2025 Maintenance Dredging Project - Acceptance of Public Improvement Construction ContractCity of Dubuque
City Council
CONSENT ITEMS # 13.
Copyrighted
December 15, 2025
ITEM TITLE: 2025 Maintenance Dredging Project - Acceptance of Public
Improvement Construction Contract
SUMMARY: City Manager recommending City Council adopt the attached
resolution to accept the Public Improvement Construction
Contract and to authorize the payment of the contract amount
of $261,416.21 to Newt Marine Service for the 2025
Maintenance Dredging Project.
RESOLUTION Accepting The 2025 Maintenance Dredging
Project And Authorizing Final Payment To The Contractor
SUGGUESTED Receive and File; Adopt Resolution(s)
DISPOSITION:
ATTACHMENTS:
1. MVM Memo
2. 2025 Maintenance Dredging Project - Council Acceptance Staff MEMO
3. 2025 Maintenance Dredging Project - Council Accept Final Payment RESOLUTION
Page 314 of 1019
THE CITY OF
DUBE
Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: 2025 Maintenance Dredging Project
Acceptance of Public Improvement Construction Contract
Dubuque
AI WIN av
2007-2012.2013
2017*2019
Project Number: 5546000001-304-67990 - Harbor Area Dredging
DATE: December 10, 2025
Assistant City Engineer Robert Schiesl is recommending City Council adopt the
attached resolution to accept the Public Improvement Construction Contract and to
authorize the payment of the contract amount of $261,416.21 to Newt Marine Service
for the 2025 Maintenance Dredging Project.
The 2025 Maintenance Dredging Project was completed by Newt Marine Service of
Dubuque Iowa in the final contract amount of $261,416.21 which is a 9.7% increase
from the original contract amount of $238,385.50. The added costs incurred were a
result of payment for over depth dredging. In accordance with the contract documents to
cover inaccuracies of the dredging process, material removed below the design dredge
elevation to a depth of not more than 6 inches is measured and paid for at the contract
unit price.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Y
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
Laura Bendorf, Budget Manager
Nathan Steffen, Civil Engineer
Page 315 of 1019
THE CITY OF
DUB E
Masterpiece on the Mississippi
TO: Michael C. Van Milligen, City Manager
FROM: Robert Schiesl, Assistant City Engineer
DATE: December 10, 2025
RE: 2025 Maintenance Dredging Project
Acceptance of Public Improvement Construction Contract
Dubuque
All -America City
2007.2012.2013
2017*2019
Project Number: 5546000001-304-67990 - Harbor Area Dredging
INTRODUCTION
The enclosed resolution provides for the acceptance of the Public Improvement
Construction Contract for the 2025 Maintenance Dredging Project.
BACKGROUND
The Sportfishing and Boating Safety Act - BIG Tier 1 grant funding supports boating as a
popular recreational activity; there are approximately 11.8 million registered recreational
boats in the United States. Of this total, an estimated 584,000 are at least 26 feet long.
The Sportfishing and Boating Safety Act of 1998 (Public Law 105-178) established the
Boating Infrastructure Grants (BIG) Program (16 U.S.C. 777g-1) to provide funding to the
50 States, for the construction, renovation, and maintenance of boating infrastructure
facilities for transient recreational vessels at least 26 feet long that are operated, leased,
rented, or chartered primarily for pleasure.
On September 5th, 2023, the City Council authorized, and staff submitted a Boating
Infrastructure Grant (BIG Tier 1) application to the US Fish and Wildlife Service and Iowa
Department of Natural Resources for dredging the marina to provide transient boaters,
and boaters who operate vessels 26 feet or larger, access to docking and safe harbor
facilities, including fueling, pump -out, bathroom and shower facilities, access to clean
water, electricity, and other utilities.
In July 2024, the City received the Notice of Award from the Iowa DNR / USFWS for the
BIG Tier 1 Grant, and per Resolution 307-24, the City Council authorized the execution
of the BIG Tier 1 Subrecipient Grant Agreement.
DUBUQUE MARINA FUNDING AGREEMENT
On July 7t", 2025, per Resolution 242-25, the City Council authorized the execution of a
Funding Agreement between the City and Dubuque Marina, Inc. for the partnership
agreement to provide the required local match funding ($100,000) for the 2024 BIG Tier
1 Grant to perform maintenance dredging at Dubuque Marina
BIG TIER 1 GRANTS - DREDGING PLAN
Page 316 of 1019
The objective and scope of work for the 2025 Maintenance Dredging Project, utilizing the
2024 BIG TIER 1 Grant funding that was awarded is to perform maintenance dredging
within the approximate area shown in Figure 1, to an approximate river bottom elevation
of 586.5-Ft., which will provide adequate depth for transient boats 26 feet in length or
greater and will create a safe open water for navigating vessels from the Peosta Channel
to and from the existing transient dock for fuel, water, and holding tank pump -out.
0 Deep 4,
N Kip
< - 5 Deep � i q�_3IENT JOC
A��
--� ,
O 2022 BIG GRANT
DREDGE AREA
DREDGEARE, � � 1
Figure 1 - Dubuque Marina Area to be Dredged
2024 Maintenance Dredging
Project No. 1
2022 BIG Tier 1 Grant Funding
was used to perform dredging
within the area outlined in
RED, this project was
complete in 2024.
2025 Maintenance Dredging
Project
2024 BIG Tier 1 Grant Funding
to be used to perform dredging
within the area outlined in
GREEN.
The dredging project will provide adequate depth and an improved open waterway for
safely navigating transient vessels. By dredging and creating the open waterway from the
Peosta Channel to the marina transient docks, this will create improved water flow and
water circulation which will reduce the potential for future sediment siltation within the
proposed dredge location. The proposed dredged open waterway will be more
sustainable long-term and will maximize the return on the investment of federal BIG
funding with a long-term solution in providing safe harbor access for daily and overnight
transient boaters.
DISCUSSION
With the completion of the current 2025 Maintenance Dredging Project alongside
previous dredging efforts in 2023 and 2024, the Dubuque Marina now benefits from
adequate depth and enhanced open waterway access at its highest priority areas for
recreational and transient boating. By dredging additional zones beyond the City's
maintenance obligations and establishing open channels from the Peosta Channel has
created safe open water for navigating vessels to and from the existing transient dock for
fuel, water, and holding tank pump -out.
2
Page 317 of 1019
The 2025 Maintenance Dredging Project was completed by Newt Marine Service of
Dubuque Iowa in the final contract amount of $261,416.21 which is a 9.7% increase from
the original contract amount of $238,385.50. The added costs incurred were a result of
payment for over depth dredging. In accordance with the contract documents to cover
inaccuracies of the dredging process, material removed below the design dredge
elevation to a depth of not more than 6 inches is measured and paid for at the contract
unit price.
RECOMMENDATION
I recommend that the City Council accept the Public Improvements and authorize the
payment of $261,416.21 to Newt Marine Service for the 2025 Maintenance Dredging
Project.
BUDGETIMPACT
The project cost for the 2025 Maintenance Dredging Project is summarized in the
following table:
Description
Cost Estimate
Award
Final Cost
Dredge Construction - Dubuque Marina
$ 202,700.00
$ 211,455.50
$ 234,665.23
Alternate 1 - Remove and Replace Dock Spuds
18,000.00
20,000.00
20,000.00
Alternate 2 - Lift Well Dredging
14,400.00
6,930.00
6,750.98
Contingency
35,000.00
31,714.50
0.00
Total Construction Cost (Newt Marine)
$ 270,100.00
$ 270,100.00
$ 261,416.21
Bathometric Survey (Mohn Surveying, Inc.)
-
-
3,276.00
Total Construction Cost
$ 270,100.00
$ 270,100.00
$ 264,692.21
The proposed funding for this project is summarized as follows:
Project Number
Fund Description
Fund Amount
5546000001-304-67990
Harbor Area Dredging (BIG TIER 1 Grant)
$ 164,692.21
Private Participation - Dubuque Marina
100,000.00
Total Project Funding
$ 264,692.21
REQUESTED ACTION
The City Council is requested to adopt the attached resolution to accept the Public
Improvement Construction Contract and to authorize the payment of the contract amount
of $261,416.21 to Newt Marine Service for the 2025 Maintenance Dredging Project.
cc: Jenny Larson, Chief Financial Officer
Nathan Steffen, Civil Engineer
George Scholten, Iowa DNR
Dubuque Marina
FAPROJECTS\DREDGING PROJECTS\2025 Maintenance Dredge\Council & Staff Documents\Award
3
Page 318 of 1019
Prepared by Nathan Steffen, Civil Engineer, City Clerk, 50 W. 13th St., Dubuque IA 52001, (563) 589-4270
Return to Adrienne N. Breitfelder, City Clerk, 50 W. 13"' St., Dubuque, IA 52001, (563) 589-4100
RESOLUTION NO. 388-25
ACCEPTING THE 2025 MAINTENANCE DREDGING PROJECT AND AUTHORIZING
FINAL PAYMENT TO THE CONTRACTOR
WHEREAS, the 2025 Maintenance Dredging Project (the Project) to perform
maintenance dredging at Dubuque Marina; and
WHEREAS, the Public Improvement Contract for the Project has been completed
by the contractor, Newt Marine Service (Contractor), and the City Engineer has examined
the work and recommends that the Project be accepted; and
WHEREAS, the final contract amount for the Project is $261,416.21; and
WHEREAS, the Contractor has previously been paid $253,573.72, leaving a
balance of $7,842.49; and
WHEREAS, the City Council finds that the recommendation of the City Engineer
should be accepted.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY
OF DUBUQUE, IOWA:
SECTION 1. The recommendation of the City Engineer is approved and the
Project is hereby accepted.
SECTION 2. The Chief Financial Officer is hereby directed to pay the balance of
the retainage of $7,842.49 as provided in Iowa Code Chapter 573, and to pay such
retainage in accordance with the provisions of Iowa Code Chapter 573 or Iowa Chapter
26.13.
Passed, approved and adopted this 151h day of December , 2025.
Brad M. Cavanagh, Mayor
Attest: Rom,
Adrienne N. Breitfelder, City Clerk
CITY ENGINEER CERTIFICATE OF FINAL COMPLETION OF THE 2025
MAINTENANCE DREDGING PROJECT
The undersigned City Engineer of the City of Dubuque, Iowa, hereby certifies that
he has inspected the 2025 Maintenance Dredging Project and work has been
performed in compliance with the terms of the Public Improvement Contract, and that
the total cost of the completed work is $264,692.21.
Dated this the loth day of December , 2025.
Gus Psihoyos, City Engin er
Filed in the office of the City Clerk on the 10th day of December , 2025.
�� ""rt r A'v�"-"
Adrienne N. Breitfelder, City Clerk
Page 320 of 1019