ImOn Ice Arena Dehumidification System Upgrade Project - Public HearingCity of Dubuque
City Council
PUBLIC HEARINGS # 1.
Copyrighted
February 3, 2025
ITEM TITLE: ImOn Ice Arena Dehumidification System Upgrade Project -
Public Hearing - Project No. 2849900004
SUMMARY: Proof of publication on notice of public hearing to consider
City Council approve the plans, specifications, form of
contract and estimated cost of $1,265,800.00 for the ImOn
Ice Arena Dehumidification System Upgrade Project through
adoption of the attached resolution, and City Manager
recommending approval.
RESOLUTION Approval Of Plans, Specifications, Form Of
Contract, And Estimated Cost For The ImOn Ice Arena
Dehumidification System Upgrade Project
SUGGUESTED Receive and File; Adopt Resolution(s)
DISPOSITION:
ATTACHMENTS:
1. MVM Memo
2. ImOn Ice Arena Dehumidification Project - Council Staff Public Hearing MEMO
3. ImOn Ice Arena Dehumidification Project - Council Staff Public Hearing
RESOLUTION
Page 356 of 721
THE CITY OF
DUBE
Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: ImOn Ice Arena Dehumidification System Upgrade Project
Public Hearing
Project No. 2849900004
DATE: January 28, 2025
Dubuque
AI WIN av
2007-2012.2013
2017*2019
Assistant City Engineer Robert Schiesl is recommending City Council approve the
plans, specifications, form of contract and estimated cost of $1,265,800.00 for the ImOn
Ice Arena Dehumidification System Upgrade Project through adoption of the attached
resolution.
The ImOn Ice Arena Dehumidification System Upgrade Project will include the
installation of a new, secondary dehumidification unit on the lower roof of the southeast
side of the facility. The new dehumidification system will require structural support
modifications to the roof trusses; will include installation of circular fabric air dispersion
ductwork routed the length of the arena; new gas piping, new electrical pulls; and a new
automated control system that will control both the existing and the new
dehumidification systems. The new dehumidification equipment will be installed in a
location that would not be impacted by the installation of a potential future 2nd ice
sheet.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
v
Mic ael C. Van Milligen
MCVM:sv
Attachment
cc: Crenna Brumwell, City Attorney
Cori Burbach, Assistant City Manager
Gus Psihoyos, City Engineer
Robert Schiesl, Assistant City Engineer
Jenny Larson, Chief Financial Officer
Marie Ware, Leisure Services Director
Jared Charland, Project & Facilities Manager Leisure Services
Page 357 of 721
THE COF
DtUB E
Masterpiece on the Mississippi
TO: Michael C. Van Milligen, City Manager
FROM: Robert Schiesl, Assistant City Engineer
SUBJECT: ImOn Ice Arena Dehumidification System Upgrade Project
Public Hearing Project
Project No. 2849900004
DATE: January 27, 2025
INTRODUCTION
Dubuque
AII•Amanu Clq
nniaMw.wx: uxzr
2007-2012.2013
2017*2019
This memorandum requests the City Council conduct a public hearing for the ImOn Ice
Arena Dehumidification System Upgrade Project.
BACKGROUND
The Imon Ice Arena is owned by the City of Dubuque and managed by the Schmitt
Island Development Corporation.
The existing air conditioning HVAC for the arena consists of six individual rooftop unit
air handling systems which provide air conditioning to various parts of the offices and
front entry areas of the facility. The most critical climate control ventilation equipment
within the Ice Arena is the centralized Munters BRR dehumidification system located in
the refrigeration plant mechanical room that services the entire facility. The current
16,000 CFM Munters BRR dehumidification system is undersized and does not provide
the dehumidification that is needed for the facility during the summer months.
DISCUSSION
The City has retained Nelson-Rudie & Associates, Inc., to complete a feasibility study
and provide design services for the development of an originally contemplated project
for the installation of a new dehumidification system, a new arena HVAC and
emergency generator system at the Imon Ice Arena. As part of the initial feasibility
study, Nelson-Rudie evaluated the existing dehumidification system, ventilation
systems, and ice plant system of the arena.
As part of the mechanical systems assessment, in collaboration with Nelson-Rudie, the
City retained an independent 3rd party mechanical system Commissioning Agent to test
and recalibrate the existing dehumidification and ventilation systems to ensure the
systems are operating at optimal performance and efficiency.
Following the mechanical systems assessment, Nelson-Rudie observed that the
existing dehumidification system is operating as designed and has an estimated 10-15
years of service life remaining.
Page 1 of 4
Page 358 of 721
Based on historical seasonal operational performance data, Nelson-Rudie concluded
that the existing dehumidification system performs well during the winter months when
outside humidity and dew points are low. However, the unit is undersized and does not
have the capacity for proper ventilation of the arena space during warmer times of the
year when outdoor humidity and dew points are much higher.
Nelson-Rudie is recommending adding a new, secondary dehumidification system that
will provide 7,500 CFM of supplemental dehumidification and ventilation to the arena
space.
The ImOn Ice Arena Dehumidification System Upgrade Project will include the
installation of a new, secondary dehumidification unit on the lower roof of the southeast
side of the facility. The new dehumidification system will require structural support
modifications to the roof trusses; will include installation of circular fabric air dispersion
ductwork routed the length of the arena; new gas piping, new electrical pulls; and a new
automated control system that will control both the existing and the new
dehumidification systems. The new dehumidification equipment will be installed in a
location that would not be impacted by the installation of a potential future 2nd ice
sheet.
IMPROVEMENTS NOT RECOMMEND - AT THIS TIME
The City was initially planning to include and develop a larger scale project for the
design and installation of a new dehumidification system, a new air conditioning HVAC
and emergency generator system at the Imon Ice Arena. However, due to higher cost
projections that exceeded available budgeted funding, the scope of improvements had
to be reduced.
As part of the initial feasibility study, Nelson-Rudie evaluated the addition of new air
conditioning equipment to provide conditioned air for the arena to support dry floor
events during summer months. To support the dehumidification system, Nelson-Rudie
recommended adding four (4) 50-ton air conditioning roof top units.
Not Recommended Improvement
Cost
Estimate
Full Arena Air Conditioning Units (HVAC)
$ 3,900,000
As part of the feasibility study, Nelson-Rudie also evaluated the energy loads of the ice
arena facility to determine capacity requirements for an emergency generator system.
Based on the operations of the ice arena, Nelson-Rudie recommended the following two
(2) generator system options for consideration.
Not Recommended Improvement
Cost
Estimate
Full Building Generator (1 Mega Watt)
$ 760,000
Critical Systems ONLY Generator (500 KW)
$ 549,000
Based on updated cost estimates and current available funding for the Ice Arena
improvements, there is insufficient funding available at this time to add the air
Page 2 of 4
Page 359 of 721
conditioning HVAC improvements or the emergency generator system as part of the
original contemplated project.
Staff are recommending that the prioritization of improvements to the arena include only
the dehumidification system as a Phase 1 project. The air conditioning HVAC and
emergency generator system could be budgeted in a future fiscal year or include with a
future potential 2nd ice sheet. The generator system could also then be sized to serve
both arena spaces.
PROJECT SCHEDULE
The project development schedule for the project will be as follows:
Initiate Public Bidding Process
January 21, 2025
Publish Notice to Bidders, Advertise for Bids
January 24, 2025
Notice of Public Hearing on Plans and Specs
January 24, 2025
Public Hearing on Plans and Specs
February 3, 2025
Receipt of Bid Proposals
February 20, 2025
Award Construction Contract
March 3, 2025
Completion Date
August 29, 2025
RECOMMENDATION
I recommend the City Council conduct a public hearing and approve the plans,
specifications, form of contract and construction estimate for the ImOn Ice Arena
Dehumidification System Upgrade Project.
BUDGETIMPACT
The estimate of probable cost for the ImOn Ice Arena Dehumidification System Upgrade
Project is summarized in the following table:
PROJECT COSTS
ESTIMATE
Construction Contract - Dehumidification Upgrade
$ 1,053,000
Contingency
47,000
Consultant Services Design - Nelson Rudie
112,640
Consultant Services Construction - Nelson Rudie
28,160
City Staff Services
25,000
Total Project Cost
$ 1,265,800
The proposed funding for the project is summarized in the following table:
Project No.
Fund Description
Fund
Amount
2849900004
Ice Center Dehumidification
$ 1,265,800
Total Project Funding
$ 1,265,800
Page 3 of 4
Page 360 of 721
ACTION TO BE TAKEN
I respectfully request the City Council conduct a public hearing and approve the plans,
specifications, form of contract and estimated cost for the ImOn Ice Arena
Dehumidification System Upgrade Project through adoption of the attached resolution.
Prepared by Robert Schiesl, Assistant City Engineer
cc: Jenny Larson, Chief Financial Officer
Marie Ware, Leisure Services Director
Jared Charland, PM Leisure Services
Mark Plantery, ImOn Ice Arena Manager
Rob Korman, Q Director of Facilities
FAPROJECTS\ImOn (Mystique) Ice Arena\Dehumidification HVAC System\Council & Staff Documents\Public
Hearing
Page 4 of 4
Page 361 of 721
Prepared by Kerry Bradley. City of Dubuque Engineering, 50 W. 13th St. Dubuque, IA 52001 (563)589-4270
Return to Adrienne N. Breitfelder City Clerk City of Dubuque, 50 W. 13th St. Dubuque, IA 52001 (563)589-4100
RESOLUTION NO. 40-25
APPROVAL OF PLANS, SPECIFICATIONS, FORM OF CONTRACT, AND
ESTIMATED COST FOR THE IMON ICE ARENA DEHUMIDIFICATION SYSTEM
UPGRADE PROJECT
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF
DUBUQUE, IOWA:
That the attached plans, specifications, form of contract and estimate of total cost
for the ImOn Ice Arena Dehumidification System Upgrade Project in the estimated
amount $1,265,800.00, are hereby approved.
Passed, approved, and adopted this V day of February 2025.
Attest:
Adrienne Breitfelder, CMC City Clerk
i
Br M. C an h, Mayor
STATE OF IOWA SS:
DUBUQUE COUNTY
CERTIFICATE OF PUBLICATION
I, Kathy Goetzinger, a Billing Clerk for Woodward
Communications, Inc., an Iowa corporation, publisher
of the Telegraph Herald, a newspaper of general
circulation published in the City of Dubuque, County
of Dubuque and State of Iowa; hereby certify that the
attached notice was published in said newspaper on the
following dates:
01/24/2025
and for which the charge is 44.46
64E cam' C
Subscribed to before me, a Notary lic in and for
Dubuque County, Iowa,
this 24th day of January, 2025
Notaryic in and for Dubuque County, Iowa.
JANET K. PAPE
Commission Number 199659
My Commission Expires
12/11 /2025
Ad text :
CITY OF DUBUQUE, IOWA
OFFICIAL NOTICE
NOTICE OF PUBLIC HEARING ON PLANS, SPECIFICATIONS, FORM OF
CONTRACT, AND ESTIMATED COST FOR THE IMON ICE ARENA
DEHUMIDIFICATION SYSTEM UPGRADE PROJECT
PUBLIC NOTICE is hereby given that the Dubuque City Council
will conduct a public hearing on the 3rd day of February 2025
at 6:30 p.m., in the Historic Federal Building 350 West 6th
Street, 2nd floor, Dubuque, Iowa at which meeting the City
Council proposes to hear the plans, specifications, form of
contract and estimated cost for ImOn Ice Arena
Dehumidification System Upgrade Project. Said proposed plans,
specifications, form of contract and estimated cost are now on
file in the office of the City Clerk. At said hearing any
interested person may appear and file objections thereto.
The scope of the Project is as follows: Install a new,
secondary dehumidification unit on the lower roof of the
southeast side of the facility. The new dehumidification
system will require structural support modifications to the
roof trusses; will include installation of circular fabric air
dispersion ductwork routed the length of the arena; new gas
piping, new electrical pulls; and a new automated control
system that will control both the existing and the new
dehumidification systems.
At the meeting, the City Council will receive oral and
written comments from any resident or property owner of said
City to the above action. The official City Council agenda
will be posted the Friday before the meeting and will contain
public input options. The agenda can be accessed at
https://dubuqueia.portal.civicclerk.com/ or by contacting the
City Clerk's Office at 563-589-4100,
ctyclerk@cityofdubuque.org.
Written comments on the public hearing may be submitted to
the City Clerk's Office by email at ctyclerk@cityofdubuque.org
or by mail to City Hall, 50 W. 13th St., Dubuque, IA 52001,
before the scheduled hearing. The City Council will review all
written comments at the time of the hearing.
Documents related to the public hearing are on file in the
City Clerk's Office and may be viewed Monday through Friday
between 8:00 a.m. and 5:00 p.m.
Individuals requiring special assistance should contact the
City Clerk's Office as soon as feasible. Deaf or
hard -of -hearing individuals can use Relay Iowa by dialing 711
or (800) 735-2942.
Published by order of the City Council given on the 21st day
of January, 2025.
Adrienne N. Breitfelder, City Clerk
It 1/24