Item #07 Approval of Change Order No. 2 for Lift Station 7 and Force Main Relocation Project
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AGENDA ITEM COVER SHEET
Meeting Date: April 21, 2009
Item # .,
Contact Name:
Contact Number:
David Wheeler
407 -905-3100, ext. 1504
Reviewed By: ~~
Department Director: ~L, ~~lr
City Manager: _ _ ~ =-=-=
Subject: Approval of and authorization for the Mayor to execute Change Order NO.2 for the Lift Station
7 and Force Main Relocation Project, and to authorize the funds required to implement the change order.
Background Summary:
Lift Station 7 handles 60% of the sanitary sewer flows in the City system. The existing force main on SR
50 that receives the output from Lift Station 7 is subject to frequent breaks due to pipe wall fatigue, and
the wet well of the lift station is seriously damaged by spalling caused by the corrosive atmosphere in the
structure. A project was initiated last year to replace the existing 12-inch force main located along the
northern SR 50 right of way with a 16-inch line located further north that would connect a rehabilitated Lift
Station 7 to an existing force main on Clarke Road.
The decision was made in November 2008 to relocate Lift Station 7 rather than rehabilitate the existing
facility. Relocation meant that a new Lift Station 7 would be built north of the current location so as to
more readily facilitate development of the surrounding property. The initial design for the new lift station
was based on 8-inch stand piping; however, due to the facility's high flows, the station's internal piping
needs to be increased to 10-inch. In addition, it is desired to increase emergency by-pass pumping pipe
size from 4 inches to 10 inches. Pricing for Change Order No. 1 was based on the 8- and 4-inch
combination of pipe and fittings. Collectively, all revisions included in this change order total less than
3% of overall project costs.
Due to size of the lift station, standby generation is required and the City Commission previously
approved the purchase of a new generator. The configuration of the selected generator is larger than
previously considered, thus the generator slab (future building foundation) requires upsizing. Upon
development of the site, a building will be constructed to enclose the generator and control panel. Also,
subsurface conditions encountered at the new lift station location mandated that mechanical dewatering
be accomplished prior to and during construction of the wet well. Finally, tying in the new lift station
gravity system to the SR 50 collection system will result in a period of time when the contractor will need
to pump effluent around the old lift station as the gravity sewer line from SR 50 is connected to the
gravity line installed from the new lift station.
Issue:
The Engineering Department has proposed a change order to implement the project modifications
identified in cooperation with the Utilities Department. Both involved City departments have reviewed the
proposed prices for new bid items and believe them to be reasonable and comparable; other prices were
established in the contract bid or previous change order.
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Two subsequent change orders should be expected for this project. The first will add a short extension
to the new force main so as to connect it to the output of the Health Central complex on Blackwood
Avenue at SR 50. Once that is accomplished, a subsequent change order will be required to take the old
force main along the north side of SR 50 out of service and put it into a stable condition.
Recommendations
The Engineering and Utilities Departments recommend that the City Commission approve the proposed
Change Order No.2, authorize the Mayor and City Clerk to execute the required legal documents, and
direct the Finance Department to make the related fund allocations to the project budget and to revise
the purchase order issued to the Contractor to reflect the increase in project budget. Implicit in these
actions is approval of the related revisions to the "2003 Issue Bond Project Schedule."
Attachments:
Proposed Change Order NO.2.
Financial Impact:
The $35,632.38 in funding for this action will be derived from a reallocation of funds from the Utility Bond
Issue.
Type of Item: (please mark with an "x'J
Public Hearing
Ordinance First Reading
Ordinance Second Reading
Resolution
_ Commission Approval
Discussion & Direction
For Clerk's Deot Use:
_____ Consent Agenda
Public Hearing
_____ Regular Agenda
X Original Document/Contract Attached for Execution by City Clerk
== Original Document/Contract Held by Department for Execution
Reviewed by City Attorney
Reviewed by Finance Dept.
Reviewed by ( )
~~
N/A
N/A
N/A
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CITY OF OCOEE
150 North Lakeshore Drive
Ocoee, Florida 34761
CITY OF OCOEE
CHANGE ORDER NO.2
LIFT STATION NO.7 AND FORCE MAIN RELOCATION
DATE: April 14, 2009
CONTRACTOR: GWP Construction, Inc., Ocala, FL
NOTICE TO PROCEED DATE: October 15, 2008
The following changes are hereby made to the CONTRACT DOCUMENTS.
Original CONTRACT PRICE $1.012.040.80
Current CONTRACT PRICE ADJUSTED by previous CHANGE ORDER $1.199.879.30
Net Increase (Decrease) Resulting from this CHANGE ORDER $35.632.38
The current CONTRACT PRICE including this CHANGE ORDER $1.235.511.68
Original CONTRACT COMPLETION DATE: Julv 22. 2009
Current CONTRACT COMPLETION DATE adjusted by previous
CHANGE ORDERS July 22. 2009
Net Increase Resulting from this CHANGE ORDER 0 days
Current CONTRACT COMPLETION DATE including this
CHANGE ORDER Julv 22. 2009
Lift Station 7 & Force Main Relocation, Change Order #2 1
CHANGES ORDERED:
I. REQUIRED CHANGES
Three events have occurred to impose higher project costs. Piping and fittings are being upsized
from 8-inch to lO-inch diameter in order to provide sufficient flow capacity. The deep wet-well
required dewatering. A larger concrete slab is required to support the standby generator. Bypass
pumping is necessary in order to divert flows around the old lift station as the inflow pipe is
redirected to the new lift station without interruption of service.
II. JUSTIFICA nON
The decision was made in November 2008 to relocate Lift Station 7 rather than rehabilitate the
existing facility. The initial design was based on 8-inch piping within the new lift station;
however, more recent modeling of facility flows indicated that 10-inch piping was required.
Pricing for Change Order No.1 was based on the 8-inch pipe and fittings. With a concurrent
increase to lO-inch pumps in order to achieve the required flow rates, the facility will require a
standby generator with a higher power output and a subsequent increase in the size of the
building that encloses it. Subsurface conditions encountered at the new location mandated that
mechanical dewatering be accomplished prior to and during lift station wet-well construction.
Tying in the new lift station will result in a period of time when the contractor will need to pump
effluent around the old lift station as the gravity sewer line from SR 50 is connected to the
gravity installed to the new lift station.
III. NARRATIVE OF NEGOTIATIONS
Change order is based on mutual agreement by the parties and actual contractor costs. The
Engineering and Utilities departments were involved in the negotiations.
IV. PAYMENT
The following bid items are hereby added to the contract in the quantities shown.
Item No. Descrintion Quantity Unit Unit Price Price
COlI Upsize lift station I Lump Sum $20,481.3 8 $20,481.3 8
pipe and fittings
COl2 Mechanical I Lump Sum $6,600.00 $6,600.00
dewatering
Increase in
COB generator 1 Lump Sum $1,021.00 $1,021.00
foundation size
COl4 Gravity sewer 1 Lump Sum $7,530.00 $7,530.00
bypass pumping
TOTAL $35,632.38
Lift Station 7 & Force Main Relocation, Change Order #2
2
V. APPROVAL AND CHANGE AUTHORIZATION
This proposed change to the Contract is to be approved by the City of Ocoee Commission. The
aforementioned changes, and work affected thereby, are subject to all provisions of the original
contract not specifically changed by this Change Order. It is expressly understood and agreed
that the approval of the Change Order shall have no effect on the original contract other than
matters expressly provided herein.
CONTRACTOR acknowledges, by its execution and acceptance of this Change Order, that the
adjustments in Contract Price and Time shown hereon constitute full and complete compensation
and satisfaction for all costs and modifications of performance time incurred by the
CONTRACTOR as a result of this Change Order. No other claim for increased costs of
performance or modifications oftime will be granted by the OWNER for the Work covered by
this Change Order. The CONTRACTOR hereby waives and releases any further claims for cost
or time against the OWNER arising from or relating to the matters or Work set forth or
contemplated by this Change Order.
RECOMMENDED BY:
ACCEPTED BY:
CITY OF OCOEE. FLORIDA
GWP CONSTRUCTION. INC.
By:
By:
Signature
Signature
Date:
Date:
Title:
Title:
APPROVED BY:
CITY OF OCOEE. FLORIDA
Owner
By:
Date
Attest:
FOR USE AND RELIANCE ONLY BY THE
CITY OF OCOEE, APPROVED AS TO FORM
AND LEGALITY THIS DAY OF
,2009.
APPROVED BY THE CITY OF OCOEE
COMMISSION IN A MEETING HELD ON
, 2009 UNDER
AGENDA ITEM NO.
By:
City Attorney
END OF CHANGE ORDER NO 2
Lift Station 7 & Force Main Relocation, Change Order #2
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Page 1 of 1
Butler, AI
From: Brad McCullough [BradM@gwpconstruction.com]
Sent: Monday, April 13, 20092:28 PM
To: Smith, Charles
Cc: ocoee2809; Butler, AI
Subject: Building Pad - Revised
Charles,
The upgrade for the larger generator / building pad is $1,021.00 this should complete the numbers for the change
order, Please review & comment.
Lift Station / Yard Fittings & Valves - $27,081.00
By Pass Pumping - $7,530.00
Generator / Building Pad - $1,021.00
Total - $35,632.00
Thanks,
D
Brad McCullough
Project Coordinator
GWP Construction, Inc.
352-351-2412
fax 352-351-2430
cell 352-258-1364
As a reminder our new mailing address is 4269 NW 44th Ave, Suite A Ocala, FL 34482
4/14/2009
GWP CONSTRUCTION, INC
4269 NW 44th Ave, Suite A
Oeala, FL 34482
352-351-2412 Fax 352-351-2430
April 3, 2009
City of Ocoee
150 North Lakeshore Drive
Ocoee, FL. 34761
Attn: AI Butler
Subject: Lift Station # 7 Relocation
Re: PCO 2809-002
Material Size Increase
AI,
Per our March 24,2009 meeting, I have prepared the following information regarding; lift station &
yard piping & fittings. I have also included the loss of dewatering charges when the future FM
connection and flow meter was deleted from change order # 1.
Lift Station PiDina & Fittinas
Lift Station Pipe & Fittings (original quote with 8" material) $17,240.16
Lift Station Pipe $ Fittings (revised quote with 10" material) $25,592.49
Net Increase for Lift Station Pipe & Fittings $8,352.33
Yard PiDina & Fittings
Yard Piping & Fittings (original quote with 8" material with 4" pump off) $14,077.10
Yard Piping & Fittings (revised quote with 10" material with 8" pump off) $26,206.15
Net Increase for Yard Piping & Fittings $12,129.05
Note: 10" pump off is not offered; therefore 8" pump off is quoted
De-Waterina (Well Points Deleted in Chanae Order # 1)
Future FM Connection $2,200.00
Flow Meter $4,400.00
Net Increase for De-Watering $6,600.00
I Net Change Order Requested
$27,081.38 I
GWP CONSTRUCTION, INC
4269 NW 44th Ave, Suite A
Ocala, FL 34482
352-351-2412 Fax 352-351-2430
Please let me know if you have any questions or concerns regarding the above.
Thanks,
Brad McCullough
Project Coordinator
GWP Construction
Page 1 of2
Butler, AI
From: Brad McCullough [BradM@gwpconstruction.com]
Sent: Wednesday, April 08, 2009 8:38 AM
To: Smith, Charles
Cc: Butler, AI; ocoee2809
Subject: RE: Material Size Increase
Charles,
I have listed (below) the cost for by-pass pumping (turn Key):
(1) High Pressure Sewage Pump 1,540 GPM
(1) High Pressure Sewage Pump 1,540 GPM (Stand-by Unit)
(1) Auto Dialer Remote Notification System
(2) Auto Start/Stop Float System W/Rail
(2) 6" x 20' Suction Hoses W/Strainers
(1) 6" - 150' High Pressure Discharge Hose (Discharge into MH # 6)
(1) 6" Manifold with Valves
(1) 6" Spool Flange with ARV and Pressure Gauge
* Fuel Throughout the by-pass
* Labor to Maintain the Pumps
Cost - $7,530.00 (Weekly Rental Rate)
Thanks,
D
Brad McCullough
Project Coordinator
GWP Construction, Inc.
352-351-2412
fax 352-351-2430
cell 352-258-1364
As a reminder our new mailing address is 4269 NW 44th Ave, Suite A Ocala, FL 34482
From: Smith, Charles [mailto:CSmith@ci.ocoee.f1.us]
Sent: Tuesday, April 07, 2009 8:01 AM
To: Brad McCullough
Cc: Butler, AI
Subject: RE: Material Size Increase
Where is by-pass pumping?
From: Brad McCullough [mailto:BradM@gwpconstruction.com]
Sent: Tuesday, April 07, 2009 7:43 AM
To: Butler, AI
4/13/2009
Page 2 of2
Cc: Smith, Charles; ocoee2809
Subject: Material Size Increase
AI,
Please find the attached letter regarding material size increase.
Thanks,
DSrad McCullough
Project Coordinator
GWP Construction, Inc.
352-351-2412
fax 352-351-2430
cell 352-258-1364
As a reminder our new mailing address is 4269 NW 44th Ave. Suite A Ocala, FL 34482
4/13/2009