Mystique Community Ice Center Ice Rink Concrete Subfloor Project -City of Dubuque
City Council Meeting
Action Items # 04.
Copyrighted
May 16, 2022
ITEM TITLE: Mystique Community Ice Center Ice Rink Concrete Subfloor Project -
Award Public Improvement Construction Contract
SUMMARY: City Manager recommending contract for the Mystique Ice Center Rink
Concrete Subfloor Project be awarded to Portzen Construction in the
amount of $379,000.00.
RESOLUTION Awarding Public Improvement Construction Contract for
the Mystique Ice Center Ice Rink Concrete Subfloor Project
SUGGESTED Suggested Disposition: Receive and File; Adopt Resolution(s)
DISPOSITION:
ATTACHMENTS:
Description Type
Award Mystique Ice Rink Concrete Subfloor Project- City Manager Memo
MVM Memo
Staff Memo
Resolution
Exhibit
Staff Memo
Resolutions
Supporting Documentation
THE CITY
DUOF
B TEE
Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Mystique Community Ice Center
Ice Rink Concrete Subfloor Project
Award Public Improvement Construction Contract
DATE: May 12, 2022
Dubuque
All -America City
IN
2007.2012.2013
2017*2019
The City received sealed bids on May 10, 2022, for the Mystique Ice Center Rink Concrete
Subfloor Project. Portzen Construction submitted the low bid in the amount of
$379,000.00. This bid amount is 8.3% above the revised estimate of probable cost.
The increase costs correlate with the overall price increases nation-wide for materials,
labor and equipment with the most significant increases being related to items impacted
by high steel prices. The Iowa DOT Price Trend Index for Iowa Highway Construction
documents an overall 31.8% increase in bid prices received in the 1st quarter of 2022
when compared to the average prices seen throughout 2021.
Assistant City Engineer Bob Schiesl recommends contract for the Mystique Ice Center
Rink Concrete Subfloor Project be awarded to Portzen Construction in the amount of
$379,000.00. Sufficient funds are available in the budget for this project.
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
Marie Ware, Leisure Services Manager
Robert Schiesl, Assistant City Engineer
THE CITF
DUjB_ E
Masterpiece on the Mississippi
TO: Michael C. Van Milligen, City Manager
Gus Psihoyos, City Engineer
FROM: Robert Schiesl, Assistant City Engineer
DATE: May 10, 2022
SUBJECT: Mystique Community Ice Center
Ice Rink Concrete Subfloor Project
Award Public Improvement Construction Contract
INTRODUCTION
Dubuque
III -America M4
2007,2012.2013
2017*2019
The purpose of this memorandum is to provide the City Council with information related
to the recommendation for awarding the Public Improvement Construction Contract for
the Mystique Ice Center Rink Concrete Subfloor Project.
BACKGROUND
The Mystique Community Ice Center was designed, developed, and built under a
Development Agreement between and among DICE, the City, the Dubuque Racing
Association (DRA), and Battlefield Dubuque, LLC which later transferred and assigned
its interest to Northern Lights Hockey, LLC. The Agreement commenced October 30,
2009. The Center opened September 18, 2010.
The building is owned by the City.
The Ice Arena was constructed on property in close proximity to the Mississippi River, on
less than favorable subsurface soil conditions. During the original design development for
the Ice Center, the geotechnical soils report indicated substantial depths of loose fill sand
and miscellaneous landfill materials discovered by the subsurface borings.
The Ice Arena building structure was constructed on a deep foundation system, however
the lower -level main floor was constructed as an unsupported slab -on -grade. Since initial
construction, the foundation supported structure has displayed no signs of settlement or
movement. However, the unsupported slab -on -grade lower level has developed
significant differential settlement throughout the main floor.
In November 2020, the City completed a full interior building scan of the Mystique Ice
Center which indicated settlement in the range of zero to 4 plus inches throughout the
main floor concrete slab. The differential settlement has caused operational issues with
the ice rink, rotational movement of the stadium bleachers, movement in the unsupported
interior CMU walls, and settlement of ice system mechanical equipment.
In the spring and summer of 2021, additional ongoing settlement was observed. As a
result, staff felt that it was important to limit and restrict occupancy the northeast portion
of the facility while a ground penetrating radar (GPR) scan assessment of the lower -level
main floor. The GPR scan results indicated that there were no major voids (greater the 1-
foot or more) under the concrete floor slab. The GPR scan indicated possible voids up to
4" in various locations.
Based on the increased frequency of additional observed settlement and the presence of
minor voids under the main floor concrete slab, the City completed a Floor Slab Void
Filling, Lifting and Leveling Project as an interim remediation options to slow down the
floor slab settlement and allow for occupancy use until full remediation work can be
performed.
DISCUSSION
Over the past 12 months, City staff has been evaluating foundation soil remediation
alternatives and consulting with several design -build geotechnical contractors that
specialize in low mobility, low head room clearance, interior finished building, non-
destructive deep foundation stabilization applications.
Many of the specialty contractors are proposing a combination of solutions to provide both
long-term settlement control and improve support to the ice rink sheet and floor system.
Remediation solutions included the installation of geopiers, micropiles, helical piles, deep
compaction grout applications, deep injection polymers, polyurethane foam grouting and
slab -jacking.
The first phase of work will be the removal of the existing rink and ice system to allow for
the installation of a deep foundation system under the rink area. Once the settlement and
foundation system are completed, a concrete subfloor will be installed and supported on
the deep foundation system. Once the concrete subfloor is in -place, a new refrigerated
ice rink concrete floor will then be reinstalled which will be supported by the subfloor slab.
The attached exhibit shows the how the deep foundation system, the concrete subfloor,
and the refrigerated concrete floor will function as a supported system under the ice rink.
BID RESULTS
The City received sealed bids on May 10, 2022, for the Mystique Ice Center Rink Concrete
Subfloor Project. Portzen Construction, Inc., of Dubuque, IA submitted the low bid in the
amount of $379,000.00. This bid amount is 8.3% above the revised estimate of probable
cost. A summary of the bid proposals received is as follows:
Contractor Name Total Bid
Portzen Construction, Inc. $ 379,000.00
Tricon General Construction, Inc. $ 426,000.00
RECOMMENDATION
The two (2) bids received were 8.3% and 21.7% respectively above the revised estimate
of probable cost. The estimate of probable cost was revised during the bidding phase
based upon feedback from contractors and material suppliers related to anticipated
construction market cost increases.
The increase costs correlate with the overall price increases nation-wide for materials,
labor and equipment with the most significant increases being related to items impacted
by high steel prices. The Iowa DOT Price Trend Index for Iowa Highway Construction
documents an overall 31.8% increase in bid prices received in the 1st quarter of 2022
when compared to the average prices seen throughout 2021.
I recommend the public improvement contract for the Mystique Ice Center Rink Concrete
Subfloor Project be awarded to Portzen Construction, Inc., of Dubuque, IA, in the amount
of $379,000.00.
BUDGETIMPACT
The estimate of probable cost for the Mystique Ice Center Rink Concrete Subfloor Project
is summarized in the following table:
Description
Original
Cost Estimate
REVISED
Cost Estimate
Award
Construction - Ice Rink Concrete Subfloor
$ 225,000.00
$ 350,000.00
$ 379,000.00
Consultant Services
51,510.00
51,510.00
51,510.00
Engineering Dept. Services and Administration
20,000.00
20,000.00
20,000.00
Total Construction Cost Estimate
$ 296,510.00
$ 421,510.00
$ 450,510.00
The original estimate of probable cost was revised during the bidding phase based upon
feedback from contractors and material suppliers due to anticipated construction market
cost increases.
The proposed project funding is summarized as follows:
CIP No.
Fund Description
Fund Amount
3502890
Ice Center Settling Remediation (FY23)
$ 4,600,000
Total Project Funding
1 $ 4,600,000
REQUESTED ACTION
I respectfully request that the City Council award the Public Improvement Construction
Contract for the Mystique Ice Center Rink Concrete Subfloor Project to Portzen
Construction, Inc., in the amount of $379,000.00, through adoption of the attached
resolution.
cc: Jenny Larson, Director of Finance and Budget
Marie Ware, Leisure Services Manager
Mike Shimkus, WHKS
FAPROJECTS\Mystique Community Ice Center\2022 Settlement Remediation Project\Ice Rink Concrete Subfloor
Project\Council & Staff Documents\Award
Prepared by Robert Schiesl City of Dubuque Engineering 50 W. 13" St Dubuque IA 52001 (563)589-4270
Return to Adrienne N. Breitfelder City Clerk City of Dubuque, 50 W. 131" St. Dubuque, IA 52001 (563)589-4100
RESOLUTION NO. 198-22
AWARDING PUBLIC IMPROVEMENT CONSTRUCTION CONTRACT FOR THE
MYSTIQUE ICE CENTER ICE RINK CONCRETE SUBFLOOR PROJECT
Whereas, sealed proposals have been submitted by contractors for the Mystique
Ice Center Rink Concrete Subfloor Project, (the Project) pursuant to Resolution No. 137-
22 and Notice to Bidders published on the City of Dubuque, Iowa website and plan room
service with statewide circulation on the 8th day of April 2022; and
Whereas, said sealed proposals were opened and read on the loth day of May
2022 and it has been determined that Portzen Construction, Inc., of Dubuque, Iowa
submitted low bid in the amount of $379,000.00, and is the lowest responsive, responsible
bidder for the Project.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY
OF DUBUQUE, IOWA:
That a Public Improvement Construction Contract for the Project is hereby
awarded to Portzen Construction, Inc. and the City Manager is hereby directed to execute
a Public Improvement Construction Contract on behalf of the City of Dubuque for the
Project.
Passed, adopted, and approved this 16th day of May 2022.
David . esnl1< ayor ro em
Attest:
�i �
Trish L. Gleason, Assistant City Clerk
EXISTING APRON SLAB
CUT AT CONTROL JOINT �\ j
EXCAVATION LINE —
J � I
1y" I
IV,
ICE
RINK
DASHERBOARD CONTRACTOR TO SPECIFY ANCHOR BOLT
DASHERBOARD SYSTEM,
SIZE/TYPE/LOCATION AND SUBMIT TO ENGINEER, TYP.
6" WIDE (TYP)
FEEDER
TRENCH
►{10"r
EXISTING 4" CONCRETE SLAB WITH WWF
ICE SURFACE
® APRON SLAB, APPROX. 6'X13'
(AP
RQX)
6x6 W2.9xW2.9 ON 6 MIL VAPOR BARRIER
O
5" COLD SLAB ON VAPOR BARRIER
`,
10' RINK SUBFLOOR SLAB (TYP.)
NEW ELEVATED SLAB UNDERNEATH PLAYER, PENALTY,
4" POLYSTYRENE INSULATION
AND TIMEKEEPER BOXES. COORDINATE LOCATION AND
4" GRANULAR FILL
V-6" 2'-11" MIN.
HEIGHT WITH DASHERBOARD CONTRACTOR
WITH HEATING TUBES
— — — — -J'. ■ 12" MIN.
K SLAB
THE CONTRACTOR SHOULD NOTE THAT A LINE OF DEEP FOUNDATION
ELEMENTS IS TO BE LOCATED APPROXIMATELY 6" FROM EACH EDGE OF
THE FEEDER TRENCH SLAB.
LOWER RINK SUBFLOOR SLAB =�
13.5"--
��c
8"X2'-4 REINFORCED CONCRETE
TIE BEAMS BETWEEN MAIN
8"X8" MIN. BEARING AREA BUILDING COLUMNS.
O SEE DETAIL ON SHEET G2
NEW DEEP FOUNDATION — 3
ELEMENTS TYP.)
PROPOSED RINK SECTION
TOP OF FLOOR SLAB ELEVATION 614.50
�ORIGINPL F usH.IL— oesem—V I
BOTTOM OF SUPPORT SLAB ELEVATION 612.58
TOP OF EXISTING TIE BEAMS ELEVATION 612.50
BOTTOM OF LOWER RINK SUBFLOOR
SLAB ELEVATION 611.46
KEY
DEEP FOUNDATION ELEMENTS - SETTLEMENT REMEDIATION
ICE RINK CONCRETE SUBFLOOR
ICE RINK REFRIGERATED FLOOR