HomeMy WebLinkAboutResolution No. 4287, Change Order 14 for Lower Yards, HRDC Bus Barn.pdf
Commission Memorandum
REPORT TO: Honorable Mayor and City Commission
FROM: James Goehrung, Director of Facility Services
Chuck Winn, Assistant City Manager
SUBJECT: Approve Resolution 4287 authorizing the City Manager to sign
Change Order #14 for the Lower Yard Vehicle Maintenance and HRDC Bus Barn for
mechanical systems modifications, the addition of a ventilation fan, additional concrete work,
and a yard light for the sand storage building.
MEETING DATE: September 20, 2010
AGENDA ITEM TYPE: Consent
RECOMMENDATION: Approve Resolution 4287 authorizing the City Manger to sign
Change Order #14 in the amount of $25,118.44, for the Lower Yard Vehicle Maintenance and
HRDC Bus Barn for mechanical systems modifications for the roof drainage collection system,
CP#26; a unit heater change, CP#28; revised fresh air duct work for the oil burner, CP#29; the
addition of a shop ceiling fan, CP#30; modifications to the slab over the rainwater tank, CP#34;
and a yard light for the sand storage building, CP#36. Total city portion of this change order is
$25,118.44.
BACKGROUND: This change order includes three mechanical related items. CP#26 is a
modification of the sump and strainer valve on the rainwater collection system. The rainwater is
collected into a piped system from three locations on the central roof. These three pipes then
flow into one large pipe than runs through this sump valve prior to draining into the collection
tank. In order to keep debris out of the tank the sump has a screen installed to collect any solid
materials. This change is for a finer screen that will filter out smaller particles protecting the
tank and pump from solid materials. The sump specified in this change has a better access point
to get to the screen which improves the ability to maintain the screen and clean it which will be a
major benefit for long term maintenance of the unit. Cost for this improved sump is $1,815.55.
CP#28 addresses a bidding error. The mechanical engineer listed an incorrect model number in
the bid. The mechanical sub bid this model in the original bid. When the submittal was
reviewed it was determined that this model did not meet the specified requirements for the area
to be serviced by this heater. The correct model was rebid at the correct size which was a larger
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unit and has a different mounting system. The difference in price between these two models is
$2,167.72.
CP#29 modifies the fresh air intake on the waste oil burner. The subcontractor responsible for
the waste oil burner had more direct experience with these systems that did the mechanical
engineer. The cost for this change is for the cost of the materials and labor to reroute the fresh
air intake for the waste oil burner. The reroute will improve the flow of air into the boiler and
improve its overall operation and reduce maintenance costs by reducing the amount of soot in the
flue. The reroute will also be an improvement because it will not be a roof penetration, which
are more vulnerable to leaking, and will be moved further away from the exhaust vents from the
other equipment. This cost will be shared 50%/50% with HRDC for a total cost to the city of
$3,758.10.
CP#30 is for an owner initiated change for a shop ceiling fan. The primary heat source for the
shop area is a radiant floor system. The ceiling height is over 20 feet in most areas of the shop.
Ceiling fans were initially discussed during the design phase of the project in order to provide
both ventilation and more even heat distribution from the warm air that will accumulate at the
ceiling level. The design team did not include the fan in the drawings and bid reviews did not
catch the omission. The fan has now been priced and will now be an owner initiated change.
A large scale single fan has been selected instead of the 8 smaller fans that were originally
considered for the size of the space. Cost for the fan and installation is $12,537.92.
CP#34 is for some additional concrete work for the rainwater collection tank. The tank requires
protection from both vehicle loads and depth and coverage requirements to prevent freezing. A
final location for the tank was determined around all the site configuration issues. This change is
form some addition concrete that was added to one of the garage approach aprons in order to
provide the needed protection for the tank. The city share of this cost is $670.48.
CP#36 is for the addition of a yard light pole for the sand storage building. When the sand
storage building was constructed there was no yard light for the loading area around building.
This light is being added to the project as a change order with the vehicle maintenance
contractor. This work is included in this change order but the cost will be paid directly by the
Street Department so it will not have an impact on the project contingency. Cost for the pole and
installation is $4,168.44.
UNRESOLVED ISSUES: None related to the items listed on this change order.
ALTERNATIVES: As suggested by the City Commission.
FISCAL EFFECTS: The costs associated with the items in this change order will be
paid out of the project contingency fund. CP#36 is included in the Change Order #14 but will be
paid directly by the Street Department. The summary of activity for the contingency fund is
shown below.
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Pre-Construction Change Orders $15,650.00
CO #4 Fire Alarm Design ($1,994.50)
CO#4 Welding Vent Hood ($5,000.00)
CO#5 Hose Bibs ($913.00)
CO#5 Utility Separation ($522.50)
CO#9 Electrical Panel and Heat Tape ($1,369.10)
TOTAL Pre–Const CO Balance Remaining $5,850.90
Project Contingency $128,501.70
Change Order #1 HRDC $0
Change Order #2 Asbestos Remediation ($3,294.32)
Asbestos Disposal ($1,545.50)
($4,839.82)
Chance Order #3 Added Site Work ($2,362.30)
Change Order #4 Costs above estimate for Welding Hood
(revised) Included in the Pre-Const COs ($2,560.23)
Change Order #5 Hose Bibs and Utility Separation
costs addressed in Pre-Construction
Change Order budget $0
Change Order #6 HRDC $0
Change Order #7 Modify the height of the parts counter and
install a sliding glass window between the
two work areas. ($1,097.80)
Change Order #8 Revise foundation sub-grade preparation
due to discover of unstable soils; Replace
fill material in clarifiers; Add a second
conduit run for phone and data. ($4,897.27)
Change Order #9 Electrical panel and heat tape Addressed
in the Pre-Construction Change Order
budget $0
Change Order #10 Grout plug on clay pipe in storm water
tank pit, $980.38; add three steel
bollards for building protection
$389.82 ($1,370.19)
Change Order #11 Add an additional shutoff air valve
for the compressed air valve, $424.60;
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Remove alternate No. 5 for the installation
of the skylights, ($12,200.00). $11,775.40
Change Order #12 Additional footing, foundation, and
reinforcement based on final building
structural analysis. ($6,059.27)
Change Order #13 Structural fill for footings, foundation,
road and parking areas. ($12,170.40)
Change Order #14 Sump and strainer valve ($1,815.55)
Unit heater change ($2,167.72)
Revised fresh air duct ($3,758.10)
Shop ceiling fan ($12,537.92)
Rainwater tank slab ($670.48)
Sand storage light ($4,168.68)
($25,118.45)
Repay from streets for light 4,168.68
($20,949.77)
Non-budget changes Pre-bid items charged to project ($3,310.93)
Expenditures to Date ($47,842.58)
Contingency Balance Remaining $80,659.12
Attachments: Change Order Form #14
Change Order Resolution # 4287
Report compiled on: September 8, 2010
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COMMISSION RESOLUTION NO. 4287
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF
BOZEMAN, MONTANA, APPROVING ALTERATION/MODIFICATION OF
CONTRACT WITH BN BUILDERS, BOZEMAN, MONTANA.
WHEREAS, the City Commission did, on the 5th day of October 2009, authorize award of the
bid for the Construction of the Vehicle Maintenance Building and HRDC Bus Barn to BN Builders,
Bozeman, Montana; and
WHEREAS, Section 7-5-4308, Montana Code Annotated, provides that any such alterations or
modifications of the specifications and/or plans of the contract be made by resolution; and
WHEREAS, it has become necessary in the prosecution of the work to make alterations or
modifications to the specifications and/or plans of the contract.
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City of Bozeman,
Montana, that the proposed modifications and/or alterations to the contract between the City of Bozeman,
a municipal corporation, and BN Builders, Bozeman, Montana, as contained in Change Order #14,
attached hereto, be and the same are hereby approved; and the City Manager is hereby authorized and
directed to execute the contract change order for and on behalf of the City; and the City Clerk is
authorized and directed to attest such signature.
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Resolution No. 4287 Change order #14
Page 2 of 2
PASSED AND ADOPTED by the City Commission of the City of Bozeman, Montana, at a
regular session thereof held on the 20th day of September, 2010.
__________________________________________
JEFFREY K. KRAUSS
Mayor
ATTEST:
________________________________________
STACY ULMEN, CMC
City Clerk
APPROVED AS TO FORM:
__________________________________________
GREG SULLIVAN
City Attorney
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