Item 4.1 Wellhouse 4 Drinking Water Improvements Project
Request for
City Council Action
DEPARTMENT INFORMATION
ORIGINATING DEPARTMENT REQUESTOR: MEETING DATE:
Utilities Utility Manager Neidermeier July 28, 2025
PRESENTER(s) REVIEWED BY: ITEM #:
AE2S
AE2S Engineer Hanson
Assistant City Administrator/Human Resources Hille
4.1 – Wellhouse No. 4 WTP
Change Orders
STRATEGIC VISION
MEETS: THE CITY OF OTSEGO:
Is a strong organization that is committed to leading the community through innovative communication.
X Has proactively expanded infrastructure to responsibly provide core services.
Is committed to delivery of quality emergency service responsive to community needs and expectations in a
cost-effective manner.
Is a social community with diverse housing, service options, and employment opportunities.
Is a distinctive, connected community known for its beauty and natural surroundings.
AGENDA ITEM DETAILS
RECOMMENDATION:
City Staff is recommending that the Council approve Change Order Proposals 005R1, 008, 009, and 012 from Market &
Johnson for the Wellhouse No. 4 Water Treatment Plant (WTP) project.
ARE YOU SEEKING APPROVAL OF A CONTRACT? IS A PUBLIC HEARING REQUIRED?
No No
BACKGROUND/JUSTIFICATION:
The following table summarizes the change orders being submitted for Council consideration related to the Wellhouse
No. 4 Water Treatment Plant (WTP). Due to the time-sensitive nature of COR 009, it is being forwarded for immediate
action by the full Council. Additional details on each change order are provided below.
COR # Description Amount
COR 005R1 Switching chemical feed pumps from peristaltic to diaphragm -$4,802.27
COR 008 Changing two valves from electric to manual operation -$5,086.14
COR 009 Constructability adjustment to top of backwash tank interior walls $41,262.85
COR 012 Add grout to slope backwash tank floor toward sump and waste pump -$917.68
COR 005R1
The City directed a change from peristaltic-style to diaphragm-style chemical feed pumps to maintain consistency across
other City facilities. This proposal reflects a deduction of $4,802.27 to the construction contract due to the lower cost of
the diaphragm pumps.
COR 008
Based on revised process piping recommendations from the filter manufacturer that was the winning equipment bidder,
the automated control of two valves is no longer necessary. As a result, these valves will be converted to manual
operation. This proposal reflects a deduction of $5,086.14 to the construction contract due to the lower cost of manual
valves.
COR 009
During construction, the Contractor and the Engineer’s RPR (Resident Project Representative) observed that the bottom
of the backwash tank had been constructed flat, without a slope toward the sump and waste pump. Upon review, the
Engineer confirmed that the sloped floor—typically required by the Minnesota Department of Health (MDH) for solids
removal and drainage—had been unintentionally omitted from the bidding documents and was also not flagged during
MDH plan approval.
Sloping the tank floor is a standard industry practice recommended by the American Water Works Association (AWWA)
to improve drainage, enhance solids removal, and reduce long-term maintenance.
To provide proper functionality and avoid costly potential future retrofits, the Engineer recommends incorporating the
sloped floor at this stage. Because the work is most efficiently completed before the tank’s top slab is poured, this
change is considered to be on the project’s critical path and is being submitted for immediate Council consideration.
This proposal includes all labor and materials associated with the sloping modification and reflects an increase of
$41,262.85, along with a 7-day extension to the construction contract.
COR 012
The Contractor requested removal of the waterstop along the top of the backwash tank interior walls to improve
constructability. After review, the Engineer deemed the removal of the waterstop at this location to be acceptable
because the joint is above the high-water elevation of the tank’s operations. This proposal reflects a deduction of
$917.68 for the labor savings associated with omitting the waterstop installation. Material costs are excluded, as the
waterstop had already been purchased and cannot be returned.
The proposed net increase in project cost for these change orders is $30,456.76 and a 7-day extension to the
construction contract. This amount represents a 0.45% increase over the bid cost and would bring the total change order
net increase to 1.23% for the project.
SUPPORTING DOCUMENTS ATTACHED:
• Detailed proposals for Change Order Request 005R1, 008, 009, & 012
• AE2S Council presentation slides
POSSIBLE MOTION
PLEASE WORD MOTION AS YOU WOULD LIKE IT TO APPEAR IN THE MINUTES:
Motion to approve Change Order Proposals as indicated in the table above in the amount of $30,456.76 to Market &
Johnson and grant a 7-day extension to the Substantial and Final Completion dates.
BUDGET INFORMATION
FUNDING: BUDGETED:
Fund 601 – Drinking Water Utility Yes
TO: DATE:
RE:Change Order Request (COR) #012
ATTN:
REQUESTED BY WHOM:
COST OF WORK:
Changes to Market & Johnson's Scope of Work (see attached breakdown)…………...($917.68)
OVERALL CHANGE TO PROJECT ($917.68)
The Contract Time will be unchanged by zero days for this change.
This proposal may be withdrawn by us if not accepted within 30 calendar days.
Assistant Project Manager
Enclosures
cc:
Joey Koller
COMMENTS /
ADD'L NOTES
There is no cost deduction for the waterstop material as this was already onsite for the designated
areas.
Sincerely,
MARKET & JOHNSON, INC.
M&J Project #3416
Market & Johnson, Inc. 2350 Galloway Street PO Box 630 Eau Claire, WI 54702-0630 Ph. 715.834.1213 Fax. 715.834.2331
CHANGE ORDER REQUEST (COR)
Advanced Engineering and Environmental
Services, LLC
6901 E Fish Lake Road Suite 184
Maple Grove, MN 55369
July 17, 2025
Otsego Wellhouse No. 4 Water Treatment
Improvements
Otsego, MN
Ryan Hanson
DESCRIPTION
OF CHANGE:
Backwash Tank Water stop Removal Per RFI #19
TIME:
If you would like us to proceed with this work prior to a
formal change order being processed, please check the
accepted box, sign and return. If accepted, this will be
included on a future change order.
□Accepted □Not Accepted
_____________________________ ______________
Signature Date
Breakdown for Change Order Request (COR) #012 by Market & Johnson
Dated: 07/17/2025
M&J
Contract
Tax Exempt
Purchases
Owner Direct
Purchases
SUBCONTRACTED WORK SCOPE OF WORK
$0.00 $0.00 $0.00
SELF PERFORMED QTY U/M UNIT COST
$0.00
(8.00) HRS $107.490 ($859.92)
$0.00
$0.00
($859.92)
0.00% ($6.11)
($8.66)
0.00% ($42.99)
0.00% $0.00
Net Change ($917.68) $0.00 $0.00
TOTAL OVERALL CHANGE TO PROJECT ($917.68)
Mark-up on Self Performed Work
Additional G/L Insurance Required
Additional Payment/Performance Bond
Mark-up on Subcontracted Work
Subtotal of Self Performed Work
Subtotal of Subcontracted Work
Labor
Carpenter
M&J Project #3416
Otsego Wellhouse No. 4 Water Treatment Improvements
Otsego, MN
TO: DATE:
RE:Change Order Request (COR) #009
ATTN:
REQUESTED BY WHOM:
COST OF WORK:
Changes to Market & Johnson's Scope of Work (see attached breakdown)…………...$41,262.85
OVERALL CHANGE TO PROJECT $41,262.85
The Contract Time will be INCREASED by 7 working days for this change
This proposal may be withdrawn by us if not accepted within 10 calendar days.
Assistant Project Manager
Enclosures
cc:
Sincerely,
MARKET & JOHNSON, INC.
Joey Koller
DESCRIPTION
OF CHANGE:
RFP#08 - Grout Sloping at Reclaim Tank
TIME:
COMMENTS /
ADD'L NOTES
The 7 day increase stated above assumes that Market & Johnson has full approval to proceed and
pour the grout on 07/30.
Market & Johnson, Inc. 2350 Galloway Street PO Box 630 Eau Claire, WI 54702-0630 Ph. 715.834.1213 Fax. 715.834.2331
CHANGE ORDER REQUEST (COR)
Advanced Engineering and Environmental
Services, LLC
6901 E Fish Lake Road Suite 184
Maple Grove, MN 55369
July 17, 2025
Otsego Wellhouse No. 4 Water Treatment
Improvements
Otsego, MN
Ryan Hanson
M&J Project #3416
If you would like us to proceed with this work prior to a
formal change order being processed, please check the
accepted box, sign and return. If accepted, this will be
included on a future change order.
□Accepted □Not Accepted
_____________________________ ______________
Signature Date
Breakdown for Change Order Request (COR) #009 by Market & Johnson
Dated: 07/17/2025
M&J
Contract
Tax Exempt
Purchases
Owner Direct
Purchases
SUBCONTRACTED WORK SCOPE OF WORK
$4,177.80
$4,177.80 $0.00 $0.00
SELF PERFORMED QTY U/M UNIT COST
$0.00
8.00 HRS $98.080 $784.64
34.00 HRS $107.490 $3,654.66
14.00 HRS $118.260 $1,655.64
60.00 HRS $110.570 $6,634.20
1.00 LS $3,103.000 $3,103.00
$0.00
69.85 CY $185.000 $12,922.25
1,400.00 SF $0.150 $210.00
20.00 LF $1.000 $20.00
1.00 LS $1,170.000 $1,170.00
1.00 LS $1,300.000 $1,300.00
$31,454.39
0.71% $252.99
$358.85
15.00% $4,809.93
5.00% $208.89
Net Change $41,262.85 $0.00 $0.00
TOTAL OVERALL CHANGE TO PROJECT $41,262.85
Materials
Mark-up on Self Performed Work
Additional G/L Insurance Required
Additional Payment/Performance Bond
Mark-up on Subcontracted Work
Ladder Modifications
Subtotal of Self Performed Work
Edge Form
Grout
Indirects
Subtotal of Subcontracted Work
Labor
Laborer
Carpenter
Cement Finisher - Leader
DK Mechanical
Cement Finisher
Bonding Agent
Equipment
M&J Project #3416
Otsego Wellhouse No. 4 Water Treatment Improvements
Otsego, MN
1
Ana Sebesta
From:Joey Koller
Sent:Thursday, July 17, 2025 8:07 AM
To:Ashley Carlson
Cc:Ana Sebesta
Subject:Fw: Otsego Backwash Tank Slopped Floor
Get Outlook for iOS
Joey Koller
Assistant Project Manager
Mobile: 715-563-5945 • Main: 715-834-1213
www.market-johnson.com
GENERAL CONTRACTORS • CONSTRUCTION MANAGERS
From: Kyle Nikula <kyle_nikula@dkmechanical.org>
Sent: Thursday, July 17, 2025 6:57:13 AM
To: Joey Koller <jokoller@market-johnson.com>
Subject: Otsego Backwash Tank Slopped Floor
Hey Joey,
I'm out at a site today but wanted to get something over to you for the added grout in the backwash
tank. With the slopped floor we will need to build scaffolding with adjustable legs and add pick points for
hoisting our pipe. Below is what I have figured.
24 pick points a 12 MH at $125.00 = $1,500.00
Material $148.00
Scaffolding labor 16 MH at $125.00 $2,000.00
Scaffolding 2 weeks $150.00
Total $3,798.00 x 1.1 =$4,177.80
Thanks!
Kyle Nikula
DK Mechanical Contractors LLC
Business Manager
TO: DATE:
RE:Change Order Request (COR) #008
ATTN:
REQUESTED BY WHOM:
COST OF WORK:
Changes to Market & Johnson's Scope of Work (see attached breakdown)…………...($5,086.14)
OVERALL CHANGE TO PROJECT ($5,086.14)
The Contract Time will be unchanged by zero days for this change.
This proposal may be withdrawn by us if not accepted within 30 calendar days.
Assistant Project Manager
Enclosures
cc:
Joey Koller
COMMENTS /
ADD'L NOTES
Sincerely,
MARKET & JOHNSON, INC.
M&J Project #3416
Market & Johnson, Inc. 2350 Galloway Street PO Box 630 Eau Claire, WI 54702-0630 Ph. 715.834.1213 Fax. 715.834.2331
CHANGE ORDER REQUEST (COR)
Advanced Engineering and Environmental
Services, LLC
6901 E Fish Lake Road Suite 184
Maple Grove, MN 55369
July 17, 2025
Otsego Wellhouse No. 4 Water Treatment
Improvements
Otsego, MN
Ryan Hanson
DESCRIPTION
OF CHANGE:
RFP#05 - Modifications to Valves and Piping
TIME:
If you would like us to proceed with this work prior to a
formal change order being processed, please check the
accepted box, sign and return. If accepted, this will be
included on a future change order.
□Accepted □Not Accepted
_____________________________ ______________
Signature Date
Breakdown for Change Order Request (COR) #008 by Market & Johnson
Dated: 07/17/2025
M&J
Contract
Tax Exempt
Purchases
Owner Direct
Purchases
SUBCONTRACTED WORK SCOPE OF WORK
($4,766.00)
$0.00
($4,766.00) $0.00 $0.00
SELF PERFORMED QTY U/M UNIT COST
$0.00
$0.00
$0.00
$0.00
0.00% ($33.84)
($48.00)
0.00% $0.00
0.00% ($238.30)
Net Change ($5,086.14) $0.00 $0.00
TOTAL OVERALL CHANGE TO PROJECT ($5,086.14)
Mark-up on Self Performed Work
Additional G/L Insurance Required
Additional Payment/Performance Bond
Mark-up on Subcontracted Work
Subtotal of Self Performed Work
Subtotal of Subcontracted Work
Kurita
DK Mechanical
M&J Project #3416
Otsego Wellhouse No. 4 Water Treatment Improvements
Otsego, MN
Kurita America Inc.
6600 94th Avenue North Minneapolis, MN 55445
www.kuritaamerica.com 866-663-7633
7/17/25
Joey Koller
Market and Johnson
RE: Otsego Wellhouse No. 4 - Request for Quote - COR#08
Dear Joey,
Per our previous discussions, we have investigated the costs associated with making the
changes you requested and summarized them below.
Kurita to provide a credit of $4366 for substituting two 10” butterfly valves with actuator for two
10” butterfly valves with manual handwheels.
Kurita to provide a credit of $400 to replace a 12”x10” reducing spool and 10” elbow with a
extended 12” spool and 12”x10” reducing elbow.
Total credit $4766.
Signing below and returning this change order request will be deemed as acceptance, a formal
change to the contract can follow. Please be advised that the existing contractual terms and
conditions will apply to this change order.
Sincerely,
Customer Acceptance
Nate Haglund
Project Manager
n.haglund@kurita-water.com
Date
TO: DATE:
RE:Change Order Request (COR) #005
ATTN:
REQUESTED BY WHOM:
COST OF WORK:
Changes to Market & Johnson's Scope of Work (see attached breakdown)…………...($4,802.27)
OVERALL CHANGE TO PROJECT ($4,802.27)
The Contract Time will be unchanged by zero days for this change.
This proposal may be withdrawn by us if not accepted within 30 calendar days.
Assistant Project Manager
Enclosures
cc:
Joey Koller
COMMENTS /
ADD'L NOTES
Sincerely,
MARKET & JOHNSON, INC.
M&J Project #3416
Market & Johnson, Inc. 2350 Galloway Street PO Box 630 Eau Claire, WI 54702-0630 Ph. 715.834.1213 Fax. 715.834.2331
CHANGE ORDER REQUEST (COR)
Advanced Engineering and Environmental
Services, LLC
6901 E Fish Lake Road Suite 184
Maple Grove, MN 55369
May 14, 2025
Otsego Wellhouse No. 4 Water Treatment
Improvements
Otsego, MN
Ryan Hanson
DESCRIPTION
OF CHANGE:
RFQ #03, Switching Chemical Feed Pumps
TIME:
If you would like us to proceed with this work prior to a
formal change order being processed, please check the
accepted box, sign and return. If accepted, this will be
included on a future change order.
□Accepted □Not Accepted
_____________________________ ______________
Signature Date
Breakdown for Change Order Request (COR) #005 by Market & Johnson
Dated: 05/14/2025
M&J
Contract
Tax Exempt
Purchases
Owner Direct
Purchases
SUBCONTRACTED WORK SCOPE OF WORK
($4,500.00)
$0.00
($4,500.00) $0.00 $0.00
SELF PERFORMED QTY U/M UNIT COST
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
0.00% ($31.95)
($45.32)
0.00% $0.00
0.00% ($225.00)
Net Change ($4,802.27) $0.00 $0.00
TOTAL OVERALL CHANGE TO PROJECT ($4,802.27)
Mark-up on Self Performed Work
Additional G/L Insurance Required
Additional Payment/Performance Bond
Mark-up on Subcontracted Work
Subtotal of Self Performed Work
Subtotal of Subcontracted Work
Great Northern Environmental
DK Mechanical
M&J Project #3416
Otsego Wellhouse No. 4 Water Treatment Improvements
Otsego, MN
1
Ana Sebesta
From:Andy Wrzos <AWrzos@gnenv.com>
Sent:Wednesday, May 7, 2025 8:09 PM
To:Joey Koller
Cc:Ashley Carlson
Subject:RE: 3416 - Otsego Wellhouse No. 4 - Request for Quote - COR#05
Hi Joey,
Sorry for the delay in this. For making the switch to the pump selected it provides a deduct to M&J of
$4,500.00 for the 4 pumps per COR#05. This is already incorporated into the submittal for the chem feed
packages.
If you want to send over the deductive CO for GNE to sign, I can get it back to you.
Thanks!
Andy Wrzos – Project Manager – Inside Sales
Office: (651) 289-9100
Cell: (763) 226-0317
Email: awrzos@gnenv.com
Great Northern Environmental
1300 Helmo Ave N, Oakdale, MN 55128
See us on the web at www.gnenv.com
From: Joey Koller <jokoller@market-johnson.com>
Sent: Monday, May 5, 2025 6:29 PM
To: Andy Wrzos <AWrzos@gnenv.com>
Cc: Ana Sebesta <asebesta@market-johnson.com>; Cory Fedder <cfedder@market-johnson.com>; Ashley Carlson
<acarlson@market-johnson.com>
Subject: RE: 3416 - Otsego Wellhouse No. 4 - Request for Quote - COR#05
Importance: High
Andy,
Please provide an update on the price changes related to FRP #03 as soon as possible. I will need to get
this wrapped up this week.
Thank you,
1
Ana Sebesta
From:Kyle Nikula <kyle_nikula@dkmechanical.org>
Sent:Thursday, February 27, 2025 6:25 PM
To:Ashley Carlson
Cc:Joey Koller; Ainslie Cleveland; Cory Fedder; Ana Sebesta
Subject:RE: 3416 - Otsego Wellhouse No. 4 - Request for Quote - COR#05
Ashley,
No change in price on our end.
Thanks!
Kyle Nikula
DK Mechanical Contractors LLC
Business Manager
952-495-0114
PO Box J | Dassel, MN 55325
This e-mail and the information contained in it is intended only for the use of the individual or entity named above and may contain information that is
confidential, privileged, and exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any
disclosure, copying, distribution, or use of any of the information contained in this transmission is strictly prohibited. If you have received this
transmission in error, please notify me by e-mail at the above address and discard of the information. Thank you.
From: Ashley Carlson <acarlson@market-johnson.com>
Sent: Friday, February 21, 2025 11:05 AM
To: AWrzos@gnenv.com; Kyle Nikula <kyle_nikula@dkmechanical.org>
Cc: Joey Koller <jokoller@market-johnson.com>; Ainslie Cleveland <acleveland@market-johnson.com>; Cory Fedder
<cfedder@market-johnson.com>; Ana Sebesta <asebesta@market-johnson.com>
Subject: 3416 - Otsego Wellhouse No. 4 - Request for Quote - COR#05
Otsego Wellhouse No. 04 Water Treatment Improvements
Otsego, MN
REQUEST FOR QUOTE FOR COR #05
The Architect has issued Request for Proposal (RFP) #03, which is attached, and has requested a
formal proposal be submitted for this work.
WELLHOUSE 4 WTP
CHANGE ORDER REQUESTS
Presented by: Advanced Engineering and Environmental Services, LLC (AE2S)
July 28, 2025
SUMMARY OF CHANGE ORDERS
Otsego Council Meeting - July 28, 2025 2
COR 009 (+$41,262.85)
•Summary: Add grout to
slope backwash tank floor
toward sump and waste
pump
•Industry standard design
practice (AWWA)
•Assists spray wash system
and improves drainage and
sludge removal
•Important for radium
removal and reduces manual
cleaning by operators
•Unintentionally omitted in
bidding documents and
noticed to be missing in the
field Otsego Council Meeting - July 28, 2025 3
•MDH requires provisions for solids
removal (typically sloping)
–Not flagged in MDH plan approval
•Critical path item (top mat slab)
•+$8,000 to do after top slab
COR 005R1, COR 008, & COR 012
•COR 008 (-5,086.14)
–Changing two valves within the WTP from electrically
operated to manual handwheel
•COR 005R1 (-$4,802.27)
–City directed item to switch chemical feed pumps
from peristaltic to diaphragm style pumps for
consistency with other City locations
•COR 012 (-917.68)
–Constructability adjustment to top of backwash tank
interior walls
Otsego Council Meeting - July 28, 2025 4
QUESTIONS?
Otsego Martin Farms Lift Station Improvements