12/17/2002 Resolutions 2002-385
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RESOLUTION 2002-385
WHEREAS, on July 23, 2002, by Resolution 2002-220, the City Council for the City
of Grand Island awarded the bid for boiler inspection and repair at Platte Generating Station to
Moorhead Machinery & Boiler Company of Minneapolis, Minnesota; and
WHEREAS, it has been determined that modifications to the work to be performed by
Moorhead Machinery & Boiler Company are necessary; and
WHEREAS, such modifications have been incorporated into Change Order No.1 and
shown on Exhibit "A" attached hereto; and
$98,512.57.
WHEREAS, the result of such modifications will increase the contract amount by
NOW, THEREFORE, BE IT RESOLVED BY THE MAYOR AND COUNCIL OF
THE CITY OF GRAND ISLAND, NEBRASKA, that the Mayor be, and hereby is, authorized and
directed to execute Change Order No.1, between the City of Grand Island and Moorhead Machinery
& Boiler Company of Minneapolis, Minnesota to provide the modifications as identified on the list
attached hereto as Exhibit "A",
Adopted by the City Council of the City of Grand Island, Nebraska on December 17,2002
Q~~~
RaNae Edwards, City Clerk
Approved as to Form" .'tvh~
December 12, 2002 ... City AtfOrney
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City of Grand Island
Utilities Department
Boiler Inspection and Repair Contract Change Order
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Item
1
(submitted with Memo 12/3/02)
Description
Drip screens - The bid included replacing the drip screens at the top of the ash hopper.
The screens were furnished by the City and it was found when the boxes were opened
that the screens were the wrong size. This is a credit for the labor included in the bid.
Steam cooled spacer tube - The steam cooled spacer tube was ordered from Alstom
Power and was delivered with more welding required than expected when the boiler
work was bid.
Burner repairs - There was much more repair required to the 4 burner corners than was
included in the bid. 12 of the 16 stationary coal nozzles were replaced, 4 stationary
coal nozzles were relocated, 16 coal nozzle tips were replaced, and some linkage was
replaced.
Replace straight coal pipe - The bid included replacing 13 coal pipe elbows furnished by
the City. When the elbows were cut out some adjacent straight pipe was found to be
eroded and needed replacement.
Replace coal pipe elbow - One additional coal pipe elbow was found to be eroded.
Install coal pipe gates - Three gates were installed in the coal pipes so the pipes can be
quickly closed and the pulverizers isolated to allow safe repair work.
Crossover tubes - It was discovered that an additional 18 inches needed to be welded
to each of the crossover tubes furnished by the City to replace all the eroded tubes.
Air heater baskets - The cold end air heater baskets were found to be eroded and it was
recommended by the Air Preheater Co. serviceman that their life could be extended by
turning them over.
Tube shields at sootblower IK-4 - It was necessary to install 1 07 tube shields to protect
the tubes from erosion.
Tube shields at sootblower IK-14 - It was necessary to install 45 tube shields to protect
the tubes from erosion.
Turbine studs - This contractor had the air arc equipment available so was assigned to
remove broken studs from the turbine shell.
Tube shields ats00tblowers IK-2 & IK-3 - It was necessary to install 30 tube shields to
protect the tubes from erosion.
Install membrane - Install a peg fin membrane between the tubes on the upper slope of
the boiler to prevent erosion of the refractory.
Pad weld tubes - It was discovered that sootblower IK-12 had caused tube erosion past
the end of the tube shields in the horizontal superheat section of the boiler. The tubes
were pad welded and additional tube shields were installed.
Tube shields at sootblowers IK-7, IK-9, & IK-10 - It was necessary to instil tube shields
to protect the tubes from erosion.
Boiler access door - Install a boiler access door furnished by the City on the south side
of the boiler to allow inspection and repair to the area next to sootblower IK-12. Drawings
were not available prior to the bidding.
Furnish ceramic rope - This is the only source that could deliver the material in time.
Sales tax - This is the difference between the sales tax on material included with the
bid and the sales tax actually paid on material.
Additional bonding costs
2
3
4
5
6
7
8
9
10
11
12
13
19
Amount
$ (5,579.41)
$ 527.28
$ 39,308.63
$ 3,510.91
$ 2,767.19
$ 3,494.51
$ 2,227.85
$ 8,031.08
$ 2,541.21
$ 5,619.23
$ 1,330.37
$ 4,525.72
$ 4,742.84
$ 8,164.26
$ 2,936.89
$ 12,677.00
$ 2,350.00
$ (1,012.39)
$ 349.40
Total $ 98,512.57
Exhibit "A"