim Schoebelen in
January, 2006, up to $50,000 in project costs are eligible for Iowa DOT funding. The
actual amount will depend on a negotiated agreement with Iowa DOT.
The remaining balance of US 52 Storm Sewer will be reserved for addition storm sewer
improvements to be done in conjunction with the Iowa DOT resurfacing of US 52 North.
RECOMMENDATION
I recommend that the City Council approve the plans, specifications, form of contract
and the estimated cost for the US 52 North Storm Sewer Improvement Project.
ACTION TO BE TAKEN
The City Council is requested to approve the plans, specifications, form of contract and
the estimated cost for the US 52 North Storm Sewer Improvement Project.
Prepared by Deron Muehring, Civil Engineer II
cc: Barry Lindahl, City Attorney
Jenny Larson, Budget Director
Deron Muehring, Civil Engineer II
RESOLUTION NO. 296-07
APPROVAL OF PLANS, SPECIFICATIONS, FORM OF CONTRACT,
AND ESTIMATED COST FOR THE US 52 NORTH STORM SEWER
IMPROVEMENT PROJECT
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE
CITY OF DUBUQUE, IOWA:
That the proposed plans, specifications, form of contract and estimated
cost for the US 52 North Storm Sewer Improvement Project, in the estimated
amount $310,649.00, are hereby approved.
Passed, adopted and approved this 21st day of May, 2007.
Roy D. Buol, Mayor
Attest:
Kevin S. Firnstahl, Assisant City Clerk